Injecting your test classes

Instead of manually creating your own mocks & fakes, it can be useful to inject them in your test classes, especially if you have multiple tests using them.

class MyTests {
    @Mock lateinit var db: Database
    @Mock lateinit var api: API

    @Fake lateinit var user: User

    lateinit var controller: Controller

    val mocker = Mocker()

    @BeforeTest fun setUp() {
        mocker.reset() (1)
        mocker.injectMocks(this) (2)
        controller = ControllerImpl(db, api) (3)
    }

    @Test fun controllerTest() {
        mocker.every { view.render(isAny()) } returns true
        controller.start()
        mocker.verify { view.render(model) }
    }
}

1	Resets the mocker before any test (which removes all mocked behaviour & logged calls), so that each test gets a "clean" mocker.
2	Injects mocks and fakes.
3	Create classes to be tested with injected mocks & fakes.

As soon as a class T contains a @Mock or @Fake annotated property, a Mocker.injectMocks(receiver: T) function will be created by the processor.

Don’t forget to reset the Mocker in a @BeforeTest method!

You can inject other classes than test classes:

class MyMocks {
    @Mock lateinit var db: Database
    @Mock lateinit var api: API
}

…will generate the Mocker.injectMocks(receiver: MyMocks) function.