Kotlin Standard Library Cookbook

How to do it...

1. Create a new test class:

class MyTest {}

2. Add a mocked Api type test-class property:

class MyTest {    val api: Api = mock()}

3. Instantiate the Authenticator class as the class property:

class MyTest {    val api: Api = mock()    val authenticator = Authenticator(api)}

4. Implement the test to verify whether the Api.authorise() function is called at least 10 times in case of consecutive failed authorization attempts:

class MyTest {    val api: Api = mock()    val authenticator = Authenticator(api)    @Test    fun `should retry auth at least 10 times when Api returns empty    token`() {        whenever(api.authorise(any())) doReturn ""        val context = TestCoroutineContext()        runBlocking(context) {          authenticator.tryToAuthorise("admin:1234".toByteArray ...