v8/test/cctest/test-global-object.cc

// Copyright 2013 the V8 project authors. All rights reserved.
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#include "src/objects-inl.h"
#include "src/v8.h"
#include "test/cctest/cctest.h"

using ::v8::Array;
using ::v8::Context;
using ::v8::Local;
using ::v8::Value;

// This test fails if properties on the prototype of the global object appear
// as declared globals.
TEST(StrictUndeclaredGlobalVariable) {
  v8::HandleScope scope(CcTest::isolate());
  v8::Local<v8::String> var_name = v8_str("x");
  LocalContext context;
  v8::TryCatch try_catch(CcTest::isolate());
  v8::Local<v8::Script> script = v8_compile("\"use strict\"; x = 42;");
  v8::Local<v8::Object> proto = v8::Object::New(CcTest::isolate());
  v8::Local<v8::Object> global =
      context->Global()->GetPrototype().As<v8::Object>();
  proto->Set(context.local(), var_name, v8_num(100)).FromJust();
  global->SetPrototype(context.local(), proto).FromJust();
  CHECK(script->Run(context.local()).IsEmpty());
  CHECK(try_catch.HasCaught());
  v8::String::Utf8Value exception(CcTest::isolate(), try_catch.Exception());
  CHECK_EQ(0, strcmp("ReferenceError: x is not defined", *exception));
}


TEST(KeysGlobalObject_Regress2764) {
  LocalContext env1;
  v8::HandleScope scope(env1->GetIsolate());

  // Create second environment.
  v8::Local<Context> env2 = Context::New(env1->GetIsolate());

  Local<Value> token = v8_str("foo");

  // Set same security token for env1 and env2.
  env1->SetSecurityToken(token);
  env2->SetSecurityToken(token);

  // Create a reference to env2 global from env1 global.
  env1->Global()
      ->Set(env1.local(), v8_str("global2"), env2->Global())
      .FromJust();
  // Set some global variables in global2
  env2->Global()->Set(env2, v8_str("a"), v8_str("a")).FromJust();
  env2->Global()->Set(env2, v8_str("42"), v8_str("42")).FromJust();

  // List all entries from global2.
  Local<Array> result;
  result = Local<Array>::Cast(CompileRun("Object.keys(global2)"));
  CHECK_EQ(2u, result->Length());
  CHECK(
      v8_str("42")
          ->Equals(env1.local(), result->Get(env1.local(), 0).ToLocalChecked())
          .FromJust());
  CHECK(
      v8_str("a")
          ->Equals(env1.local(), result->Get(env1.local(), 1).ToLocalChecked())
          .FromJust());

  result =
      Local<Array>::Cast(CompileRun("Object.getOwnPropertyNames(global2)"));
  CHECK_LT(2u, result->Length());
  // Check that all elements are in the property names
  ExpectTrue("-1 < Object.getOwnPropertyNames(global2).indexOf('42')");
  ExpectTrue("-1 < Object.getOwnPropertyNames(global2).indexOf('a')");

  // Hold on to global from env2 and detach global from env2.
  env2->DetachGlobal();

  // List again all entries from the detached global2.
  result = Local<Array>::Cast(CompileRun("Object.keys(global2)"));
  CHECK_EQ(0u, result->Length());
  result =
      Local<Array>::Cast(CompileRun("Object.getOwnPropertyNames(global2)"));
  CHECK_EQ(0u, result->Length());
}

TEST(KeysGlobalObject_SetPrototype) {
  LocalContext env1;
  v8::HandleScope scope(env1->GetIsolate());

  // Create second environment.
  v8::Local<Context> env2 = Context::New(env1->GetIsolate());

  Local<Value> token = v8_str("foo");

  // Set same security token for env1 and env2.
  env1->SetSecurityToken(token);
  env2->SetSecurityToken(token);

  // Create a reference to env2 global from env1 global.
  env1->Global()
      ->GetPrototype()
      .As<v8::Object>()
      ->SetPrototype(env1.local(), env2->Global()->GetPrototype())
      .FromJust();
  // Set some global variables in global2
  env2->Global()->Set(env2, v8_str("a"), v8_str("a")).FromJust();
  env2->Global()->Set(env2, v8_str("42"), v8_str("42")).FromJust();

  // List all entries from global2.
  ExpectTrue("a == 'a'");
}