text: // Copyright 2008 the V8 project authors. All rights reserved.
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  //       notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  //       copyright notice, this list of conditions and the following
  //       disclaimer in the documentation and/or other materials provided
  //       with the distribution.
  //     * Neither the name of Google Inc. nor the names of its
  //       contributors may be used to endorse or promote products derived
  //       from this software without specific prior written permission.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #ifndef CCTEST_H_
  #define CCTEST_H_
  
  #include <memory>
  
  #include "include/libplatform/libplatform.h"
  #include "include/v8-platform.h"
  #include "src/base/enum-set.h"
  #include "src/debug/debug-interface.h"
  #include "src/flags.h"
  #include "src/heap/factory.h"
  #include "src/isolate.h"
  #include "src/objects.h"
  #include "src/register-configuration.h"
  #include "src/v8.h"
  #include "src/zone/accounting-allocator.h"
  
  namespace v8 {
  namespace base {
  
  class RandomNumberGenerator;
  
  }  // namespace base
  
  namespace internal {
  
  const auto GetRegConfig = RegisterConfiguration::Default;
  
  class HandleScope;
  class Zone;
  
  namespace compiler {
  
  class JSHeapBroker;
  
  }  // namespace compiler
  
  }  // namespace internal
  
  }  // namespace v8
  
  #ifndef TEST
  #define TEST(Name)                                                      \
    static void Test##Name();                                             \
    CcTest register_test_##Name(Test##Name, __FILE__, #Name, true, true); \
    static void Test##Name()
  #endif
  
  #ifndef UNINITIALIZED_TEST
  #define UNINITIALIZED_TEST(Name)                                         \
    static void Test##Name();                                              \
    CcTest register_test_##Name(Test##Name, __FILE__, #Name, true, false); \
    static void Test##Name()
  #endif
  
  #ifndef DISABLED_TEST
  #define DISABLED_TEST(Name)                                              \
    static void Test##Name();                                              \
    CcTest register_test_##Name(Test##Name, __FILE__, #Name, false, true); \
    static void Test##Name()
  #endif
  
  #define EXTENSION_LIST(V)                                                      \
    V(GC_EXTENSION,       "v8/gc")                                               \
    V(PRINT_EXTENSION,    "v8/print")                                            \
    V(PROFILER_EXTENSION, "v8/profiler")                                         \
    V(TRACE_EXTENSION,    "v8/trace")
  
  #define DEFINE_EXTENSION_ID(Name, Ident) Name##_ID,
  enum CcTestExtensionId { EXTENSION_LIST(DEFINE_EXTENSION_ID) kMaxExtensions };
  #undef DEFINE_EXTENSION_ID
  
  using CcTestExtensionFlags = v8::base::EnumSet<CcTestExtensionId>;
  
  #define DEFINE_EXTENSION_NAME(Name, Ident) Ident,
  static constexpr const char* kExtensionName[kMaxExtensions] = {
      EXTENSION_LIST(DEFINE_EXTENSION_NAME)};
  #undef DEFINE_EXTENSION_NAME
  
  class CcTest {
   public:
    typedef void (TestFunction)();
    CcTest(TestFunction* callback, const char* file, const char* name,
           bool enabled, bool initialize);
    ~CcTest() { i::DeleteArray(file_); }
    void Run();
    static CcTest* last() { return last_; }
    CcTest* prev() { return prev_; }
    const char* file() { return file_; }
    const char* name() { return name_; }
    bool enabled() { return enabled_; }
  
    static v8::Isolate* isolate() {
      CHECK_NOT_NULL(isolate_);
      v8::base::Relaxed_Store(&isolate_used_, 1);
      return isolate_;
    }
  
    static i::Isolate* InitIsolateOnce() {
      if (!initialize_called_) InitializeVM();
      return i_isolate();
    }
  
    static i::Isolate* i_isolate() {
      return reinterpret_cast<i::Isolate*>(isolate());
    }
  
    static i::Heap* heap();
  
    static void CollectGarbage(i::AllocationSpace space);
    static void CollectAllGarbage(i::Isolate* isolate = nullptr);
    static void CollectAllAvailableGarbage(i::Isolate* isolate = nullptr);
    static void PreciseCollectAllGarbage(i::Isolate* isolate = nullptr);
  
    static v8::base::RandomNumberGenerator* random_number_generator();
  
    static v8::Local<v8::Object> global();
  
    static v8::ArrayBuffer::Allocator* array_buffer_allocator() {
      return allocator_;
    }
  
    static void set_array_buffer_allocator(
        v8::ArrayBuffer::Allocator* allocator) {
      allocator_ = allocator;
    }
  
    // TODO(dcarney): Remove.
    // This must be called first in a test.
    static void InitializeVM();
  
    // Only for UNINITIALIZED_TESTs
    static void DisableAutomaticDispose();
  
    // Helper function to configure a context.
    // Must be in a HandleScope.
    static v8::Local<v8::Context> NewContext(
        v8::Isolate* isolate = CcTest::isolate()) {
      return NewContext({}, isolate);
    }
    static v8::Local<v8::Context> NewContext(
        CcTestExtensionFlags extension_flags,
        v8::Isolate* isolate = CcTest::isolate());
  
    static void TearDown();
  
   private:
    friend int main(int argc, char** argv);
    TestFunction* callback_;
    const char* file_;
    const char* name_;
    bool enabled_;
    bool initialize_;
    CcTest* prev_;
    static CcTest* last_;
    static v8::ArrayBuffer::Allocator* allocator_;
    static v8::Isolate* isolate_;
    static bool initialize_called_;
    static v8::base::Atomic32 isolate_used_;
  };
  
  // Switches between all the Api tests using the threading support.
  // In order to get a surprising but repeatable pattern of thread
  // switching it has extra semaphores to control the order in which
  // the tests alternate, not relying solely on the big V8 lock.
  //
  // A test is augmented with calls to ApiTestFuzzer::Fuzz() in its
  // callbacks.  This will have no effect when we are not running the
  // thread fuzzing test.  In the thread fuzzing test it will
  // pseudorandomly select a successor thread and switch execution
  // to that thread, suspending the current test.
  class ApiTestFuzzer: public v8::base::Thread {
   public:
    void CallTest();
  
    // The ApiTestFuzzer is also a Thread, so it has a Run method.
    void Run() override;
  
    enum PartOfTest {
      FIRST_PART,
      SECOND_PART,
      THIRD_PART,
      FOURTH_PART,
      FIFTH_PART,
      SIXTH_PART,
      SEVENTH_PART,
      EIGHTH_PART,
      LAST_PART = EIGHTH_PART
    };
  
    static void SetUp(PartOfTest part);
    static void RunAllTests();
    static void TearDown();
    // This method switches threads if we are running the Threading test.
    // Otherwise it does nothing.
    static void Fuzz();
  
   private:
    explicit ApiTestFuzzer(int num)
        : Thread(Options("ApiTestFuzzer")),
          test_number_(num),
          gate_(0),
          active_(true) {}
    ~ApiTestFuzzer() override = default;
  
    static bool fuzzing_;
    static int tests_being_run_;
    static int current_;
    static int active_tests_;
    static bool NextThread();
    int test_number_;
    v8::base::Semaphore gate_;
    bool active_;
    void ContextSwitch();
    static int GetNextTestNumber();
    static v8::base::Semaphore all_tests_done_;
  };
  
  
  #define THREADED_TEST(Name)                                          \
    static void Test##Name();                                          \
    RegisterThreadedTest register_##Name(Test##Name, #Name);           \
    /* */ TEST(Name)
  
  class RegisterThreadedTest {
   public:
    explicit RegisterThreadedTest(CcTest::TestFunction* callback,
                                  const char* name)
        : fuzzer_(nullptr), callback_(callback), name_(name) {
      prev_ = first_;
      first_ = this;
      count_++;
    }
    static int count() { return count_; }
    static RegisterThreadedTest* nth(int i) {
      CHECK(i < count());
      RegisterThreadedTest* current = first_;
      while (i > 0) {
        i--;
        current = current->prev_;
      }
      return current;
    }
    CcTest::TestFunction* callback() { return callback_; }
    ApiTestFuzzer* fuzzer_;
    const char* name() { return name_; }
  
   private:
    static RegisterThreadedTest* first_;
    static int count_;
    CcTest::TestFunction* callback_;
    RegisterThreadedTest* prev_;
    const char* name_;
  };
  
  // A LocalContext holds a reference to a v8::Context.
  class LocalContext {
   public:
    LocalContext(v8::Isolate* isolate,
                 v8::ExtensionConfiguration* extensions = nullptr,
                 v8::Local<v8::ObjectTemplate> global_template =
                     v8::Local<v8::ObjectTemplate>(),
                 v8::Local<v8::Value> global_object = v8::Local<v8::Value>()) {
      Initialize(isolate, extensions, global_template, global_object);
    }
  
    LocalContext(v8::ExtensionConfiguration* extensions = nullptr,
                 v8::Local<v8::ObjectTemplate> global_template =
                     v8::Local<v8::ObjectTemplate>(),
                 v8::Local<v8::Value> global_object = v8::Local<v8::Value>()) {
      Initialize(CcTest::isolate(), extensions, global_template, global_object);
    }
  
    virtual ~LocalContext();
  
    v8::Context* operator->() {
      return *reinterpret_cast<v8::Context**>(&context_);
    }
    v8::Context* operator*() { return operator->(); }
    bool IsReady() { return !context_.IsEmpty(); }
  
    v8::Local<v8::Context> local() {
      return v8::Local<v8::Context>::New(isolate_, context_);
    }
  
   private:
    void Initialize(v8::Isolate* isolate, v8::ExtensionConfiguration* extensions,
                    v8::Local<v8::ObjectTemplate> global_template,
                    v8::Local<v8::Value> global_object);
  
    v8::Persistent<v8::Context> context_;
    v8::Isolate* isolate_;
  };
  
  
  static inline uint16_t* AsciiToTwoByteString(const char* source) {
    int array_length = i::StrLength(source) + 1;
    uint16_t* converted = i::NewArray<uint16_t>(array_length);
    for (int i = 0; i < array_length; i++) converted[i] = source[i];
    return converted;
  }
  
  template <typename T>
  static inline i::Handle<T> GetGlobal(const char* name) {
    i::Isolate* isolate = CcTest::i_isolate();
    i::Handle<i::String> str_name =
        isolate->factory()->InternalizeUtf8String(name);
  
    i::Handle<i::Object> value =
        i::Object::GetProperty(isolate, isolate->global_object(), str_name)
            .ToHandleChecked();
    return i::Handle<T>::cast(value);
  }
  
  static inline v8::Local<v8::Boolean> v8_bool(bool val) {
    return v8::Boolean::New(v8::Isolate::GetCurrent(), val);
  }
  
  static inline v8::Local<v8::Value> v8_num(double x) {
    return v8::Number::New(v8::Isolate::GetCurrent(), x);
  }
  
  static inline v8::Local<v8::Integer> v8_int(int32_t x) {
    return v8::Integer::New(v8::Isolate::GetCurrent(), x);
  }
  
  static inline v8::Local<v8::String> v8_str(const char* x) {
    return v8::String::NewFromUtf8(v8::Isolate::GetCurrent(), x,
                                   v8::NewStringType::kNormal)
        .ToLocalChecked();
  }
  
  
  static inline v8::Local<v8::String> v8_str(v8::Isolate* isolate,
                                             const char* x) {
    return v8::String::NewFromUtf8(isolate, x, v8::NewStringType::kNormal)
        .ToLocalChecked();
  }
  
  
  static inline v8::Local<v8::Symbol> v8_symbol(const char* name) {
    return v8::Symbol::New(v8::Isolate::GetCurrent(), v8_str(name));
  }
  
  
  static inline v8::Local<v8::Script> v8_compile(v8::Local<v8::String> x) {
    v8::Local<v8::Script> result;
    if (v8::Script::Compile(v8::Isolate::GetCurrent()->GetCurrentContext(), x)
            .ToLocal(&result)) {
      return result;
    }
    return v8::Local<v8::Script>();
  }
  
  
  static inline v8::Local<v8::Script> v8_compile(const char* x) {
    return v8_compile(v8_str(x));
  }
  
  
  static inline int32_t v8_run_int32value(v8::Local<v8::Script> script) {
    v8::Local<v8::Context> context = CcTest::isolate()->GetCurrentContext();
    return script->Run(context).ToLocalChecked()->Int32Value(context).FromJust();
  }
  
  static inline v8::Local<v8::Script> CompileWithOrigin(
      v8::Local<v8::String> source, v8::Local<v8::String> origin_url,
      v8::Local<v8::Boolean> is_shared_cross_origin) {
    v8::ScriptOrigin origin(origin_url, v8::Local<v8::Integer>(),
                            v8::Local<v8::Integer>(), is_shared_cross_origin);
    v8::ScriptCompiler::Source script_source(source, origin);
    return v8::ScriptCompiler::Compile(
               v8::Isolate::GetCurrent()->GetCurrentContext(), &script_source)
        .ToLocalChecked();
  }
  
  static inline v8::Local<v8::Script> CompileWithOrigin(
      v8::Local<v8::String> source, const char* origin_url,
      bool is_shared_cross_origin) {
    return CompileWithOrigin(source, v8_str(origin_url),
                             v8_bool(is_shared_cross_origin));
  }
  
  static inline v8::Local<v8::Script> CompileWithOrigin(
      const char* source, const char* origin_url, bool is_shared_cross_origin) {
    return CompileWithOrigin(v8_str(source), v8_str(origin_url),
                             v8_bool(is_shared_cross_origin));
  }
  
  // Helper functions that compile and run the source.
  static inline v8::MaybeLocal<v8::Value> CompileRun(
      v8::Local<v8::Context> context, const char* source) {
    return v8::Script::Compile(context, v8_str(source))
        .ToLocalChecked()
        ->Run(context);
  }
  
  
  static inline v8::Local<v8::Value> CompileRunChecked(v8::Isolate* isolate,
                                                       const char* source) {
    v8::Local<v8::String> source_string =
        v8::String::NewFromUtf8(isolate, source, v8::NewStringType::kNormal)
            .ToLocalChecked();
    v8::Local<v8::Context> context = isolate->GetCurrentContext();
    v8::Local<v8::Script> script =
        v8::Script::Compile(context, source_string).ToLocalChecked();
    return script->Run(context).ToLocalChecked();
  }
  
  
  static inline v8::Local<v8::Value> CompileRun(v8::Local<v8::String> source) {
    v8::Local<v8::Value> result;
    if (v8_compile(source)
            ->Run(v8::Isolate::GetCurrent()->GetCurrentContext())
            .ToLocal(&result)) {
      return result;
    }
    return v8::Local<v8::Value>();
  }
  
  
  // Helper functions that compile and run the source.
  static inline v8::Local<v8::Value> CompileRun(const char* source) {
    return CompileRun(v8_str(source));
  }
  
  
  static inline v8::Local<v8::Value> CompileRun(
      v8::Local<v8::Context> context, v8::ScriptCompiler::Source* script_source,
      v8::ScriptCompiler::CompileOptions options) {
    v8::Local<v8::Value> result;
    if (v8::ScriptCompiler::Compile(context, script_source, options)
            .ToLocalChecked()
            ->Run(context)
            .ToLocal(&result)) {
      return result;
    }
    return v8::Local<v8::Value>();
  }
  
  
  // Helper functions that compile and run the source with given origin.
  static inline v8::Local<v8::Value> CompileRunWithOrigin(const char* source,
                                                          const char* origin_url,
                                                          int line_number,
                                                          int column_number) {
    v8::Isolate* isolate = v8::Isolate::GetCurrent();
    v8::Local<v8::Context> context = isolate->GetCurrentContext();
    v8::ScriptOrigin origin(v8_str(origin_url),
                            v8::Integer::New(isolate, line_number),
                            v8::Integer::New(isolate, column_number));
    v8::ScriptCompiler::Source script_source(v8_str(source), origin);
    return CompileRun(context, &script_source,
                      v8::ScriptCompiler::CompileOptions());
  }
  
  
  static inline v8::Local<v8::Value> CompileRunWithOrigin(
      v8::Local<v8::String> source, const char* origin_url) {
    v8::Isolate* isolate = v8::Isolate::GetCurrent();
    v8::Local<v8::Context> context = isolate->GetCurrentContext();
    v8::ScriptCompiler::Source script_source(
        source, v8::ScriptOrigin(v8_str(origin_url)));
    return CompileRun(context, &script_source,
                      v8::ScriptCompiler::CompileOptions());
  }
  
  
  static inline v8::Local<v8::Value> CompileRunWithOrigin(
      const char* source, const char* origin_url) {
    return CompileRunWithOrigin(v8_str(source), origin_url);
  }
  
  // Takes a JSFunction and runs it through the test version of the optimizing
  // pipeline, allocating the temporary compilation artifacts in a given Zone.
  // For possible {flags} values, look at OptimizedCompilationInfo::Flag.
  // If passed a non-null pointer for {broker}, outputs the JSHeapBroker to it.
  i::Handle<i::JSFunction> Optimize(
      i::Handle<i::JSFunction> function, i::Zone* zone, i::Isolate* isolate,
      uint32_t flags, i::compiler::JSHeapBroker** out_broker = nullptr);
  
  static inline void ExpectString(const char* code, const char* expected) {
    v8::Local<v8::Value> result = CompileRun(code);
    CHECK(result->IsString());
    v8::String::Utf8Value utf8(v8::Isolate::GetCurrent(), result);
    CHECK_EQ(0, strcmp(expected, *utf8));
  }
  
  
  static inline void ExpectInt32(const char* code, int expected) {
    v8::Local<v8::Value> result = CompileRun(code);
    CHECK(result->IsInt32());
    CHECK_EQ(expected,
             result->Int32Value(v8::Isolate::GetCurrent()->GetCurrentContext())
                 .FromJust());
  }
  
  
  static inline void ExpectBoolean(const char* code, bool expected) {
    v8::Local<v8::Value> result = CompileRun(code);
    CHECK(result->IsBoolean());
    CHECK_EQ(expected, result->BooleanValue(v8::Isolate::GetCurrent()));
  }
  
  
  static inline void ExpectTrue(const char* code) {
    ExpectBoolean(code, true);
  }
  
  
  static inline void ExpectFalse(const char* code) {
    ExpectBoolean(code, false);
  }
  
  
  static inline void ExpectObject(const char* code,
                                  v8::Local<v8::Value> expected) {
    v8::Local<v8::Value> result = CompileRun(code);
    CHECK(result->SameValue(expected));
  }
  
  
  static inline void ExpectUndefined(const char* code) {
    v8::Local<v8::Value> result = CompileRun(code);
    CHECK(result->IsUndefined());
  }
  
  
  static inline void ExpectNull(const char* code) {
    v8::Local<v8::Value> result = CompileRun(code);
    CHECK(result->IsNull());
  }
  
  
  static inline void CheckDoubleEquals(double expected, double actual) {
    const double kEpsilon = 1e-10;
    CHECK_LE(expected, actual + kEpsilon);
    CHECK_GE(expected, actual - kEpsilon);
  }
  
  static v8::debug::DebugDelegate dummy_delegate;
  
  static inline void EnableDebugger(v8::Isolate* isolate) {
    v8::debug::SetDebugDelegate(isolate, &dummy_delegate);
  }
  
  
  static inline void DisableDebugger(v8::Isolate* isolate) {
    v8::debug::SetDebugDelegate(isolate, nullptr);
  }
  
  
  static inline void EmptyMessageQueues(v8::Isolate* isolate) {
    while (v8::platform::PumpMessageLoop(v8::internal::V8::GetCurrentPlatform(),
                                         isolate)) {
    }
  }
  
  class InitializedHandleScopeImpl;
  
  class InitializedHandleScope {
   public:
    InitializedHandleScope();
    ~InitializedHandleScope();
  
    // Prefixing the below with main_ reduces a lot of naming clashes.
    i::Isolate* main_isolate() { return main_isolate_; }
  
   private:
    i::Isolate* main_isolate_;
    std::unique_ptr<InitializedHandleScopeImpl> initialized_handle_scope_impl_;
  };
  
  class HandleAndZoneScope : public InitializedHandleScope {
   public:
    HandleAndZoneScope();
    ~HandleAndZoneScope();
  
    // Prefixing the below with main_ reduces a lot of naming clashes.
    i::Zone* main_zone() { return main_zone_.get(); }
  
   private:
    v8::internal::AccountingAllocator allocator_;
    std::unique_ptr<i::Zone> main_zone_;
  };
  
  class StaticOneByteResource : public v8::String::ExternalOneByteStringResource {
   public:
    explicit StaticOneByteResource(const char* data) : data_(data) {}
  
    ~StaticOneByteResource() override = default;
  
    const char* data() const override { return data_; }
  
    size_t length() const override { return strlen(data_); }
  
   private:
    const char* data_;
  };
  
  class ManualGCScope {
   public:
    ManualGCScope()
        : flag_concurrent_marking_(i::FLAG_concurrent_marking),
          flag_concurrent_sweeping_(i::FLAG_concurrent_sweeping),
          flag_stress_incremental_marking_(i::FLAG_stress_incremental_marking),
          flag_parallel_marking_(i::FLAG_parallel_marking),
          flag_detect_ineffective_gcs_near_heap_limit_(
              i::FLAG_detect_ineffective_gcs_near_heap_limit) {
      i::FLAG_concurrent_marking = false;
      i::FLAG_concurrent_sweeping = false;
      i::FLAG_stress_incremental_marking = false;
      // Parallel marking has a dependency on concurrent marking.
      i::FLAG_parallel_marking = false;
      i::FLAG_detect_ineffective_gcs_near_heap_limit = false;
    }
    ~ManualGCScope() {
      i::FLAG_concurrent_marking = flag_concurrent_marking_;
      i::FLAG_concurrent_sweeping = flag_concurrent_sweeping_;
      i::FLAG_stress_incremental_marking = flag_stress_incremental_marking_;
      i::FLAG_parallel_marking = flag_parallel_marking_;
      i::FLAG_detect_ineffective_gcs_near_heap_limit =
          flag_detect_ineffective_gcs_near_heap_limit_;
    }
  
   private:
    bool flag_concurrent_marking_;
    bool flag_concurrent_sweeping_;
    bool flag_stress_incremental_marking_;
    bool flag_parallel_marking_;
    bool flag_detect_ineffective_gcs_near_heap_limit_;
  };
  
  // This is an abstract base class that can be overridden to implement a test
  // platform. It delegates all operations to a given platform at the time
  // of construction.
  class TestPlatform : public v8::Platform {
   public:
    // v8::Platform implementation.
    v8::PageAllocator* GetPageAllocator() override {
      return old_platform_->GetPageAllocator();
    }
  
    void OnCriticalMemoryPressure() override {
      old_platform_->OnCriticalMemoryPressure();
    }
  
    bool OnCriticalMemoryPressure(size_t length) override {
      return old_platform_->OnCriticalMemoryPressure(length);
    }
  
    int NumberOfWorkerThreads() override {
      return old_platform_->NumberOfWorkerThreads();
    }
  
    std::shared_ptr<v8::TaskRunner> GetForegroundTaskRunner(
        v8::Isolate* isolate) override {
      return old_platform_->GetForegroundTaskRunner(isolate);
    }
  
    void CallOnWorkerThread(std::unique_ptr<v8::Task> task) override {
      old_platform_->CallOnWorkerThread(std::move(task));
    }
  
    void CallDelayedOnWorkerThread(std::unique_ptr<v8::Task> task,
                                   double delay_in_seconds) override {
      old_platform_->CallDelayedOnWorkerThread(std::move(task), delay_in_seconds);
    }
  
    void CallOnForegroundThread(v8::Isolate* isolate, v8::Task* task) override {
      // This is a deprecated function and should not be called anymore.
      UNREACHABLE();
    }
  
    void CallDelayedOnForegroundThread(v8::Isolate* isolate, v8::Task* task,
                                       double delay_in_seconds) override {
      // This is a deprecated function and should not be called anymore.
      UNREACHABLE();
    }
  
    double MonotonicallyIncreasingTime() override {
      return old_platform_->MonotonicallyIncreasingTime();
    }
  
    double CurrentClockTimeMillis() override {
      return old_platform_->CurrentClockTimeMillis();
    }
  
    void CallIdleOnForegroundThread(v8::Isolate* isolate,
                                    v8::IdleTask* task) override {
      // This is a deprecated function and should not be called anymore.
      UNREACHABLE();
    }
  
    bool IdleTasksEnabled(v8::Isolate* isolate) override {
      return old_platform_->IdleTasksEnabled(isolate);
    }
  
    v8::TracingController* GetTracingController() override {
      return old_platform_->GetTracingController();
    }
  
   protected:
    TestPlatform() : old_platform_(i::V8::GetCurrentPlatform()) {}
    ~TestPlatform() override { i::V8::SetPlatformForTesting(old_platform_); }
  
    v8::Platform* old_platform() const { return old_platform_; }
  
   private:
    v8::Platform* old_platform_;
  
    DISALLOW_COPY_AND_ASSIGN(TestPlatform);
  };
  
  #endif  // ifndef CCTEST_H_
  