mcvTests.swift

func testGetUsersShouldReturnUsersCollection() {

    // Arrange.
    let fakeHttpRequest = FakeHTTPRequest()
    let fakeHttpResponse = FakeHTTPResponse()
    let fakeUsersRepository = FakeUsersRepository()

    fakeUsersRepository.getUsersMock.expect(any())
    fakeUsersRepository.getUsersStub.on(any(), return: [
            User(id: 1, name: "John Doe", email: "[email protected]", isLocked: false),
            User(id: 2, name: "Victor Doe", email: "[email protected]", isLocked: false)
    ])
    let usersController = UsersController(usersRepository: fakeUsersRepository)

    // Act.
    usersController.getUsers(request: fakeHttpRequest, response: fakeHttpResponse)

    // Assert.
    let users = try! fakeHttpResponse.getObjectFromResponseBody(Array<User>.self)
    fakeUsersRepository.getUsersMock.verify()
    XCTAssertEqual(HTTPResponseStatus.ok.code, fakeHttpResponse.status.code)
    XCTAssertEqual(2, users.count)
    XCTAssertEqual("[email protected]", users[0].email)
    XCTAssertEqual("[email protected]", users[1].email)
}

func testGetUserShouldReturnUserWhenWeProvideCorrectId() {

    // Arrange.
    let fakeHttpRequest = FakeHTTPRequest(urlVariables: ["id": "1"])
    let fakeHttpResponse = FakeHTTPResponse()
    let fakeUsersRepository = FakeUsersRepository()

    fakeUsersRepository.getUserMock.expect(any())
    fakeUsersRepository.getUserStub.on(equals(1), return:
        User(id: 1, name: "John Doe", email: "[email protected]", isLocked: false)
    )
    let usersController = UsersController(usersRepository: fakeUsersRepository)

    // Act.
    usersController.getUser(request: fakeHttpRequest, response: fakeHttpResponse)

    // Assert.
    let users = try! fakeHttpResponse.getObjectFromResponseBody(User.self)
    fakeUsersRepository.getUserMock.verify()
    XCTAssertEqual(HTTPResponseStatus.ok.code, fakeHttpResponse.status.code)
    XCTAssertEqual(1, users.id)
    XCTAssertEqual("[email protected]", users.email)
}

func testGetUserShouldReturnNotFoundStatusCodeWhenWeProvideIncorrectId() {

    // Arrange.
    let fakeHttpRequest = FakeHTTPRequest(urlVariables: ["id": "2"])
    let fakeHttpResponse = FakeHTTPResponse()
    let fakeUsersRepository = FakeUsersRepository()

    fakeUsersRepository.getUserMock.expect(any())
    fakeUsersRepository.getUserStub.on(equals(2), return: nil)
    let usersController = UsersController(usersRepository: fakeUsersRepository)

    // Act.
    usersController.getUser(request: fakeHttpRequest, response: fakeHttpResponse)

    // Assert.
    XCTAssertEqual(HTTPResponseStatus.notFound.code, fakeHttpResponse.status.code)
}