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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "jsapi.h"

#include "jsapi-tests/tests.h"

using namespace JS;

static bool executor_called = false;

static bool PromiseExecutor(JSContext* cx, unsigned argc, Value* vp) {
#ifdef DEBUG
  CallArgs args = CallArgsFromVp(argc, vp);
#endif  // DEBUG
  MOZ_ASSERT(args.length() == 2);
  MOZ_ASSERT(args[0].toObject().is<JSFunction>());
  MOZ_ASSERT(args[1].toObject().is<JSFunction>());

  executor_called = true;
  return true;
}

static JSObject* CreatePromise(JSContext* cx) {
  RootedFunction executor(
      cx, JS_NewFunction(cx, PromiseExecutor, 2, 0, "executor"));
  if (!executor) {
    return nullptr;
  }
  return JS::NewPromiseObject(cx, executor);
}

BEGIN_TEST(testPromise_NewPromise) {
  RootedObject promise(cx, CreatePromise(cx));
  CHECK(promise);
  CHECK(executor_called);

  return true;
}
END_TEST(testPromise_NewPromise)

BEGIN_TEST(testPromise_GetPromiseState) {
  RootedObject promise(cx, CreatePromise(cx));
  if (!promise) {
    return false;
  }

  CHECK(JS::GetPromiseState(promise) == JS::PromiseState::Pending);

  return true;
}
END_TEST(testPromise_GetPromiseState)

BEGIN_TEST(testPromise_ResolvePromise) {
  RootedObject promise(cx, CreatePromise(cx));
  if (!promise) {
    return false;
  }

  RootedValue result(cx);
  result.setInt32(42);
  JS::ResolvePromise(cx, promise, result);

  CHECK(JS::GetPromiseState(promise) == JS::PromiseState::Fulfilled);

  return true;
}
END_TEST(testPromise_ResolvePromise)

BEGIN_TEST(testPromise_RejectPromise) {
  RootedObject promise(cx, CreatePromise(cx));
  if (!promise) {
    return false;
  }

  RootedValue result(cx);
  result.setInt32(42);
  JS::RejectPromise(cx, promise, result);

  CHECK(JS::GetPromiseState(promise) == JS::PromiseState::Rejected);

  return true;
}
END_TEST(testPromise_RejectPromise)

static bool thenHandler_called = false;

static bool PromiseThenHandler(JSContext* cx, unsigned argc, Value* vp) {
#ifdef DEBUG
  CallArgs args = CallArgsFromVp(argc, vp);
#endif  // DEBUG
  MOZ_ASSERT(args.length() == 1);

  thenHandler_called = true;
  return true;
}

static bool catchHandler_called = false;

static bool PromiseCatchHandler(JSContext* cx, unsigned argc, Value* vp) {
#ifdef DEBUG
  CallArgs args = CallArgsFromVp(argc, vp);
#endif  // DEBUG
  MOZ_ASSERT(args.length() == 1);

  catchHandler_called = true;
  return true;
}

BEGIN_TEST(testPromise_PromiseThen) {
  RootedObject promise(cx, CreatePromise(cx));
  if (!promise) {
    return false;
  }

  RootedFunction thenHandler(
      cx, JS_NewFunction(cx, PromiseThenHandler, 1, 0, "thenHandler"));
  if (!thenHandler) {
    return false;
  }
  RootedFunction catchHandler(
      cx, JS_NewFunction(cx, PromiseCatchHandler, 1, 0, "catchHandler"));
  if (!catchHandler) {
    return false;
  }
  JS::AddPromiseReactions(cx, promise, thenHandler, catchHandler);

  RootedValue result(cx);
  result.setInt32(42);
  JS::ResolvePromise(cx, promise, result);
  js::RunJobs(cx);

  CHECK(thenHandler_called);

  return true;
}
END_TEST(testPromise_PromiseThen)

BEGIN_TEST(testPromise_PromiseCatch) {
  RootedObject promise(cx, CreatePromise(cx));
  if (!promise) {
    return false;
  }

  RootedFunction thenHandler(
      cx, JS_NewFunction(cx, PromiseThenHandler, 1, 0, "thenHandler"));
  if (!thenHandler) {
    return false;
  }
  RootedFunction catchHandler(
      cx, JS_NewFunction(cx, PromiseCatchHandler, 1, 0, "catchHandler"));
  if (!catchHandler) {
    return false;
  }
  JS::AddPromiseReactions(cx, promise, thenHandler, catchHandler);

  RootedValue result(cx);
  result.setInt32(42);
  JS::RejectPromise(cx, promise, result);
  js::RunJobs(cx);

  CHECK(catchHandler_called);

  return true;
}
END_TEST(testPromise_PromiseCatch)