src/base/callback.test.cc

/*
 * Copyright (c) 2019 The Regents of the University of California
 * All rights reserved
 *
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 * property including but not limited to intellectual property relating
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 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
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 * notice, this list of conditions and the following disclaimer in the
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#include <gtest/gtest.h>

#include "base/callback.hh"

class CallbackImpl : public Callback
{
    public:
        bool processed = false;
        void process()
        {
            processed = true;
        }
};

class MockClass
{
    public:
        bool methodExecuted = false;
        void method()
        {
            methodExecuted = true;
        }
};

TEST(CallbackQueueTest, GetName)
{
    CallbackQueue callbackQueue;
    EXPECT_EQ("CallbackQueue", callbackQueue.name());
}

TEST(CallbackQueueTest, IsEmpty)
{
    CallbackQueue callbackQueue;
    EXPECT_TRUE(callbackQueue.empty());
}

TEST(CallbackQueueTest, IsNotEmpty)
{
    CallbackQueue callbackQueue;
    CallbackImpl impl;
    callbackQueue.add(&impl);
    EXPECT_FALSE(callbackQueue.empty());
}

TEST(CallbackQueueTest, AddOneAndProcess)
{
    CallbackQueue callbackQueue;
    CallbackImpl impl;
    callbackQueue.add(&impl);
    EXPECT_FALSE(impl.processed);
    callbackQueue.process();
    EXPECT_TRUE(impl.processed);
    // Processing a queue does not clear it.
    EXPECT_FALSE(callbackQueue.empty());
}

TEST(CallbackQueueTest, AddManyAndProcess)
{
    CallbackQueue callbackQueue;
    CallbackImpl impl1;
    CallbackImpl impl2;
    CallbackImpl impl3;
    CallbackImpl impl4;
    callbackQueue.add(&impl1);
    callbackQueue.add(&impl2);
    callbackQueue.add(&impl3);
    callbackQueue.add(&impl4);
    EXPECT_FALSE(impl1.processed);
    EXPECT_FALSE(impl2.processed);
    EXPECT_FALSE(impl3.processed);
    EXPECT_FALSE(impl4.processed);
    callbackQueue.process();
    EXPECT_TRUE(impl1.processed);
    EXPECT_TRUE(impl2.processed);
    EXPECT_TRUE(impl3.processed);
    EXPECT_TRUE(impl4.processed);
    EXPECT_FALSE(callbackQueue.empty());
}

TEST(CallbackQueueTest, ClearQueue)
{
    CallbackQueue callbackQueue;
    CallbackImpl callbackImpl;
    callbackQueue.add(&callbackImpl);
    EXPECT_FALSE(callbackQueue.empty());
    callbackQueue.clear();
    EXPECT_TRUE(callbackQueue.empty());
}

TEST(CallbackQueueTest, MakeCallbackAddByReference)
{
    CallbackQueue callbackQueue;
    MockClass mockClass;
    EXPECT_FALSE(mockClass.methodExecuted);
    callbackQueue.add<MockClass, &MockClass::method>(mockClass);
    callbackQueue.process();
    EXPECT_TRUE(mockClass.methodExecuted);
    EXPECT_FALSE(callbackQueue.empty());
}

TEST(CallbackQueueTest, MakeCallbackAddByPointer)
{
    CallbackQueue callbackQueue;
    MockClass mockClass;
    EXPECT_FALSE(mockClass.methodExecuted);
    callbackQueue.add<MockClass, &MockClass::method>(&mockClass);
    callbackQueue.process();
    EXPECT_TRUE(mockClass.methodExecuted);
    EXPECT_FALSE(callbackQueue.empty());
}