// 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 "v8.h"

#ifndef TEST
#define TEST(Name)                                                       \
  static void Test##Name();                                              \
  CcTest register_test_##Name(Test##Name, __FILE__, #Name, NULL, true);  \
  static void Test##Name()
#endif

#ifndef DEPENDENT_TEST
#define DEPENDENT_TEST(Name, Dep)                                        \
  static void Test##Name();                                              \
  CcTest register_test_##Name(Test##Name, __FILE__, #Name, #Dep, true);  \
  static void Test##Name()
#endif

#ifndef DISABLED_TEST
#define DISABLED_TEST(Name)                                              \
  static void Test##Name();                                              \
  CcTest register_test_##Name(Test##Name, __FILE__, #Name, NULL, false); \
  static void Test##Name()
#endif

class CcTest {
 public:
  typedef void (TestFunction)();
  CcTest(TestFunction* callback, const char* file, const char* name,
         const char* dependency, bool enabled);
  void Run() { callback_(); }
  static int test_count();
  static CcTest* last() { return last_; }
  CcTest* prev() { return prev_; }
  const char* file() { return file_; }
  const char* name() { return name_; }
  const char* dependency() { return dependency_; }
  bool enabled() { return enabled_; }
 private:
  TestFunction* callback_;
  const char* file_;
  const char* name_;
  const char* dependency_;
  bool enabled_;
  static CcTest* last_;
  CcTest* prev_;
};

// 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::internal::Thread {
 public:
  void CallTest();
  explicit ApiTestFuzzer(v8::internal::Isolate* isolate, int num)
      : Thread(isolate, "ApiTestFuzzer"),
        test_number_(num),
        gate_(v8::internal::OS::CreateSemaphore(0)),
        active_(true) {
  }
  ~ApiTestFuzzer() { delete gate_; }

  // The ApiTestFuzzer is also a Thread, so it has a Run method.
  virtual void Run();

  enum PartOfTest { FIRST_PART,
                    SECOND_PART,
                    THIRD_PART,
                    FOURTH_PART,
                    LAST_PART = FOURTH_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:
  static bool fuzzing_;
  static int tests_being_run_;
  static int current_;
  static int active_tests_;
  static bool NextThread();
  int test_number_;
  v8::internal::Semaphore* gate_;
  bool active_;
  void ContextSwitch();
  static int GetNextTestNumber();
  static v8::internal::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_(NULL), 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::ExtensionConfiguration* extensions = 0,
               v8::Handle<v8::ObjectTemplate> global_template =
                   v8::Handle<v8::ObjectTemplate>(),
               v8::Handle<v8::Value> global_object = v8::Handle<v8::Value>())
    : context_(v8::Context::New(extensions, global_template, global_object)) {
    context_->Enter();
  }

  virtual ~LocalContext() {
    context_->Exit();
    context_.Dispose();
  }

  v8::Context* operator->() { return *context_; }
  v8::Context* operator*() { return *context_; }
  bool IsReady() { return !context_.IsEmpty(); }

  v8::Local<v8::Context> local() {
    return v8::Local<v8::Context>::New(context_);
  }

 private:
  v8::Persistent<v8::Context> context_;
};


static inline v8::Local<v8::Value> v8_num(double x) {
  return v8::Number::New(x);
}


static inline v8::Local<v8::String> v8_str(const char* x) {
  return v8::String::New(x);
}


static inline v8::Local<v8::Script> v8_compile(const char* x) {
  return v8::Script::Compile(v8_str(x));
}


// Helper function that compiles and runs the source.
static inline v8::Local<v8::Value> CompileRun(const char* source) {
  return v8::Script::Compile(v8::String::New(source))->Run();
}


#endif  // ifndef CCTEST_H_