v8/test/unittests/interpreter/bytecode-generator-unittest.cc

// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "src/interpreter/bytecode-generator.h"

#include <fstream>

#include "src/init/v8.h"
#include "src/interpreter/bytecode-array-iterator.h"
#include "src/interpreter/interpreter.h"
#include "src/objects/objects-inl.h"
#include "test/unittests/interpreter/bytecode-expectations-printer.h"
#include "test/unittests/test-utils.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace v8 {

namespace internal {
namespace interpreter {

class BytecodeGeneratorTest : public TestWithContext {
 public:
  BytecodeGeneratorTest() : printer_(isolate()) {}
  static void SetUpTestSuite() {
    i::v8_flags.always_turbofan = false;
    i::v8_flags.allow_natives_syntax = true;
    i::v8_flags.enable_lazy_source_positions = false;
    TestWithContext::SetUpTestSuite();
  }

  BytecodeExpectationsPrinter& printer() { return printer_; }

 private:
  BytecodeExpectationsPrinter printer_;
};

int global_counter = 0;  // For unique variable/property names.

std::string LoadUniqueProperties(int n) {
  // Don't take any fancy recursive shortcuts here because
  // {LoadUniqueProperty} must actually be called {n} times.
  std::string result;
  for (int i = 0; i < n; i++) {
    result += "  b.name" + std::to_string(global_counter++) + ";\n";
  }
  return result;
}

std::string UniqueVars(int n) {
  std::string result;
  for (int i = 0; i < n; i++) {
    result += "var a" + std::to_string(global_counter++) + " = 0;\n";
  }
  return result;
}

std::string Repeat(std::string s, int n) {
  if (n == 1) return s;
  std::string half = Repeat(s, n >> 1);
  std::string result = half + half;
  if (n & 1) result += s;
  return result;
}

static const char* kGoldenFileDirectory =
    "test/unittests/interpreter/bytecode_expectations/";

void SkipGoldenFileHeader(std::istream* stream) {
  std::string line;
  int separators_seen = 0;
  while (std::getline(*stream, line)) {
    if (line == "---") separators_seen += 1;
    if (separators_seen == 2) return;
  }
}

std::string LoadGolden(const std::string& golden_filename) {
  std::ifstream expected_file((kGoldenFileDirectory + golden_filename).c_str());
  CHECK(expected_file.is_open());
  SkipGoldenFileHeader(&expected_file);
  std::ostringstream expected_stream;
  // Restore the first separator, which was consumed by SkipGoldenFileHeader
  expected_stream << "---\n" << expected_file.rdbuf();
  return expected_stream.str();
}

template <size_t N>
std::string BuildActual(const BytecodeExpectationsPrinter& printer,
                        std::string (&snippet_list)[N],
                        const char* prologue = nullptr,
                        const char* epilogue = nullptr) {
  std::ostringstream actual_stream;
  for (std::string snippet : snippet_list) {
    std::string source_code;
    if (prologue) source_code += prologue;
    source_code += snippet;
    if (epilogue) source_code += epilogue;
    printer.PrintExpectation(&actual_stream, source_code);
  }
  return actual_stream.str();
}

// inplace left trim
static inline void ltrim(std::string* str) {
  str->erase(str->begin(),
             std::find_if(str->begin(), str->end(),
                          [](unsigned char ch) { return !std::isspace(ch); }));
}

// inplace right trim
static inline void rtrim(std::string* str) {
  str->erase(std::find_if(str->rbegin(), str->rend(),
                          [](unsigned char ch) { return !std::isspace(ch); })
                 .base(),
             str->end());
}

static inline std::string trim(std::string* str) {
  ltrim(str);
  rtrim(str);
  return *str;
}

bool CompareTexts(const std::string& generated, const std::string& expected) {
  std::istringstream generated_stream(generated);
  std::istringstream expected_stream(expected);
  std::string generated_line;
  std::string expected_line;
  // Line number does not include golden file header.
  int line_number = 0;
  bool strings_match = true;

  do {
    std::getline(generated_stream, generated_line);
    std::getline(expected_stream, expected_line);

    if (!generated_stream.good() && !expected_stream.good()) {
      return strings_match;
    }

    if (!generated_stream.good()) {
      std::cerr << "Expected has extra lines after line " << line_number
                << "\n";
      std::cerr << "  Expected: '" << expected_line << "'\n";
      return false;
    } else if (!expected_stream.good()) {
      std::cerr << "Generated has extra lines after line " << line_number
                << "\n";
      std::cerr << "  Generated: '" << generated_line << "'\n";
      return false;
    }

    if (trim(&generated_line) != trim(&expected_line)) {
      std::cerr << "Inputs differ at line " << line_number << "\n";
      std::cerr << "  Generated: '" << generated_line << "'\n";
      std::cerr << "  Expected:  '" << expected_line << "'\n";
      strings_match = false;
    }
    line_number++;
  } while (true);
}

TEST_F(BytecodeGeneratorTest, PrimitiveReturnStatements) {
  std::string snippets[] = {
      "",

      "return;\n",

      "return null;\n",

      "return true;\n",

      "return false;\n",

      "return 0;\n",

      "return +1;\n",

      "return -1;\n",

      "return +127;\n",

      "return -128;\n",

      "return 2.0;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PrimitiveReturnStatements.golden")));
}

TEST_F(BytecodeGeneratorTest, PrimitiveExpressions) {
  std::string snippets[] = {
      "var x = 0; return x;\n",

      "var x = 0; return x + 3;\n",

      "var x = 0; return 3 + x;\n",

      "var x = 0; return x - 3;\n",

      "var x = 0; return 3 - x;\n",

      "var x = 4; return x * 3;\n",

      "var x = 4; return 3 * x;\n",

      "var x = 4; return x / 3;\n",

      "var x = 4; return 3 / x;\n",

      "var x = 4; return x % 3;\n",

      "var x = 4; return 3 % x;\n",

      "var x = 1; return x | 2;\n",

      "var x = 1; return 2 | x;\n",

      "var x = 1; return x ^ 2;\n",

      "var x = 1; return 2 ^ x;\n",

      "var x = 1; return x & 2;\n",

      "var x = 1; return 2 & x;\n",

      "var x = 10; return x << 3;\n",

      "var x = 10; return 3 << x;\n",

      "var x = 10; return x >> 3;\n",

      "var x = 10; return 3 >> x;\n",

      "var x = 10; return x >>> 3;\n",

      "var x = 10; return 3 >>> x;\n",

      "var x = 0; return (x, 3);\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PrimitiveExpressions.golden")));
}

TEST_F(BytecodeGeneratorTest, LogicalExpressions) {
  std::string snippets[] = {
      "var x = 0; return x || 3;\n",

      "var x = 0; return (x == 1) || 3;\n",

      "var x = 0; return x && 3;\n",

      "var x = 0; return (x == 0) && 3;\n",

      "var x = 0; return x || (1, 2, 3);\n",

      "var a = 2, b = 3, c = 4; return a || (a, b, a, b, c = 5, 3);\n",

      // clang-format off
      "var x = 1; var a = 2, b = 3; return x || (" +
      Repeat("\n  a = 1, b = 2, ", 32) +
      "3);\n",

      "var x = 0; var a = 2, b = 3; return x && (" +
      Repeat("\n  a = 1, b = 2, ", 32) +
      "3);\n",

      "var x = 1; var a = 2, b = 3; return (x > 3) || (" +
      Repeat("\n  a = 1, b = 2, ", 32) +
      "3);\n",

      "var x = 0; var a = 2, b = 3; return (x < 5) && (" +
      Repeat("\n  a = 1, b = 2, ", 32) +
      "3);\n",
      // clang-format on

      "return 0 && 3;\n",

      "return 1 || 3;\n",

      "var x = 1; return x && 3 || 0, 1;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("LogicalExpressions.golden")));
}

TEST_F(BytecodeGeneratorTest, Parameters) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function f() { return this; }",

      "function f(arg1) { return arg1; }",

      "function f(arg1) { return this; }",

      "function f(arg1, arg2, arg3, arg4, arg5, arg6, arg7) { return arg4; }",

      "function f(arg1, arg2, arg3, arg4, arg5, arg6, arg7) { return this; }",

      "function f(arg1) { arg1 = 1; }",

      "function f(arg1, arg2, arg3, arg4) { arg2 = 1; }",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets, "", "\nf();"),
                     LoadGolden("Parameters.golden")));
}

TEST_F(BytecodeGeneratorTest, IntegerConstants) {
  std::string snippets[] = {
      "return 12345678;\n",

      "var a = 1234; return 5678;\n",

      "var a = 1234; return 1234;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("IntegerConstants.golden")));
}

TEST_F(BytecodeGeneratorTest, HeapNumberConstants) {
  std::string snippets[] = {
      "return 1.2;\n",

      "var a = 1.2; return 2.6;\n",

      "var a = 3.14; return 3.14;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("HeapNumberConstants.golden")));
}

TEST_F(BytecodeGeneratorTest, StringConstants) {
  std::string snippets[] = {
      "return \"This is a string\";\n",

      "var a = \"First string\"; return \"Second string\";\n",

      "var a = \"Same string\"; return \"Same string\";\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("StringConstants.golden")));
}

TEST_F(BytecodeGeneratorTest, PropertyLoads) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  // clang-format off
  std::string snippets[] = {
    "function f(a) { return a.name; }\n"
    "f({name : \"test\"});\n",

    "function f(a) { return a[\"key\"]; }\n"
    "f({key : \"test\"});\n",

    "function f(a) { return a[100]; }\n"
    "f({100 : \"test\"});\n",

    "function f(a, b) { return a[b]; }\n"
    "f({arg : \"test\"}, \"arg\");\n",

    "function f(a) { var b = a.name; return a[-124]; }\n"
    "f({\"-124\" : \"test\", name : 123 })",

    "function f(a) {\n"
    "  var b = {};\n" +
       LoadUniqueProperties(128) +
    "  return a.name;\n"
    "}\n"
    "f({name : \"test\"})\n",

    "function f(a, b) {\n"
    "  var c;\n"
    "  c = a[b];\n" +
       Repeat("  c = a[b];\n", 127) +
    "  return a[b];\n"
    "}\n"
    "f({name : \"test\"}, \"name\")\n",
  };
  // clang-format on

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PropertyLoads.golden")));
}

TEST_F(BytecodeGeneratorTest, PropertyLoadStore) {
  printer().set_wrap(false);
  printer().set_top_level(true);

  std::string snippets[] = {
      R"(
      l = {
        'aa': 1.1,
        'bb': 2.2
      };

      v = l['aa'] + l['bb'];
      l['bb'] = 7;
      l['aa'] = l['bb'];
      )",

      R"(
      l = {
        'cc': 3.1,
        'dd': 4.2
      };
      if (l['cc'] < 3) {
        l['cc'] = 3;
      } else {
        l['dd'] = 3;
      }
      )",
  };
  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PropertyLoadStore.golden")));
}

TEST_F(BytecodeGeneratorTest, IIFE) {
  printer().set_wrap(false);
  printer().set_top_level(true);
  printer().set_print_callee(true);

  std::string snippets[] = {
      R"(
      (function() {
        l = {};
        l.a = 2;
        l.b = l.a;
        return arguments.callee;
      })();
    )",
      R"(
      (function() {
        l = {
          'a': 4.3,
          'b': 3.4
        };
        if (l.a < 3) {
          l.a = 3;
        } else {
          l.a = l.b;
        }
        return arguments.callee;
      })();
    )",
      R"(
      this.f0 = function() {};
      this.f1 = function(a) {};
      this.f2 = function(a, b) {};
      this.f3 = function(a, b, c) {};
      this.f4 = function(a, b, c, d) {};
      this.f5 = function(a, b, c, d, e) {};
      (function() {
        this.f0();
        this.f1(1);
        this.f2(1, 2);
        this.f3(1, 2, 3);
        this.f4(1, 2, 3, 4);
        this.f5(1, 2, 3, 4, 5);
        return arguments.callee;
      })();
    )",
      R"(
      function f0() {}
      function f1(a) {}
      function f2(a, b) {}
      function f3(a, b, c) {}
      function f4(a, b, c, d) {}
      function f5(a, b, c, d, e) {}
      (function() {
        f0();
        f1(1);
        f2(1, 2);
        f3(1, 2, 3);
        f4(1, 2, 3, 4);
        f5(1, 2, 3, 4, 5);
        return arguments.callee;
      })();
    )",
  };
  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("IIFE.golden")));
}

TEST_F(BytecodeGeneratorTest, PropertyStores) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  // For historical reasons, this test expects the first unique identifier
  // to be 128.
  global_counter = 128;

  // clang-format off
  std::string snippets[] = {
    "function f(a) { a.name = \"val\"; }\n"
    "f({name : \"test\"})",

    "function f(a) { a[\"key\"] = \"val\"; }\n"
    "f({key : \"test\"})",

    "function f(a) { a[100] = \"val\"; }\n"
    "f({100 : \"test\"})",

    "function f(a, b) { a[b] = \"val\"; }\n"
    "f({arg : \"test\"}, \"arg\")",

    "function f(a) { a.name = a[-124]; }\n"
    "f({\"-124\" : \"test\", name : 123 })",

    "function f(a) { \"use strict\"; a.name = \"val\"; }\n"
    "f({name : \"test\"})",

    "function f(a, b) { \"use strict\"; a[b] = \"val\"; }\n"
    "f({arg : \"test\"}, \"arg\")",

    "function f(a) {\n"
    "  a.name = 1;\n"
    "  var b = {};\n" +
       LoadUniqueProperties(128) +
    "  a.name = 2;\n"
    "}\n"
    "f({name : \"test\"})\n",

    "function f(a) {\n"
    " 'use strict';\n"
    "  a.name = 1;\n"
    "  var b = {};\n" +
       LoadUniqueProperties(128) +
    "  a.name = 2;\n"
    "}\n"
    "f({name : \"test\"})\n",

    "function f(a, b) {\n"
    "  a[b] = 1;\n" +
       Repeat("  a[b] = 1;\n", 127) +
    "  a[b] = 2;\n"
    "}\n"
    "f({name : \"test\"})\n",

    "function f(a, b) {\n"
    "  'use strict';\n"
    "  a[b] = 1;\n" +
       Repeat("  a[b] = 1;\n", 127) +
    "  a[b] = 2;\n"
    "}\n"
    "f({name : \"test\"})\n",
  };
  // clang-format on

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PropertyStores.golden")));
}

#define FUNC_ARG "new (function Obj() { this.func = function() { return; }})()"

TEST_F(BytecodeGeneratorTest, PropertyCall) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  // For historical reasons, this test expects the first unique identifier
  // to be 384.
  global_counter = 384;

  // clang-format off
  std::string snippets[] = {
      "function f(a) { return a.func(); }\n"
      "f(" FUNC_ARG ")",

      "function f(a, b, c) { return a.func(b, c); }\n"
      "f(" FUNC_ARG ", 1, 2)",

      "function f(a, b) { return a.func(b + b, b); }\n"
      "f(" FUNC_ARG ", 1)",

      "function f(a) {\n"
      "  var b = {};\n" +
         LoadUniqueProperties(128) +
      "  a.func;\n"
      "  return a.func(); }\n"
      "f(" FUNC_ARG ")",

      "function f(a) { return a.func(1).func(2).func(3); }\n"
      "f(new (function Obj() { this.func = function(a) { return this; }})())",
  };
  // clang-format on

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PropertyCall.golden")));
}

TEST_F(BytecodeGeneratorTest, LoadGlobal) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  // For historical reasons, this test expects the first unique identifier
  // to be 512.
  global_counter = 512;

  // clang-format off
  std::string snippets[] = {
    "var a = 1;\n"
    "function f() { return a; }\n"
    "f()",

    "function t() { }\n"
    "function f() { return t; }\n"
    "f()",

    "a = 1;\n"
    "function f() { return a; }\n"
    "f()",

    "a = 1;\n"
    "function f(c) {\n"
    "  var b = {};\n" +
       LoadUniqueProperties(128) +
    "  return a;\n"
    "}\n"
    "f({name: 1});\n",
  };
  // clang-format on

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("LoadGlobal.golden")));
}

TEST_F(BytecodeGeneratorTest, StoreGlobal) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  // For historical reasons, this test expects the first unique identifier
  // to be 640.
  global_counter = 640;

  // clang-format off
  std::string snippets[] = {
    "var a = 1;\n"
    "function f() { a = 2; }\n"
    "f();\n",

    "var a = \"test\"; function f(b) { a = b; }\n"
    "f(\"global\");\n",

    "'use strict'; var a = 1;\n"
    "function f() { a = 2; }\n"
    "f();\n",

    "a = 1;\n"
    "function f() { a = 2; }\n"
    "f();\n",

    "a = 1;\n"
    "function f(c) {\n"
    "  var b = {};\n" +
       LoadUniqueProperties(128) +
    "  a = 2;\n"
    "}\n"
    "f({name: 1});\n",

    "a = 1;\n"
    "function f(c) {\n"
    "  'use strict';\n"
    "  var b = {};\n" +
       LoadUniqueProperties(128) +
    "  a = 2;\n"
    "}\n"
    "f({name: 1});\n",
  };
  // clang-format on

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("StoreGlobal.golden")));
}

TEST_F(BytecodeGeneratorTest, CallGlobal) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function t() { }\n"
      "function f() { return t(); }\n"
      "f();\n",

      "function t(a, b, c) { }\n"
      "function f() { return t(1, 2, 3); }\n"
      "f();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CallGlobal.golden")));
}

TEST_F(BytecodeGeneratorTest, CallRuntime) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function f() { %TheHole() }\n"
      "f();\n",

      "function f(a) { return %IsArray(a) }\n"
      "f(undefined);\n",

      "function f() { return %Add(1, 2) }\n"
      "f();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CallRuntime.golden")));
}

TEST_F(BytecodeGeneratorTest, IfConditions) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  // clang-format off
  std::string snippets[] = {
    "function f() {\n"
    "  if (0) {\n"
    "    return 1;\n"
    "  } else {\n"
    "    return -1;\n"
    "  }\n"
    "};\n"
    "f();\n",

    "function f() {\n"
    "  if ('lucky') {\n"
    "    return 1;\n"
    "  } else {\n"
    "    return -1;\n"
    "  }\n"
    "};\n"
    "f();\n",

    "function f() {\n"
    "  if (false) {\n"
    "    return 1;\n"
    "  } else {\n"
    "    return -1;\n"
    "  }\n"
    "};\n"
    "f();\n",

    "function f() {\n"
    "  if (false) {\n"
    "    return 1;\n"
    "  }\n"
    "};\n"
    "f();\n",

    "function f() {\n"
    "  var a = 1;\n"
    "  if (a) {\n"
    "    a += 1;\n"
    "  } else {\n"
    "    return 2;\n"
    "  }\n"
    "};\n"
    "f();\n",

    "function f(a) {\n"
    "  if (a <= 0) {\n"
    "    return 200;\n"
    "  } else {\n"
    "    return -200;\n"
    "  }\n"
    "};\n"
    "f(99);\n",

    "function f(a, b) { if (a in b) { return 200; } }"
    "f('prop', { prop: 'yes'});\n",

    "function f(z) { var a = 0; var b = 0; if (a === 0.01) {\n" +
      Repeat("  b = a; a = b;\n", 64) +
    " return 200; } else { return -200; } } f(0.001);\n",

    "function f() {\n"
    "  var a = 0; var b = 0;\n"
    "  if (a) {\n" +
         Repeat("  b = a; a = b;\n", 64) +
    "  return 200; } else { return -200; }\n"
    "};\n"
    "f();\n",

    "function f(a, b) {\n"
    "  if (a == b) { return 1; }\n"
    "  if (a === b) { return 1; }\n"
    "  if (a < b) { return 1; }\n"
    "  if (a > b) { return 1; }\n"
    "  if (a <= b) { return 1; }\n"
    "  if (a >= b) { return 1; }\n"
    "  if (a in b) { return 1; }\n"
    "  if (a instanceof b) { return 1; }\n"
    "  return 0;\n"
    "}\n"
    "f(1, 1);\n",

    "function f() {\n"
    "  var a = 0;\n"
    "  if (a) {\n"
    "    return 20;\n"
    "  } else {\n"
    "    return -20;\n"
    "  }\n"
    "};\n"
    "f();\n",

    "function f(a, b) {\n"
    "  if (a == b || a < 0) {\n"
    "    return 1;\n"
    "  } else if (a > 0 && b > 0) {\n"
    "    return 0;\n"
    "  } else {\n"
    "    return -1;\n"
    "  }\n"
    "};\n"
    "f(-1, 1);\n",
  };
  // clang-format on

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("IfConditions.golden")));
}

TEST_F(BytecodeGeneratorTest, DeclareGlobals) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");
  printer().set_top_level(true);

  std::string snippets[] = {
      "var a = 1;\n",

      "function f() {}\n",

      "var a = 1;\n"
      "a=2;\n",

      "function f() {}\n"
      "f();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("DeclareGlobals.golden")));
}

TEST_F(BytecodeGeneratorTest, BreakableBlocks) {
  std::string snippets[] = {
      "var x = 0;\n"
      "label: {\n"
      "  x = x + 1;\n"
      "  break label;\n"
      "  x = x + 1;\n"
      "}\n"
      "return x;\n",

      "var sum = 0;\n"
      "outer: {\n"
      "  for (var x = 0; x < 10; ++x) {\n"
      "    for (var y = 0; y < 3; ++y) {\n"
      "      ++sum;\n"
      "      if (x + y == 12) { break outer; }\n"
      "    }\n"
      "  }\n"
      "}\n"
      "return sum;\n",

      "outer: {\n"
      "  let y = 10;\n"
      "  function f() { return y; }\n"
      "  break outer;\n"
      "}\n",

      "let x = 1;\n"
      "outer: {\n"
      "  inner: {\n"
      "   let y = 2;\n"
      "    function f() { return x + y; }\n"
      "    if (y) break outer;\n"
      "    y = 3;\n"
      "  }\n"
      "}\n"
      "x = 4;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("BreakableBlocks.golden")));
}

TEST_F(BytecodeGeneratorTest, BasicLoops) {
  std::string snippets[] = {
      "var x = 0;\n"
      "while (false) { x = 99; break; continue; }\n"
      "return x;\n",

      "var x = 0;\n"
      "while (false) {\n"
      "  x = x + 1;\n"
      "};\n"
      "return x;\n",

      "var x = 0;\n"
      "var y = 1;\n"
      "while (x < 10) {\n"
      "  y = y * 12;\n"
      "  x = x + 1;\n"
      "  if (x == 3) continue;\n"
      "  if (x == 4) break;\n"
      "}\n"
      "return y;\n",

      "var i = 0;\n"
      "while (true) {\n"
      "  if (i < 0) continue;\n"
      "  if (i == 3) break;\n"
      "  if (i == 4) break;\n"
      "  if (i == 10) continue;\n"
      "  if (i == 5) break;\n"
      "  i = i + 1;\n"
      "}\n"
      "return i;\n",

      "var i = 0;\n"
      "while (true) {\n"
      "  while (i < 3) {\n"
      "    if (i == 2) break;\n"
      "    i = i + 1;\n"
      "  }\n"
      "  i = i + 1;\n"
      "  break;\n"
      "}\n"
      "return i;\n",

      "var x = 10;\n"
      "var y = 1;\n"
      "while (x) {\n"
      "  y = y * 12;\n"
      "  x = x - 1;\n"
      "}\n"
      "return y;\n",

      "var x = 0; var y = 1;\n"
      "do {\n"
      "  y = y * 10;\n"
      "  if (x == 5) break;\n"
      "  if (x == 6) continue;\n"
      "  x = x + 1;\n"
      "} while (x < 10);\n"
      "return y;\n",

      "var x = 10;\n"
      "var y = 1;\n"
      "do {\n"
      "  y = y * 12;\n"
      "  x = x - 1;\n"
      "} while (x);\n"
      "return y;\n",

      "var x = 0; var y = 1;\n"
      "do {\n"
      "  y = y * 10;\n"
      "  if (x == 5) break;\n"
      "  x = x + 1;\n"
      "  if (x == 6) continue;\n"
      "} while (false);\n"
      "return y;\n",

      "var x = 0; var y = 1;\n"
      "do {\n"
      "  y = y * 10;\n"
      "  if (x == 5) break;\n"
      "  x = x + 1;\n"
      "  if (x == 6) continue;\n"
      "} while (true);\n"
      "return y;\n",

      "var x = 0;\n"
      "for (;;) {\n"
      "  if (x == 1) break;\n"
      "  if (x == 2) continue;\n"
      "  x = x + 1;\n"
      "}\n",

      "for (var x = 0;;) {\n"
      "  if (x == 1) break;\n"
      "  if (x == 2) continue;\n"
      "  x = x + 1;\n"
      "}\n",

      "var x = 0;\n"
      "for (;; x = x + 1) {\n"
      "  if (x == 1) break;\n"
      "  if (x == 2) continue;\n"
      "}\n",

      "for (var x = 0;; x = x + 1) {\n"
      "  if (x == 1) break;\n"
      "  if (x == 2) continue;\n"
      "}\n",

      "var u = 0;\n"
      "for (var i = 0; i < 100; i = i + 1) {\n"
      "  u = u + 1;\n"
      "  continue;\n"
      "}\n",

      "var y = 1;\n"
      "for (var x = 10; x; --x) {\n"
      "  y = y * 12;\n"
      "}\n"
      "return y;\n",

      "var x = 0;\n"
      "for (var i = 0; false; i++) {\n"
      "  x = x + 1;\n"
      "};\n"
      "return x;\n",

      "var x = 0;\n"
      "for (var i = 0; true; ++i) {\n"
      "  x = x + 1;\n"
      "  if (x == 20) break;\n"
      "};\n"
      "return x;\n",

      "var a = 0;\n"
      "while (a) {\n"
      "  { \n"
      "   let z = 1;\n"
      "   function f() { z = 2; }\n"
      "   if (z) continue;\n"
      "   z++;\n"
      "  }\n"
      "}\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("BasicLoops.golden")));
}

TEST_F(BytecodeGeneratorTest, UnaryOperators) {
  std::string snippets[] = {
      "var x = 0;\n"
      "while (x != 10) {\n"
      "  x = x + 10;\n"
      "}\n"
      "return x;\n",

      "var x = false;\n"
      "do {\n"
      "  x = !x;\n"
      "} while(x == false);\n"
      "return x;\n",

      "var x = 101;\n"
      "return void(x * 3);\n",

      "var x = 1234;\n"
      "var y = void (x * x - 1);\n"
      "return y;\n",

      "var x = 13;\n"
      "return ~x;\n",

      "var x = 13;\n"
      "return +x;\n",

      "var x = 13;\n"
      "return -x;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("UnaryOperators.golden")));
}

TEST_F(BytecodeGeneratorTest, Typeof) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function f() {\n"
      " var x = 13;\n"
      " return typeof(x);\n"
      "};",

      "var x = 13;\n"
      "function f() {\n"
      " return typeof(x);\n"
      "};",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets, "", "\nf();"),
                     LoadGolden("Typeof.golden")));
}

TEST_F(BytecodeGeneratorTest, CompareTypeOf) {
  std::string snippets[] = {
      "return typeof(1) === 'number';\n",

      "return 'string' === typeof('foo');\n",

      "return typeof(true) == 'boolean';\n",

      "return 'string' === typeof(undefined);\n",

      "return 'unknown' === typeof(undefined);\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CompareTypeOf.golden")));
}

TEST_F(BytecodeGeneratorTest, CompareBoolean) {
  std::string snippets[] = {
      "var a = 1;\n"
      "return a === true;\n",

      "var a = true;\n"
      "return true === a;\n",

      "var a = false;\n"
      "return true !== a;\n",

      "var a = 1;\n"
      "return true === a ? 1 : 2;\n",

      "var a = true;\n"
      "return false === a ? 1 : 2;\n",

      "var a = 1;\n"
      "return true !== a ? 1 : 2;\n",

      "var a = false;\n"
      "return false !== null ? 1 : 2;\n",

      "var a = 0;\n"
      "if (a !== true) {\n"
      "  return 1;\n"
      "}\n",

      "var a = true;\n"
      "var b = 0;\n"
      "while (a !== true) {\n"
      "  b++;\n"
      "}\n",

      "(0 === true) ? 1 : 2;\n",

      "(0 !== true) ? 1 : 2;\n",

      "(false === 0) ? 1 : 2;\n",

      "(0 === true || 0 === false) ? 1 : 2;\n",

      "if (0 === true || 0 === false) return 1;\n",

      "if (!('false' === false)) return 1;\n",

      "if (!('false' !== false)) return 1;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CompareBoolean.golden")));
}

TEST_F(BytecodeGeneratorTest, CompareNil) {
  std::string snippets[] = {
      "var a = 1;\n"
      "return a === null;\n",

      "var a = undefined;\n"
      "return undefined === a;\n",

      "var a = undefined;\n"
      "return undefined !== a;\n",

      "var a = 2;\n"
      "return a != null;\n",

      "var a = undefined;\n"
      "return undefined == a;\n",

      "var a = undefined;\n"
      "return undefined === a ? 1 : 2;\n",

      "var a = 0;\n"
      "return null == a ? 1 : 2;\n",

      "var a = 0;\n"
      "return undefined !== a ? 1 : 2;\n",

      "var a = 0;\n"
      "return a === null ? 1 : 2;\n",

      "var a = 0;\n"
      "if (a === null) {\n"
      "  return 1;\n"
      "} else {\n"
      "  return 2;\n"
      "}\n",

      "var a = 0;\n"
      "if (a != undefined) {\n"
      "  return 1;\n"
      "}\n",

      "var a = undefined;\n"
      "var b = 0;\n"
      "while (a !== undefined) {\n"
      "  b++;\n"
      "}\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CompareNil.golden")));
}

TEST_F(BytecodeGeneratorTest, Delete) {
  std::string snippets[] = {
      "var a = {x:13, y:14}; return delete a.x;\n",

      "'use strict'; var a = {x:13, y:14}; return delete a.x;\n",

      "var a = {1:13, 2:14}; return delete a[2];\n",

      "var a = 10; return delete a;\n",

      "'use strict';\n"
      "var a = {1:10};\n"
      "(function f1() {return a;});\n"
      "return delete a[1];\n",

      "return delete 'test';\n",

      "return delete this;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("Delete.golden")));
}

TEST_F(BytecodeGeneratorTest, GlobalDelete) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "var a = {x:13, y:14};\n"
      "function f() {\n"
      "  return delete a.x;\n"
      "};\n"
      "f();\n",

      "a = {1:13, 2:14};\n"
      "function f() {\n"
      "  'use strict';\n"
      "  return delete a[1];\n"
      "};\n"
      "f();\n",

      "var a = {x:13, y:14};\n"
      "function f() {\n"
      "  return delete a;\n"
      "};\n"
      "f();\n",

      "b = 30;\n"
      "function f() {\n"
      "  return delete b;\n"
      "};\n"
      "f();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("GlobalDelete.golden")));
}

TEST_F(BytecodeGeneratorTest, FunctionLiterals) {
  std::string snippets[] = {
      "return function(){ }\n",

      "return (function(){ })()\n",

      "return (function(x){ return x; })(1)\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("FunctionLiterals.golden")));
}

TEST_F(BytecodeGeneratorTest, RegExpLiterals) {
  std::string snippets[] = {
      "return /ab+d/;\n",

      "return /(\\w+)\\s(\\w+)/i;\n",

      "return /ab+d/.exec('abdd');\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("RegExpLiterals.golden")));
}

TEST_F(BytecodeGeneratorTest, ArrayLiterals) {
  std::string snippets[] = {
      "return [ 1, 2 ];\n",

      "var a = 1; return [ a, a + 1 ];\n",

      "return [ [ 1, 2 ], [ 3 ] ];\n",

      "var a = 1; return [ [ a, 2 ], [ a + 2 ] ];\n",

      "var a = [ 1, 2 ]; return [ ...a ];\n",

      "var a = [ 1, 2 ]; return [ 0, ...a ];\n",

      "var a = [ 1, 2 ]; return [ ...a, 3 ];\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ArrayLiterals.golden")));
}

TEST_F(BytecodeGeneratorTest, ObjectLiterals) {
  std::string snippets[] = {
      "return { };\n",

      "return { name: 'string', val: 9.2 };\n",

      "var a = 1; return { name: 'string', val: a };\n",

      "var a = 1; return { val: a, val: a + 1 };\n",

      "return { func: function() { } };\n",

      "return { func(a) { return a; } };\n",

      "return { get a() { return 2; } };\n",

      "return { get a() { return this.x; }, set a(val) { this.x = val } };\n",

      "return { set b(val) { this.y = val } };\n",

      "var a = 1; return { 1: a };\n",

      "return { __proto__: null };\n",

      "var a = 'test'; return { [a]: 1 };\n",

      "var a = 'test'; return { val: a, [a]: 1 };\n",

      "var a = 'test'; return { [a]: 1, __proto__: {} };\n",

      "var n = 'name'; return { [n]: 'val', get a() { }, set a(b) {} };\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ObjectLiterals.golden")));
}

TEST_F(BytecodeGeneratorTest, TopLevelObjectLiterals) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");
  printer().set_top_level(true);

  std::string snippets[] = {
      "var a = { func: function() { } };\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("TopLevelObjectLiterals.golden")));
}

TEST_F(BytecodeGeneratorTest, TryCatch) {
  std::string snippets[] = {
      "try { return 1; } catch(e) { return 2; }\n",

      "var a;\n"
      "try { a = 1 } catch(e1) {};\n"
      "try { a = 2 } catch(e2) { a = 3 }\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("TryCatch.golden")));
}

TEST_F(BytecodeGeneratorTest, TryFinally) {
  std::string snippets[] = {
      "var a = 1;\n"
      "try { a = 2; } finally { a = 3; }\n",

      "var a = 1;\n"
      "try { a = 2; } catch(e) { a = 20 } finally { a = 3; }\n",

      "var a; try {\n"
      "  try { a = 1 } catch(e) { a = 2 }\n"
      "} catch(e) { a = 20 } finally { a = 3; }\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("TryFinally.golden")));
}

TEST_F(BytecodeGeneratorTest, Throw) {
  std::string snippets[] = {
      "throw 1;\n",

      "throw 'Error';\n",

      "var a = 1; if (a) { throw 'Error'; };\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("Throw.golden")));
}

TEST_F(BytecodeGeneratorTest, CallNew) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function bar() { this.value = 0; }\n"
      "function f() { return new bar(); }\n"
      "f();\n",

      "function bar(x) { this.value = 18; this.x = x;}\n"
      "function f() { return new bar(3); }\n"
      "f();\n",

      "function bar(w, x, y, z) {\n"
      "  this.value = 18;\n"
      "  this.x = x;\n"
      "  this.y = y;\n"
      "  this.z = z;\n"
      "}\n"
      "function f() { return new bar(3, 4, 5); }\n"
      "f();\n",

      "function f() { new class {}; }\n"
      "f();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CallNew.golden")));
}

TEST_F(BytecodeGeneratorTest, ContextVariables) {
  // The wide check below relies on MIN_CONTEXT_SLOTS + 3 + 250 == 256, if this
  // ever changes, the REPEAT_XXX should be changed to output the correct number
  // of unique variables to trigger the wide slot load / store.
  static_assert(Context::MIN_CONTEXT_EXTENDED_SLOTS + 3 + 250 == 256);

  // For historical reasons, this test expects the first unique identifier
  // to be 896.
  global_counter = 896;

  // clang-format off
  std::string snippets[] = {
    "var a; return function() { a = 1; };\n",

    "var a = 1; return function() { a = 2; };\n",

    "var a = 1; var b = 2; return function() { a = 2; b = 3 };\n",

    "var a; (function() { a = 2; })(); return a;\n",

    "'use strict';\n"
    "let a = 1;\n"
    "{ let b = 2; return function() { a + b; }; }\n",

    "'use strict';\n" +
     UniqueVars(252) +
    "eval();\n"
    "var b = 100;\n"
    "return b\n",
  };
  // clang-format on

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ContextVariables.golden")));
}

TEST_F(BytecodeGeneratorTest, ContextParameters) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function f(arg1) { return function() { arg1 = 2; }; }",

      "function f(arg1) { var a = function() { arg1 = 2; }; return arg1; }",

      "function f(a1, a2, a3, a4) { return function() { a1 = a3; }; }",

      "function f() { var self = this; return function() { self = 2; }; }",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets, "", "\nf();"),
                     LoadGolden("ContextParameters.golden")));
}

TEST_F(BytecodeGeneratorTest, OuterContextVariables) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function Outer() {\n"
      "  var outerVar = 1;\n"
      "  function Inner(innerArg) {\n"
      "    this.innerFunc = function() { return outerVar * innerArg; }\n"
      "  }\n"
      "  this.getInnerFunc = function() { return new Inner(1).innerFunc; }\n"
      "}\n"
      "var f = new Outer().getInnerFunc();",

      "function Outer() {\n"
      "  var outerVar = 1;\n"
      "  function Inner(innerArg) {\n"
      "    this.innerFunc = function() { outerVar = innerArg; }\n"
      "  }\n"
      "  this.getInnerFunc = function() { return new Inner(1).innerFunc; }\n"
      "}\n"
      "var f = new Outer().getInnerFunc();",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets, "", "\nf();"),
                     LoadGolden("OuterContextVariables.golden")));
}

TEST_F(BytecodeGeneratorTest, CountOperators) {
  std::string snippets[] = {
      "var a = 1; return ++a;\n",

      "var a = 1; return a++;\n",

      "var a = 1; return --a;\n",

      "var a = 1; return a--;\n",

      "var a = { val: 1 }; return a.val++;\n",

      "var a = { val: 1 }; return --a.val;\n",

      "var name = 'var'; var a = { val: 1 }; return a[name]--;\n",

      "var name = 'var'; var a = { val: 1 }; return ++a[name];\n",

      "var a = 1; var b = function() { return a }; return ++a;\n",

      "var a = 1; var b = function() { return a }; return a--;\n",

      "var idx = 1; var a = [1, 2]; return a[idx++] = 2;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CountOperators.golden")));
}

TEST_F(BytecodeGeneratorTest, GlobalCountOperators) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "var global = 1;\n"
      "function f() { return ++global; }\n"
      "f();\n",

      "var global = 1;\n"
      "function f() { return global--; }\n"
      "f();\n",

      "unallocated = 1;\n"
      "function f() { 'use strict'; return --unallocated; }\n"
      "f();\n",

      "unallocated = 1;\n"
      "function f() { return unallocated++; }\n"
      "f();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("GlobalCountOperators.golden")));
}

TEST_F(BytecodeGeneratorTest, CompoundExpressions) {
  std::string snippets[] = {
      "var a = 1; a += 2;\n",

      "var a = 1; a /= 2;\n",

      "var a = { val: 2 }; a.name *= 2;\n",

      "var a = { 1: 2 }; a[1] ^= 2;\n",

      "var a = 1; (function f() { return a; }); a |= 24;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CompoundExpressions.golden")));
}

TEST_F(BytecodeGeneratorTest, GlobalCompoundExpressions) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "var global = 1;\n"
      "function f() { return global &= 1; }\n"
      "f();\n",

      "unallocated = 1;\n"
      "function f() { return unallocated += 1; }\n"
      "f();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("GlobalCompoundExpressions.golden")));
}

TEST_F(BytecodeGeneratorTest, CreateArguments) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function f() { return arguments; }",

      "function f() { return arguments[0]; }",

      "function f() { 'use strict'; return arguments; }",

      "function f(a) { return arguments[0]; }",

      "function f(a, b, c) { return arguments; }",

      "function f(a, b, c) { 'use strict'; return arguments; }",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets, "", "\nf();"),
                     LoadGolden("CreateArguments.golden")));
}

TEST_F(BytecodeGeneratorTest, CreateRestParameter) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function f(...restArgs) { return restArgs; }",

      "function f(a, ...restArgs) { return restArgs; }",

      "function f(a, ...restArgs) { return restArgs[0]; }",

      "function f(a, ...restArgs) { return restArgs[0] + arguments[0]; }",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets, "", "\nf();"),
                     LoadGolden("CreateRestParameter.golden")));
}

TEST_F(BytecodeGeneratorTest, ForIn) {
  std::string snippets[] = {
      "for (var p in null) {}\n",

      "for (var p in undefined) {}\n",

      "for (var p in undefined) {}\n",

      "var x = 'potatoes';\n"
      "for (var p in x) { return p; }\n",

      "var x = 0;\n"
      "for (var p in [1,2,3]) { x += p; }\n",

      "var x = { 'a': 1, 'b': 2 };\n"
      "for (x['a'] in [10, 20, 30]) {\n"
      "  if (x['a'] == 10) continue;\n"
      "  if (x['a'] == 20) break;\n"
      "}\n",

      "var x = [ 10, 11, 12 ] ;\n"
      "for (x[0] in [1,2,3]) { return x[3]; }\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ForIn.golden")));
}

TEST_F(BytecodeGeneratorTest, ForOf) {
  std::string snippets[] = {
      "for (var p of [0, 1, 2]) {}\n",

      "var x = 'potatoes';\n"
      "for (var p of x) { return p; }\n",

      "for (var x of [10, 20, 30]) {\n"
      "  if (x == 10) continue;\n"
      "  if (x == 20) break;\n"
      "}\n",

      "var x = { 'a': 1, 'b': 2 };\n"
      "for (x['a'] of [1,2,3]) { return x['a']; }\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ForOf.golden")));
}

TEST_F(BytecodeGeneratorTest, Conditional) {
  std::string snippets[] = {
      "return 1 ? 2 : 3;\n",

      "return 1 ? 2 ? 3 : 4 : 5;\n",

      "return 0 < 1 ? 2 : 3;\n",

      "var x = 0;\n"
      "return x ? 2 : 3;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("Conditional.golden")));
}

TEST_F(BytecodeGeneratorTest, Switch) {
  // clang-format off
  std::string snippets[] = {
    "var a = 1;\n"
    "switch(a) {\n"
    " case 1: return 2;\n"
    " case 2: return 3;\n"
    "}\n",

    "var a = 1;\n"
    "switch(a) {\n"
    " case 1: a = 2; break;\n"
    " case 2: a = 3; break;\n"
    "}\n",

    "var a = 1;\n"
    "switch(a) {\n"
    " case 1: a = 2; // fall-through\n"
    " case 2: a = 3; break;\n"
    "}\n",

    "var a = 1;\n"
    "switch(a) {\n"
    " case 2: break;\n"
    " case 3: break;\n"
    " default: a = 1; break;\n"
    "}\n",

    "var a = 1;\n"
    "switch(typeof(a)) {\n"
    " case 2: a = 1; break;\n"
    " case 3: a = 2; break;\n"
    " default: a = 3; break;\n"
    "}\n",

    "var a = 1;\n"
    "switch(a) {\n"
    " case typeof(a): a = 1; break;\n"
    " default: a = 2; break;\n"
    "}\n",

    "var a = 1;\n"
    "switch(a) {\n"
    " case 1:\n" +
       Repeat("  a = 2;\n", 64) +
    "  break;\n"
    " case 2:\n"
    "  a = 3;\n"
    "  break;\n"
    "}\n",

    "var a = 1;\n"
    "switch(a) {\n"
    " case 1: \n"
    "   switch(a + 1) {\n"
    "      case 2 : a = 1; break;\n"
    "      default : a = 2; break;\n"
    "   }  // fall-through\n"
    " case 2: a = 3;\n"
    "}\n",
  };
  // clang-format on

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("Switch.golden")));
}

TEST_F(BytecodeGeneratorTest, BasicBlockToBoolean) {
  std::string snippets[] = {
      "var a = 1; if (a || a < 0) { return 1; }\n",

      "var a = 1; if (a && a < 0) { return 1; }\n",

      "var a = 1; a = (a || a < 0) ? 2 : 3;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("BasicBlockToBoolean.golden")));
}

TEST_F(BytecodeGeneratorTest, DeadCodeRemoval) {
  std::string snippets[] = {
      "return; var a = 1; a();\n",

      "if (false) { return; }; var a = 1;\n",

      "if (true) { return 1; } else { return 2; };\n",

      "var a = 1; if (a) { return 1; }; return 2;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("DeadCodeRemoval.golden")));
}

TEST_F(BytecodeGeneratorTest, ThisFunction) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "var f;\n"
      "f = function f() {};",

      "var f;\n"
      "f = function f() { return f; };",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets, "", "\nf();"),
                     LoadGolden("ThisFunction.golden")));
}

TEST_F(BytecodeGeneratorTest, NewTarget) {
  std::string snippets[] = {
      "return new.target;\n",

      "new.target;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("NewTarget.golden")));
}

TEST_F(BytecodeGeneratorTest, RemoveRedundantLdar) {
  std::string snippets[] = {
      "var ld_a = 1;\n"          // This test is to check Ldar does not
      "while(true) {\n"          // get removed if the preceding Star is
      "  ld_a = ld_a + ld_a;\n"  // in a different basicblock.
      "  if (ld_a > 10) break;\n"
      "}\n"
      "return ld_a;\n",

      "var ld_a = 1;\n"
      "do {\n"
      "  ld_a = ld_a + ld_a;\n"
      "  if (ld_a > 10) continue;\n"
      "} while(false);\n"
      "return ld_a;\n",

      "var ld_a = 1;\n"
      "  ld_a = ld_a + ld_a;\n"
      "  return ld_a;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("RemoveRedundantLdar.golden")));
}

TEST_F(BytecodeGeneratorTest, GenerateTestUndetectable) {
  std::string snippets[] = {
      "var obj_a = {val:1};\n"
      "var b = 10;\n"
      "if (obj_a == null) { b = 20;}\n"
      "return b;\n",

      "var obj_a = {val:1};\n"
      "var b = 10;\n"
      "if (obj_a == undefined) { b = 20;}\n"
      "return b;\n",

      "var obj_a = {val:1};\n"
      "var b = 10;\n"
      "if (obj_a != null) { b = 20;}\n"
      "return b;\n",

      "var obj_a = {val:1};\n"
      "var b = 10;\n"
      "if (obj_a != undefined) { b = 20;}\n"
      "return b;\n",

      "var obj_a = {val:1};\n"
      "var b = 10;\n"
      "if (obj_a === null) { b = 20;}\n"
      "return b;\n",

      "var obj_a = {val:1};\n"
      "var b = 10;\n"
      "if (obj_a === undefined) { b = 20;}\n"
      "return b;\n",

      "var obj_a = {val:1};\n"
      "var b = 10;\n"
      "if (obj_a !== null) { b = 20;}\n"
      "return b;\n",

      "var obj_a = {val:1};\n"
      "var b = 10;\n"
      "if (obj_a !== undefined) { b = 20;}\n"
      "return b;\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("GenerateTestUndetectable.golden")));
}

TEST_F(BytecodeGeneratorTest, AssignmentsInBinaryExpression) {
  std::string snippets[] = {
      "var x = 0, y = 1;\n"
      "return (x = 2, y = 3, x = 4, y = 5);\n",

      "var x = 55;\n"
      "var y = (x = 100);\n"
      "return y;\n",

      "var x = 55;\n"
      "x = x + (x = 100) + (x = 101);\n"
      "return x;\n",

      "var x = 55;\n"
      "x = (x = 56) - x + (x = 57);\n"
      "x++;\n"
      "return x;\n",

      "var x = 55;\n"
      "var y = x + (x = 1) + (x = 2) + (x = 3);\n"
      "return y;\n",

      "var x = 55;\n"
      "var x = x + (x = 1) + (x = 2) + (x = 3);\n"
      "return x;\n",

      "var x = 10, y = 20;\n"
      "return x + (x = 1) + (x + 1) * (y = 2) + (y = 3) + (x = 4) + (y = 5) + "
      "y;\n",

      "var x = 17;\n"
      "return 1 + x + (x++) + (++x);\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("AssignmentsInBinaryExpression.golden")));
}

TEST_F(BytecodeGeneratorTest, DestructuringAssignment) {
  std::string snippets[] = {
      "var x, a = [0,1,2,3];\n"
      "[x] = a;\n",

      "var x, y, a = [0,1,2,3];\n"
      "[,x,...y] = a;\n",

      "var x={}, y, a = [0];\n"
      "[x.foo,y=4] = a;\n",

      "var x, a = {x:1};\n"
      "({x} = a);\n",

      "var x={}, a = {y:1};\n"
      "({y:x.foo} = a);\n",

      "var x, a = {y:1, w:2, v:3};\n"
      "({x=0,...y} = a);\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("DestructuringAssignment.golden")));
}

TEST_F(BytecodeGeneratorTest, Eval) {
  std::string snippets[] = {
      "return eval('1;');\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("Eval.golden")));
}

TEST_F(BytecodeGeneratorTest, LookupSlot) {
  printer().set_test_function_name("f");

  // clang-format off
  std::string snippets[] = {
      "eval('var x = 10;'); return x;\n",

      "eval('var x = 10;'); return typeof x;\n",

      "x = 20; return eval('');\n",

      "var x = 20;\n"
      "f = function(){\n"
      "  eval('var x = 10');\n"
      "  return x;\n"
      "}\n"
      "f();\n",

      "x = 20;\n"
      "f = function(){\n"
      "  eval('var x = 10');\n"
      "  return x;\n"
      "}\n"
      "f();\n"
  };
  // clang-format on

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("LookupSlot.golden")));
}

TEST_F(BytecodeGeneratorTest, CallLookupSlot) {
  std::string snippets[] = {
      "g = function(){}; eval(''); return g();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CallLookupSlot.golden")));
}

// TODO(mythria): tests for variable/function declaration in lookup slots.

TEST_F(BytecodeGeneratorTest, LookupSlotInEval) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "return x;",

      "x = 10;",

      "'use strict'; x = 10;",

      "return typeof x;",
  };

  std::string actual = BuildActual(printer(), snippets,
                                   "var f;\n"
                                   "var x = 1;\n"
                                   "function f1() {\n"
                                   "  eval(\"function t() { ",

                                   " }; f = t; f();\");\n"
                                   "}\n"
                                   "f1();");

  CHECK(CompareTexts(actual, LoadGolden("LookupSlotInEval.golden")));
}

TEST_F(BytecodeGeneratorTest, DeleteLookupSlotInEval) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "delete x;",

      "return delete y;",

      "return delete z;",
  };

  std::string actual = BuildActual(printer(), snippets,
                                   "var f;\n"
                                   "var x = 1;\n"
                                   "z = 10;\n"
                                   "function f1() {\n"
                                   "  var y;\n"
                                   "  eval(\"function t() { ",

                                   " }; f = t; f();\");\n"
                                   "}\n"
                                   "f1();");

  CHECK(CompareTexts(actual, LoadGolden("DeleteLookupSlotInEval.golden")));
}

TEST_F(BytecodeGeneratorTest, WideRegisters) {
  // Prepare prologue that creates frame for lots of registers.
  std::ostringstream os;
  for (size_t i = 0; i < 157; ++i) {
    os << "var x" << i << " = 0;\n";
  }
  std::string prologue(os.str());

  std::string snippets[] = {
      "x0 = x127;\n"
      "return x0;\n",

      "x127 = x126;\n"
      "return x127;\n",

      "if (x2 > 3) { return x129; }\n"
      "return x128;\n",

      "var x0 = 0;\n"
      "if (x129 == 3) { var x129 = x0; }\n"
      "if (x2 > 3) { return x0; }\n"
      "return x129;\n",

      "var x0 = 0;\n"
      "var x1 = 0;\n"
      "for (x128 = 0; x128 < 64; x128++) {"
      "  x1 += x128;"
      "}"
      "return x128;\n",

      "var x0 = 1234;\n"
      "var x1 = 0;\n"
      "for (x128 in x0) {"
      "  x1 += x128;"
      "}"
      "return x1;\n",

      "x0 = %Add(x64, x63);\n"
      "x1 = %Add(x27, x143);\n"
      "%TheHole();\n"
      "return x1;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets, prologue.c_str()),
                     LoadGolden("WideRegisters.golden")));
}

TEST_F(BytecodeGeneratorTest, ConstVariable) {
  std::string snippets[] = {
      "const x = 10;\n",

      "const x = 10; return x;\n",

      "const x = ( x = 20);\n",

      "const x = 10; x = 20;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ConstVariable.golden")));
}

TEST_F(BytecodeGeneratorTest, LetVariable) {
  std::string snippets[] = {
      "let x = 10;\n",

      "let x = 10; return x;\n",

      "let x = (x = 20);\n",

      "let x = 10; x = 20;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("LetVariable.golden")));
}

TEST_F(BytecodeGeneratorTest, ConstVariableContextSlot) {
  // TODO(mythria): Add tests for initialization of this via super calls.
  // TODO(mythria): Add tests that walk the context chain.
  std::string snippets[] = {
      "const x = 10; function f1() {return x;}\n",

      "const x = 10; function f1() {return x;} return x;\n",

      "const x = (x = 20); function f1() {return x;}\n",

      "const x = 10; x = 20; function f1() {return x;}\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ConstVariableContextSlot.golden")));
}

TEST_F(BytecodeGeneratorTest, LetVariableContextSlot) {
  std::string snippets[] = {
      "let x = 10; function f1() {return x;}\n",

      "let x = 10; function f1() {return x;} return x;\n",

      "let x = (x = 20); function f1() {return x;}\n",

      "let x = 10; x = 20; function f1() {return x;}\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("LetVariableContextSlot.golden")));
}

TEST_F(BytecodeGeneratorTest, WithStatement) {
  std::string snippets[] = {
      "with ({x:42}) { return x; }\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("WithStatement.golden")));
}

TEST_F(BytecodeGeneratorTest, DoDebugger) {
  std::string snippets[] = {
      "debugger;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("DoDebugger.golden")));
}

TEST_F(BytecodeGeneratorTest, ClassDeclarations) {
  std::string snippets[] = {
      "class Person {\n"
      "  constructor(name) { this.name = name; }\n"
      "  speak() { console.log(this.name + ' is speaking.'); }\n"
      "}\n",

      "class person {\n"
      "  constructor(name) { this.name = name; }\n"
      "  speak() { console.log(this.name + ' is speaking.'); }\n"
      "}\n",

      "var n0 = 'a';\n"
      "var n1 = 'b';\n"
      "class N {\n"
      "  [n0]() { return n0; }\n"
      "  static [n1]() { return n1; }\n"
      "}\n",

      "var count = 0;\n"
      "class C { constructor() { count++; }}\n"
      "return new C();\n",

      "(class {})\n"
      "class E { static name () {}}\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ClassDeclarations.golden")));
}

TEST_F(BytecodeGeneratorTest, ClassAndSuperClass) {
  printer().set_wrap(false);
  printer().set_test_function_name("test");
  std::string snippets[] = {
      "var test;\n"
      "(function() {\n"
      "  class A {\n"
      "    method() { return 2; }\n"
      "  }\n"
      "  class B extends A {\n"
      "    method() { return super.method() + 1; }\n"
      "  }\n"
      "  test = new B().method;\n"
      "  test();\n"
      "})();\n",

      "var test;\n"
      "(function() {\n"
      "  class A {\n"
      "    get x() { return 1; }\n"
      "    set x(val) { return; }\n"
      "  }\n"
      "  class B extends A {\n"
      "    method() { super.x = 2; return super.x; }\n"
      "  }\n"
      "  test = new B().method;\n"
      "  test();\n"
      "})();\n",

      "var test;\n"
      "(function() {\n"
      "  class A {\n"
      "    constructor(x) { this.x_ = x; }\n"
      "  }\n"
      "  class B extends A {\n"
      "    constructor() { super(1); this.y_ = 2; }\n"
      "  }\n"
      "  test = new B().constructor;\n"
      "})();\n",

      "var test;\n"
      "(function() {\n"
      "  class A {\n"
      "    constructor() { this.x_ = 1; }\n"
      "  }\n"
      "  class B extends A {\n"
      "    constructor() { super(); this.y_ = 2; }\n"
      "  }\n"
      "  test = new B().constructor;\n"
      "})();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ClassAndSuperClass.golden")));
}

TEST_F(BytecodeGeneratorTest, PublicClassFields) {
  std::string snippets[] = {
      "{\n"
      "  class A {\n"
      "    a;\n"
      "    ['b'];\n"
      "  }\n"
      "\n"
      "  class B {\n"
      "    a = 1;\n"
      "    ['b'] = this.a;\n"
      "  }\n"
      "  new A;\n"
      "  new B;\n"
      "}\n",

      "{\n"
      "  class A extends class {} {\n"
      "    a;\n"
      "    ['b'];\n"
      "  }\n"
      "\n"
      "  class B extends class {} {\n"
      "    a = 1;\n"
      "    ['b'] = this.a;\n"
      "    foo() { return 1; }\n"
      "    constructor() {\n"
      "      super();\n"
      "    }\n"
      "  }\n"
      "\n"
      "  class C extends B {\n"
      "    a = 1;\n"
      "    ['b'] = this.a;\n"
      "    constructor() {\n"
      "      (() => super())();\n"
      "    }\n"
      "  }\n"
      "\n"
      "  new A;\n"
      "  new B;\n"
      "  new C;\n"
      "}\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PublicClassFields.golden")));
}

TEST_F(BytecodeGeneratorTest, PrivateClassFields) {
  std::string snippets[] = {
      "{\n"
      "  class A {\n"
      "    #a;\n"
      "    constructor() {\n"
      "      this.#a = 1;\n"
      "    }\n"
      "  }\n"
      "\n"
      "  class B {\n"
      "    #a = 1;\n"
      "  }\n"
      "  new A;\n"
      "  new B;\n"
      "}\n",

      "{\n"
      "  class A extends class {} {\n"
      "    #a;\n"
      "    constructor() {\n"
      "      super();\n"
      "      this.#a = 1;\n"
      "    }\n"
      "  }\n"
      "\n"
      "  class B extends class {} {\n"
      "    #a = 1;\n"
      "    #b = this.#a;\n"
      "    foo() { return this.#a; }\n"
      "    bar(v) { this.#b = v; }\n"
      "    constructor() {\n"
      "      super();\n"
      "      this.foo();\n"
      "      this.bar(3);\n"
      "    }\n"
      "  }\n"
      "\n"
      "  class C extends B {\n"
      "    #a = 2;\n"
      "    constructor() {\n"
      "      (() => super())();\n"
      "    }\n"
      "  }\n"
      "\n"
      "  new A;\n"
      "  new B;\n"
      "  new C;\n"
      "};\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PrivateClassFields.golden")));
}

TEST_F(BytecodeGeneratorTest, PrivateClassFieldAccess) {
  printer().set_wrap(false);
  printer().set_test_function_name("test");

  std::string snippets[] = {
      "class A {\n"
      "  #a;\n"
      "  #b;\n"
      "  constructor() {\n"
      "    this.#a = this.#b;\n"
      "  }\n"
      "}\n"
      "\n"
      "var test = A;\n"
      "new test;\n",

      "class B {\n"
      "  #a;\n"
      "  #b;\n"
      "  constructor() {\n"
      "    this.#a = this.#b;\n"
      "  }\n"
      "  force(str) {\n"
      "    eval(str);\n"
      "  }\n"
      "}\n"
      "\n"
      "var test = B;\n"
      "new test;\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PrivateClassFieldAccess.golden")));
}

TEST_F(BytecodeGeneratorTest, PrivateMethodDeclaration) {
  std::string snippets[] = {
      "{\n"
      "  class A {\n"
      "    #a() { return 1; }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class D {\n"
      "    #d() { return 1; }\n"
      "  }\n"
      "  class E extends D {\n"
      "    #e() { return 2; }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class A { foo() {} }\n"
      "  class C extends A {\n"
      "    #m() { return super.foo; }\n"
      "  }\n"
      "}\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PrivateMethodDeclaration.golden")));
}

TEST_F(BytecodeGeneratorTest, PrivateMethodAccess) {
  printer().set_wrap(false);
  printer().set_test_function_name("test");

  std::string snippets[] = {
      "class A {\n"
      "  #a() { return 1; }\n"
      "  constructor() { return this.#a(); }\n"
      "}\n"
      "\n"
      "var test = A;\n"
      "new A;\n",

      "class B {\n"
      "  #b() { return 1; }\n"
      "  constructor() { this.#b = 1; }\n"
      "}\n"
      "\n"
      "var test = B;\n"
      "new test;\n",

      "class C {\n"
      "  #c() { return 1; }\n"
      "  constructor() { this.#c++; }\n"
      "}\n"
      "\n"
      "var test = C;\n"
      "new test;\n",

      "class D {\n"
      "  #d() { return 1; }\n"
      "  constructor() { (() => this)().#d(); }\n"
      "}\n"
      "\n"
      "var test = D;\n"
      "new test;\n",

      "var test;\n"
      "class F extends class {} {\n"
      "  #method() { }\n"
      "  constructor() {\n"
      "    (test = () => super())();\n"
      "    this.#method();\n"
      "  }\n"
      "};\n"
      "new F;\n",

      "var test;\n"
      "class G extends class {} {\n"
      "  #method() { }\n"
      "  constructor() {\n"
      "    test = () => super();\n"
      "    test();\n"
      "    this.#method();\n"
      "  }\n"
      "};\n"
      "new G();\n",

      "var test;\n"
      "class H extends class {} {\n"
      "  #method() { }\n"
      "  constructor(str) {\n"
      "    eval(str);\n"
      "    this.#method();\n"
      "  }\n"
      "};\n"
      "new test('test = () => super(); test()');\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PrivateMethodAccess.golden")));
}

TEST_F(BytecodeGeneratorTest, PrivateAccessorAccess) {
  printer().set_wrap(false);
  printer().set_test_function_name("test");

  std::string snippets[] = {
      "class A {\n"
      "  get #a() { return 1; }\n"
      "  set #a(val) { }\n"
      "\n"
      "  constructor() {\n"
      "    this.#a++;\n"
      "    this.#a = 1;\n"
      "    return this.#a;\n"
      "  }\n"
      "}\n"
      "var test = A;\n"
      "new test;\n",

      "class B {\n"
      "  get #b() { return 1; }\n"
      "  constructor() { this.#b++; }\n"
      "}\n"
      "var test = B;\n"
      "new test;\n",

      "class C {\n"
      "  set #c(val) { }\n"
      "  constructor() { this.#c++; }\n"
      "}\n"
      "var test = C;\n"
      "new test;\n",

      "class D {\n"
      "  get #d() { return 1; }\n"
      "  constructor() { this.#d = 1; }\n"
      "}\n"
      "var test = D;\n"
      "new test;\n",

      "class E {\n"
      "  set #e(val) { }\n"
      "  constructor() { this.#e; }\n"
      "}\n"
      "var test = E;\n"
      "new test;\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PrivateAccessorAccess.golden")));
}

TEST_F(BytecodeGeneratorTest, StaticPrivateMethodDeclaration) {
  std::string snippets[] = {
      "{\n"
      "  class A {\n"
      "    static #a() { return 1; }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class A {\n"
      "    static get #a() { return 1; }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class A {\n"
      "    static set #a(val) { }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class A {\n"
      "    static get #a() { return 1; }\n"
      "    static set #a(val) { }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class A {\n"
      "    static #a() { }\n"
      "    #b() { }\n"
      "  }\n"
      "}\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("StaticPrivateMethodDeclaration.golden")));
}

TEST_F(BytecodeGeneratorTest, StaticPrivateMethodAccess) {
  printer().set_wrap(false);
  printer().set_test_function_name("test");

  std::string snippets[] = {
      "class A {\n"
      "  static #a() { return 1; }\n"
      "  static test() { return this.#a(); }\n"
      "}\n"
      "\n"
      "var test = A.test;\n"
      "test();\n",

      "class B {\n"
      "  static #b() { return 1; }\n"
      "  static test() { this.#b = 1; }\n"
      "}\n"
      "\n"
      "var test = B.test;\n"
      "test();\n",

      "class C {\n"
      "  static #c() { return 1; }\n"
      "  static test() { this.#c++; }\n"
      "}\n"
      "\n"
      "var test = C.test;\n"
      "test();\n",

      "class D {\n"
      "  static get #d() { return 1; }\n"
      "  static set #d(val) { }\n"
      "\n"
      "  static test() {\n"
      "    this.#d++;\n"
      "    this.#d = 1;\n"
      "    return this.#d;\n"
      "  }\n"
      "}\n"
      "\n"
      "var test = D.test;\n"
      "test();\n",

      "class E {\n"
      "  static get #e() { return 1; }\n"
      "  static test() { this.#e++; }\n"
      "}\n"
      "var test = E.test;\n"
      "test();\n",

      "class F {\n"
      "  static set #f(val) { }\n"
      "  static test() { this.#f++; }\n"
      "}\n"
      "var test = F.test;\n"
      "test();\n",

      "class G {\n"
      "  static get #d() { return 1; }\n"
      "  static test() { this.#d = 1; }\n"
      "}\n"
      "var test = G.test;\n"
      "test();\n",

      "class H {\n"
      "  set #h(val) { }\n"
      "  static test() { this.#h; }\n"
      "}\n"
      "var test = H.test;\n"
      "test();\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("StaticPrivateMethodAccess.golden")));
}

TEST_F(BytecodeGeneratorTest, PrivateAccessorDeclaration) {
  std::string snippets[] = {
      "{\n"
      "  class A {\n"
      "    get #a() { return 1; }\n"
      "    set #a(val) { }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class B {\n"
      "    get #b() { return 1; }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class C {\n"
      "    set #c(val) { }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class D {\n"
      "    get #d() { return 1; }\n"
      "    set #d(val) { }\n"
      "  }\n"
      "\n"
      "  class E extends D {\n"
      "    get #e() { return 2; }\n"
      "    set #e(val) { }\n"
      "  }\n"
      "}\n",

      "{\n"
      "  class A { foo() {} }\n"
      "  class C extends A {\n"
      "    get #a() { return super.foo; }\n"
      "  }\n"
      "  new C();\n"
      "}\n",

      "{\n"
      "  class A { foo(val) {} }\n"
      "  class C extends A {\n"
      "    set #a(val) { super.foo(val); }\n"
      "  }\n"
      "  new C();\n"
      "}\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("PrivateAccessorDeclaration.golden")));
}

TEST_F(BytecodeGeneratorTest, StaticClassFields) {
  std::string snippets[] = {
      "{\n"
      "  class A {\n"
      "    a;\n"
      "    ['b'];\n"
      "    static c;\n"
      "    static ['d'];\n"
      "  }\n"
      "\n"
      "  class B {\n"
      "    a = 1;\n"
      "    ['b'] = this.a;\n"
      "    static c = 3;\n"
      "    static ['d'] = this.c;\n"
      "  }\n"
      "  new A;\n"
      "  new B;\n"
      "}\n",

      "{\n"
      "  class A extends class {} {\n"
      "    a;\n"
      "    ['b'];\n"
      "    static c;\n"
      "    static ['d'];\n"
      "  }\n"
      "\n"
      "  class B extends class {} {\n"
      "    a = 1;\n"
      "    ['b'] = this.a;\n"
      "    static c = 3;\n"
      "    static ['d'] = this.c;\n"
      "    foo() { return 1; }\n"
      "    constructor() {\n"
      "      super();\n"
      "    }\n"
      "  }\n"
      "\n"
      "  class C extends B {\n"
      "    a = 1;\n"
      "    ['b'] = this.a;\n"
      "    static c = 3;\n"
      "    static ['d'] = super.foo();\n"
      "    constructor() {\n"
      "      (() => super())();\n"
      "    }\n"
      "  }\n"
      "\n"
      "  new A;\n"
      "  new B;\n"
      "  new C;\n"
      "}\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("StaticClassFields.golden")));
}

TEST_F(BytecodeGeneratorTest, Generators) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function* f() { }\n"
      "f();\n",

      "function* f() { yield 42 }\n"
      "f();\n",

      "function* f() { for (let x of [42]) yield x }\n"
      "f();\n",

      "function* g() { yield 42 }\n"
      "function* f() { yield* g() }\n"
      "f();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("Generators.golden")));
}

TEST_F(BytecodeGeneratorTest, AsyncGenerators) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "async function* f() { }\n"
      "f();\n",

      "async function* f() { yield 42 }\n"
      "f();\n",

      "async function* f() { for (let x of [42]) yield x }\n"
      "f();\n",

      "function* g() { yield 42 }\n"
      "async function* f() { yield* g() }\n"
      "f();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("AsyncGenerators.golden")));
}

TEST_F(BytecodeGeneratorTest, Modules) {
  printer().set_wrap(false);
  printer().set_module(true);
  printer().set_top_level(true);

  std::string snippets[] = {
      "import \"bar\";\n",

      "import {foo} from \"bar\";\n",

      "import {foo as goo} from \"bar\";\n"
      "goo(42);\n"
      "{ let x; { goo(42) } };\n",

      "export var foo = 42;\n"
      "foo++;\n"
      "{ let x; { foo++ } };\n",

      "export let foo = 42;\n"
      "foo++;\n"
      "{ let x; { foo++ } };\n",

      "export const foo = 42;\n"
      "foo++;\n"
      "{ let x; { foo++ } };\n",

      "export default (function () {});\n",

      "export default (class {});\n",

      "export {foo as goo} from \"bar\"\n",

      "export * from \"bar\"\n",

      "import * as foo from \"bar\"\n"
      "foo.f(foo, foo.x);\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("Modules.golden")));
}

TEST_F(BytecodeGeneratorTest, AsyncModules) {
  printer().set_wrap(false);
  printer().set_module(true);
  printer().set_top_level(true);

  std::string snippets[] = {
      "await 42;\n",

      "await import(\"foo\");\n",

      "await 42;\n"
      "async function foo() {\n"
      "  await 42;\n"
      "}\n"
      "foo();\n",

      "import * as foo from \"bar\";\n"
      "await import(\"goo\");\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("AsyncModules.golden")));
}

TEST_F(BytecodeGeneratorTest, SuperCallAndSpread) {
  printer().set_wrap(false);
  printer().set_test_function_name("test");
  std::string snippets[] = {
      "var test;\n"
      "(function() {\n"
      "  class A {\n"
      "    constructor(...args) { this.baseArgs = args; }\n"
      "  }\n"
      "  class B extends A {}\n"
      "  test = new B(1, 2, 3).constructor;\n"
      "})();\n",

      "var test;\n"
      "(function() {\n"
      "  class A {\n"
      "    constructor(...args) { this.baseArgs = args; }\n"
      "  }\n"
      "  class B extends A {\n"
      "    constructor(...args) { super(1, ...args); }\n"
      "  }\n"
      "  test = new B(1, 2, 3).constructor;\n"
      "})();\n",

      "var test;\n"
      "(function() {\n"
      "  class A {\n"
      "    constructor(...args) { this.baseArgs = args; }\n"
      "  }\n"
      "  class B extends A {\n"
      "    constructor(...args) { super(1, ...args, 1); }\n"
      "  }\n"
      "  test = new B(1, 2, 3).constructor;\n"
      "})();\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("SuperCallAndSpread.golden")));
}

TEST_F(BytecodeGeneratorTest, CallAndSpread) {
  std::string snippets[] = {"Math.max(...[1, 2, 3]);\n",
                            "Math.max(0, ...[1, 2, 3]);\n",
                            "Math.max(0, ...[1, 2, 3], 4);\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("CallAndSpread.golden")));
}

TEST_F(BytecodeGeneratorTest, NewAndSpread) {
  std::string snippets[] = {
      "class A { constructor(...args) { this.args = args; } }\n"
      "new A(...[1, 2, 3]);\n",

      "class A { constructor(...args) { this.args = args; } }\n"
      "new A(0, ...[1, 2, 3]);\n",

      "class A { constructor(...args) { this.args = args; } }\n"
      "new A(0, ...[1, 2, 3], 4);\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("NewAndSpread.golden")));
}

TEST_F(BytecodeGeneratorTest, ForAwaitOf) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "async function f() {\n"
      "  for await (let x of [1, 2, 3]) {}\n"
      "}\n"
      "f();\n",

      "async function f() {\n"
      "  for await (let x of [1, 2, 3]) { return x; }\n"
      "}\n"
      "f();\n",

      "async function f() {\n"
      "  for await (let x of [10, 20, 30]) {\n"
      "    if (x == 10) continue;\n"
      "    if (x == 20) break;\n"
      "  }\n"
      "}\n"
      "f();\n",

      "async function f() {\n"
      "  var x = { 'a': 1, 'b': 2 };\n"
      "  for (x['a'] of [1,2,3]) { return x['a']; }\n"
      "}\n"
      "f();\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ForAwaitOf.golden")));
}

TEST_F(BytecodeGeneratorTest, StandardForLoop) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function f() {\n"
      "  for (let x = 0; x < 10; ++x) { let y = x; }\n"
      "}\n"
      "f();\n",

      "function f() {\n"
      "  for (let x = 0; x < 10; ++x) { eval('1'); }\n"
      "}\n"
      "f();\n",

      "function f() {\n"
      "  for (let x = 0; x < 10; ++x) { (function() { return x; })(); }\n"
      "}\n"
      "f();\n",

      "function f() {\n"
      "  for (let { x, y } = { x: 0, y: 3 }; y > 0; --y) { let z = x + y; }\n"
      "}\n"
      "f();\n",

      "function* f() {\n"
      "  for (let x = 0; x < 10; ++x) { let y = x; }\n"
      "}\n"
      "f();\n",

      "function* f() {\n"
      "  for (let x = 0; x < 10; ++x) yield x;\n"
      "}\n"
      "f();\n",

      "async function f() {\n"
      "  for (let x = 0; x < 10; ++x) { let y = x; }\n"
      "}\n"
      "f();\n",

      "async function f() {\n"
      "  for (let x = 0; x < 10; ++x) await x;\n"
      "}\n"
      "f();\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("StandardForLoop.golden")));
}

TEST_F(BytecodeGeneratorTest, ForOfLoop) {
  printer().set_wrap(false);
  printer().set_test_function_name("f");

  std::string snippets[] = {
      "function f(arr) {\n"
      "  for (let x of arr) { let y = x; }\n"
      "}\n"
      "f([1, 2, 3]);\n",

      "function f(arr) {\n"
      "  for (let x of arr) { eval('1'); }\n"
      "}\n"
      "f([1, 2, 3]);\n",

      "function f(arr) {\n"
      "  for (let x of arr) { (function() { return x; })(); }\n"
      "}\n"
      "f([1, 2, 3]);\n",

      "function f(arr) {\n"
      "  for (let { x, y } of arr) { let z = x + y; }\n"
      "}\n"
      "f([{ x: 0, y: 3 }, { x: 1, y: 9 }, { x: -12, y: 17 }]);\n",

      "function* f(arr) {\n"
      "  for (let x of arr) { let y = x; }\n"
      "}\n"
      "f([1, 2, 3]);\n",

      "function* f(arr) {\n"
      "  for (let x of arr) yield x;\n"
      "}\n"
      "f([1, 2, 3]);\n",

      "async function f(arr) {\n"
      "  for (let x of arr) { let y = x; }\n"
      "}\n"
      "f([1, 2, 3]);\n",

      "async function f(arr) {\n"
      "  for (let x of arr) await x;\n"
      "}\n"
      "f([1, 2, 3]);\n"};

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("ForOfLoop.golden")));
}

TEST_F(BytecodeGeneratorTest, StringConcat) {
  std::string snippets[] = {
      "var a = 1;\n"
      "var b = 2;\n"
      "return a + b + 'string';\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "return 'string' + a + b;\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "return a + 'string' + b;\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "return 'foo' + a + 'bar' + b + 'baz' + 1;\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "return (a + 'string') + ('string' + b);\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "function foo(a, b) { };\n"
      "return 'string' + foo(a, b) + a + b;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("StringConcat.golden")));
}

TEST_F(BytecodeGeneratorTest, TemplateLiterals) {
  std::string snippets[] = {
      "var a = 1;\n"
      "var b = 2;\n"
      "return `${a}${b}string`;\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "return `string${a}${b}`;\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "return `${a}string${b}`;\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "return `foo${a}bar${b}baz${1}`;\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "return `${a}string` + `string${b}`;\n",

      "var a = 1;\n"
      "var b = 2;\n"
      "function foo(a, b) { };\n"
      "return `string${foo(a, b)}${a}${b}`;\n",
  };

  CHECK(CompareTexts(BuildActual(printer(), snippets),
                     LoadGolden("TemplateLiterals.golden")));
}

TEST_F(BytecodeGeneratorTest, ElideRedundantLoadOperationOfImmutableContext) {
  printer().set_wrap(false);
  printer().set_test_function_name("test");

  std::string snippets[] = {
      "var test;\n"
      "(function () {\n"
      "  var a = {b: 2, c: 3};\n"
      "  function foo() {a.b = a.c;}\n"
      "  foo();\n"
      "  test = foo;\n"
      "})();\n"};

  CHECK(CompareTexts(
      BuildActual(printer(), snippets),
      LoadGolden("ElideRedundantLoadOperationOfImmutableContext.golden")));
}

}  // namespace interpreter
}  // namespace internal
}  // namespace v8