Mocking Examples

mocking.cs

[Fact]
public void send_custom_greeting_by_email()
{
    var sut = new GreetingService();
    var emailGateway = new Mock<IEmailGateway>();

    sut.SendMail(emailGateway.Object, "Joe", "[email protected]");

    emailGateway.Verify(es =>
        es.Send("[email protected]", "Hello, Joe!"));
}

mocking.java

@Test
public void send_custom_greeting_by_email() {
    GreetingService sut = new GreetingService();
    EmailGateway emailGateway = mock(EmailGateway.class);

    sut.sendMail(emailGateway, "Joe", "[email protected]");

    verify(emailGateway).send("[email protected]", "Hello, Joe!");
}

mocking.js

test( "send_custom_greeting_by_email", function () {
    const sut = new GreetingService()
    const emailGateway = new EmailGateway()

    const expectation = mock( emailGateway )
        .expects( "send" )
        .withArgs( "[email protected]", "Hello, Joe!" )

    sut.sendMail( emailGateway, "Joe", "[email protected]" )

    expectation.verify()
} )