TEST_F(ReadableStreamTest, CloseWhenReadable)
{
    ScriptState::Scope scope(scriptState());
    ExceptionState exceptionState(ExceptionState::ConstructionContext, "property", "interface", scriptState()->context()->Global(), isolate());
    StringStream* stream = construct();

    EXPECT_TRUE(stream->enqueue("hello"));
    EXPECT_TRUE(stream->enqueue("bye"));
    stream->close();
    EXPECT_FALSE(stream->enqueue("should be ignored"));

    EXPECT_EQ(ReadableStream::Readable, stream->stateInternal());
    EXPECT_FALSE(stream->isPulling());
    EXPECT_TRUE(stream->isDraining());

    stream->read(scriptState());

    isolate()->RunMicrotasks();

    EXPECT_EQ(ReadableStream::Readable, stream->stateInternal());
    EXPECT_FALSE(stream->isPulling());
    EXPECT_TRUE(stream->isDraining());

    stream->read(scriptState());

    EXPECT_EQ(ReadableStream::Closed, stream->stateInternal());
    EXPECT_FALSE(stream->isPulling());
    EXPECT_TRUE(stream->isDraining());
}
TEST_F(ReadableStreamTest, ReadQueue)
{
    ScriptState::Scope scope(scriptState());
    ExceptionState exceptionState(ExceptionState::ConstructionContext, "property", "interface", scriptState()->context()->Global(), isolate());
    StringStream* stream = construct();
    Checkpoint checkpoint;

    {
        InSequence s;
        EXPECT_CALL(checkpoint, Call(0));
        EXPECT_CALL(*m_underlyingSource, pullSource()).Times(1);
        EXPECT_CALL(checkpoint, Call(1));
    }

    Deque<std::pair<String, size_t>> queue;

    EXPECT_TRUE(stream->enqueue("hello"));
    EXPECT_TRUE(stream->enqueue("bye"));
    EXPECT_EQ(ReadableStream::Readable, stream->stateInternal());
    EXPECT_FALSE(stream->isPulling());

    checkpoint.Call(0);
    EXPECT_FALSE(stream->isDisturbed());
    stream->readInternal(queue);
    EXPECT_TRUE(stream->isDisturbed());
    checkpoint.Call(1);
    ASSERT_EQ(2u, queue.size());

    EXPECT_EQ(std::make_pair(String("hello"), static_cast<size_t>(5)), queue[0]);
    EXPECT_EQ(std::make_pair(String("bye"), static_cast<size_t>(3)), queue[1]);

    EXPECT_EQ(ReadableStream::Readable, stream->stateInternal());
    EXPECT_TRUE(stream->isPulling());
    EXPECT_FALSE(stream->isDraining());
}
TEST_F(ReadableStreamTest, Start)
{
    ScriptState::Scope scope(scriptState());
    ExceptionState exceptionState(ExceptionState::ConstructionContext, "property", "interface", scriptState()->context()->Global(), isolate());
    Checkpoint checkpoint;
    {
        InSequence s;
        EXPECT_CALL(checkpoint, Call(0));
        EXPECT_CALL(*m_underlyingSource, pullSource()).Times(1);
        EXPECT_CALL(checkpoint, Call(1));
    }

    StringStream* stream = new StringStream(m_underlyingSource);
    EXPECT_FALSE(exceptionState.hadException());
    EXPECT_FALSE(stream->isStarted());
    EXPECT_FALSE(stream->isDraining());
    EXPECT_FALSE(stream->isPulling());
    EXPECT_FALSE(stream->isDisturbed());
    EXPECT_EQ(stream->stateInternal(), ReadableStream::Readable);

    checkpoint.Call(0);
    stream->didSourceStart();
    checkpoint.Call(1);

    EXPECT_TRUE(stream->isStarted());
    EXPECT_FALSE(stream->isDraining());
    EXPECT_TRUE(stream->isPulling());
    EXPECT_EQ(stream->stateInternal(), ReadableStream::Readable);

    // We need to call |error| in order to make
    // ActiveDOMObject::hasPendingActivity return false.
    stream->error(DOMException::create(AbortError, "done"));
}
TEST_F(ReadableStreamTest, StrictStrategy)
{
    ScriptState::Scope scope(scriptState());
    ExceptionState exceptionState(ExceptionState::ConstructionContext, "property", "interface", scriptState()->context()->Global(), isolate());
    Checkpoint checkpoint;
    {
        InSequence s;
        EXPECT_CALL(checkpoint, Call(0));
        EXPECT_CALL(checkpoint, Call(1));
        EXPECT_CALL(*m_underlyingSource, pullSource());
        EXPECT_CALL(checkpoint, Call(2));
        EXPECT_CALL(checkpoint, Call(3));
        EXPECT_CALL(*m_underlyingSource, pullSource());
        EXPECT_CALL(checkpoint, Call(4));
        EXPECT_CALL(checkpoint, Call(5));
        EXPECT_CALL(checkpoint, Call(6));
        EXPECT_CALL(checkpoint, Call(7));
        EXPECT_CALL(checkpoint, Call(8));
        EXPECT_CALL(checkpoint, Call(9));
        EXPECT_CALL(*m_underlyingSource, pullSource());
    }
    StringStream* stream = new StringStream(m_underlyingSource, new StringStream::StrictStrategy);
    ReadableStreamReader* reader = stream->getReader(scriptState()->executionContext(), exceptionState);

    checkpoint.Call(0);
    stream->didSourceStart();

    checkpoint.Call(1);
    EXPECT_FALSE(stream->isPulling());
    reader->read(scriptState());
    EXPECT_TRUE(stream->isPulling());
    checkpoint.Call(2);
    stream->enqueue("hello");
    EXPECT_FALSE(stream->isPulling());
    checkpoint.Call(3);
    reader->read(scriptState());
    EXPECT_TRUE(stream->isPulling());
    checkpoint.Call(4);
    reader->read(scriptState());
    EXPECT_TRUE(stream->isPulling());
    checkpoint.Call(5);
    stream->enqueue("hello");
    EXPECT_FALSE(stream->isPulling());
    checkpoint.Call(6);
    stream->enqueue("hello");
    EXPECT_FALSE(stream->isPulling());
    checkpoint.Call(7);
    stream->enqueue("hello");
    EXPECT_FALSE(stream->isPulling());
    checkpoint.Call(8);
    reader->read(scriptState());
    EXPECT_FALSE(stream->isPulling());
    checkpoint.Call(9);
    reader->read(scriptState());
    EXPECT_TRUE(stream->isPulling());

    stream->error(DOMException::create(AbortError, "done"));
}
TEST_F(ReadableStreamTest, StartFail)
{
    ScriptState::Scope scope(scriptState());
    ExceptionState exceptionState(ExceptionState::ConstructionContext, "property", "interface", scriptState()->context()->Global(), isolate());
    StringStream* stream = new StringStream(m_underlyingSource);
    EXPECT_FALSE(exceptionState.hadException());
    EXPECT_FALSE(stream->isStarted());
    EXPECT_FALSE(stream->isDraining());
    EXPECT_FALSE(stream->isPulling());
    EXPECT_EQ(stream->stateInternal(), ReadableStream::Readable);

    stream->error(DOMException::create(NotFoundError));

    EXPECT_FALSE(stream->isStarted());
    EXPECT_FALSE(stream->isDraining());
    EXPECT_FALSE(stream->isPulling());
    EXPECT_EQ(stream->stateInternal(), ReadableStream::Errored);
}