v8/test/cctest/test-flags.cc

// Copyright 2006-2008 the V8 project authors. All rights reserved.
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#include <stdlib.h>

#include "src/flags/flags.h"
#include "src/init/v8.h"
#include "test/cctest/cctest.h"

namespace v8 {
namespace internal {

// This test must be executed first!
TEST(Default) {
  CHECK(FLAG_testing_bool_flag);
  CHECK_EQ(13, FLAG_testing_int_flag);
  CHECK_EQ(2.5, FLAG_testing_float_flag);
  CHECK_EQ(0, strcmp(FLAG_testing_string_flag, "Hello, world!"));
}

static void SetFlagsToDefault() {
  FlagList::ResetAllFlags();
  TestDefault();
}


TEST(Flags1) {
  FlagList::PrintHelp();
}


TEST(Flags2) {
  SetFlagsToDefault();
  int argc = 8;
  const char* argv[] = { "Test2", "-notesting-bool-flag",
                         "--notesting-maybe-bool-flag", "notaflag",
                         "--testing_int_flag=77", "-testing_float_flag=.25",
                         "--testing_string_flag", "no way!" };
  CHECK_EQ(0, FlagList::SetFlagsFromCommandLine(&argc,
                                                const_cast<char **>(argv),
                                                false));
  CHECK_EQ(8, argc);
  CHECK(!FLAG_testing_bool_flag);
  CHECK(FLAG_testing_maybe_bool_flag.has_value);
  CHECK(!FLAG_testing_maybe_bool_flag.value);
  CHECK_EQ(77, FLAG_testing_int_flag);
  CHECK_EQ(.25, FLAG_testing_float_flag);
  CHECK_EQ(0, strcmp(FLAG_testing_string_flag, "no way!"));
}


TEST(Flags2b) {
  SetFlagsToDefault();
  const char* str =
      " -notesting-bool-flag notaflag   --testing_int_flag=77 "
      "-notesting-maybe-bool-flag   "
      "-testing_float_flag=.25  "
      "--testing_string_flag   no_way!  ";
  CHECK_EQ(0, FlagList::SetFlagsFromString(str, strlen(str)));
  CHECK(!FLAG_testing_bool_flag);
  CHECK(FLAG_testing_maybe_bool_flag.has_value);
  CHECK(!FLAG_testing_maybe_bool_flag.value);
  CHECK_EQ(77, FLAG_testing_int_flag);
  CHECK_EQ(.25, FLAG_testing_float_flag);
  CHECK_EQ(0, strcmp(FLAG_testing_string_flag, "no_way!"));
}


TEST(Flags3) {
  SetFlagsToDefault();
  int argc = 9;
  const char* argv[] =
      { "Test3", "--testing_bool_flag", "--testing-maybe-bool-flag", "notaflag",
        "--testing_int_flag", "-666",
        "--testing_float_flag", "-12E10", "-testing-string-flag=foo-bar" };
  CHECK_EQ(0, FlagList::SetFlagsFromCommandLine(&argc,
                                                const_cast<char **>(argv),
                                                true));
  CHECK_EQ(2, argc);
  CHECK(FLAG_testing_bool_flag);
  CHECK(FLAG_testing_maybe_bool_flag.has_value);
  CHECK(FLAG_testing_maybe_bool_flag.value);
  CHECK_EQ(-666, FLAG_testing_int_flag);
  CHECK_EQ(-12E10, FLAG_testing_float_flag);
  CHECK_EQ(0, strcmp(FLAG_testing_string_flag, "foo-bar"));
}


TEST(Flags3b) {
  SetFlagsToDefault();
  const char* str =
      "--testing_bool_flag --testing-maybe-bool-flag notaflag "
      "--testing_int_flag -666 "
      "--testing_float_flag -12E10 "
      "-testing-string-flag=foo-bar";
  CHECK_EQ(0, FlagList::SetFlagsFromString(str, strlen(str)));
  CHECK(FLAG_testing_bool_flag);
  CHECK(FLAG_testing_maybe_bool_flag.has_value);
  CHECK(FLAG_testing_maybe_bool_flag.value);
  CHECK_EQ(-666, FLAG_testing_int_flag);
  CHECK_EQ(-12E10, FLAG_testing_float_flag);
  CHECK_EQ(0, strcmp(FLAG_testing_string_flag, "foo-bar"));
}


TEST(Flags4) {
  SetFlagsToDefault();
  int argc = 3;
  const char* argv[] = { "Test4", "--testing_bool_flag", "--foo" };
  CHECK_EQ(0, FlagList::SetFlagsFromCommandLine(&argc,
                                                const_cast<char **>(argv),
                                                true));
  CHECK_EQ(2, argc);
  CHECK(!FLAG_testing_maybe_bool_flag.has_value);
}


TEST(Flags4b) {
  SetFlagsToDefault();
  const char* str = "--testing_bool_flag --foo";
  CHECK_EQ(2, FlagList::SetFlagsFromString(str, strlen(str)));
  CHECK(!FLAG_testing_maybe_bool_flag.has_value);
}


TEST(Flags5) {
  SetFlagsToDefault();
  int argc = 2;
  const char* argv[] = { "Test5", "--testing_int_flag=\"foobar\"" };
  CHECK_EQ(1, FlagList::SetFlagsFromCommandLine(&argc,
                                                const_cast<char **>(argv),
                                                true));
  CHECK_EQ(2, argc);
}


TEST(Flags5b) {
  SetFlagsToDefault();
  const char* str = "                     --testing_int_flag=\"foobar\"";
  CHECK_EQ(1, FlagList::SetFlagsFromString(str, strlen(str)));
}


TEST(Flags6) {
  SetFlagsToDefault();
  int argc = 4;
  const char* argv[] = { "Test5", "--testing-int-flag", "0",
                         "--testing_float_flag" };
  CHECK_EQ(3, FlagList::SetFlagsFromCommandLine(&argc,
                                                const_cast<char **>(argv),
                                                true));
  CHECK_EQ(2, argc);
}


TEST(Flags6b) {
  SetFlagsToDefault();
  const char* str = "       --testing-int-flag 0      --testing_float_flag    ";
  CHECK_EQ(3, FlagList::SetFlagsFromString(str, strlen(str)));
}

TEST(FlagsRemoveIncomplete) {
  // Test that processed command line arguments are removed, even
  // if the list of arguments ends unexpectedly.
  SetFlagsToDefault();
  int argc = 3;
  const char* argv[] = {"", "--testing-bool-flag", "--expose-gc-as"};
  CHECK_EQ(2, FlagList::SetFlagsFromCommandLine(&argc,
                                                const_cast<char **>(argv),
                                                true));
  CHECK(argv[1]);
  CHECK_EQ(2, argc);
}

TEST(FlagsJitlessImplications) {
  if (FLAG_jitless) {
    // Double-check implications work as expected. Our implication system is
    // fairly primitive and can break easily depending on the implication
    // definition order in flag-definitions.h.
    CHECK(!FLAG_opt);
    CHECK(!FLAG_validate_asm);
    CHECK(!FLAG_asm_wasm_lazy_compilation);
    CHECK(!FLAG_wasm_lazy_compilation);
  }
}

}  // namespace internal
}  // namespace v8