Expecting googlemock calls from another thread

Question

What will be the best way to write (google) test cases using a google mock object and expect the EXPECT_CALL() definitions being called from another thread controlled by the

Answer 1

Fraser's answer inspired me also. I used his suggestion, and it worked, but then I found another way to accomplish the same without the condition variable. You'll need to add a method to check some condition, and you'll need an infinite loop. This is also assuming that you have a separate thread that will update the condition.

TEST_F(BarTest, DoSomethingWhenFunc2Gt0)
{
    EXPECT_CALL(fooInterfaceMock,func1()).Times(1);
    EXPECT_CALL(fooInterfaceMock,func2()).Times(1).WillOnce(Return(1));

    bar.start();
    bar.triggerDoSomething();

    // How long of a wait is too long?
    auto now = chrono::system_clock::now();
    auto tooLong = now + std::chrono::milliseconds(50); 

    /* Expect your thread to update this condition, so execution will continue
     * as soon as the condition is updated and you won't have to sleep
     * for the remainder of the time
     */
    while (!bar.condition() && (now = chrono::system_clock::now()) < tooLong) 
    {
        /* Not necessary in all cases, but some compilers may optimize out
         * the while loop if there's no loop body.
         */
        this_thread::sleep_for(chrono::milliseconds(1));
    }

    // If the assertion fails, then time ran out.  
    ASSERT_LT(now, tooLong);

    bar.stop();
}