• BoundedQueueKataStepTwo

Kata Step Two

• Our second test verifies that when a BoundedQueue is created, it tells the Consumer not to start grabbing items yet.

BoundedQueueTest.cpp

TEST(BoundedQueueTest, CreatePausesConsumer) {
        MockQueueControl producer, consumer;
        EXPECT_CALL(consumer, Pause());
        BoundedQueue<int> q(producer, consumer);
}

See if you can get this to compile, or read on:

We need to add void Pause() to our mock, and our interface:

BoundedQueueTest.cpp

class MockQueueControl : public QueueControl {
public:
        ...
        MOCK_METHOD0(Pause, void());
};

QueueControl.h

class QueueControl {
public:
        ...
        virtual void Pause() = 0;
};

And modify BoundedQueue's constructor, because we now know we also want a Consumer:

BoundedQueue.h

        BoundedQueue(QueueControl& producer, QueueControl& consumer) {
                producer.Resume();
        }

Finally, we need to modify our first test to call the new constructor:

BoundedQueueTest.cpp

TEST(BoundedQueueTest, CreateResumesProducer) {
        MockQueueControl producer, consumer;
        EXPECT_CALL(producer, Resume());
        BoundedQueue<int> q(producer, consumer);
}



Now we should be able to compile and run tests, and see a new failing test.

See if you can make the test pass, or read on:

All we have to do to make the test pass is call Pause():

BoundedQueue.h

        BoundedQueue(QueueControl& producer, QueueControl& consumer) {
                producer.Resume();
                consumer.Pause();
        }

Green bar!

Go on to BoundedQueueKataStepThree.... or go back