Mockk unit fun example

AuthorizationProvider.kt

interface AuthorizationProvider {
  fun getAuthorizationToken(): String?
  fun storeAuthorizationToken(token: String)
}

LoginViewModel.kt

class LoginViewModel(
  private val authProvider: AuthorizationProvider
): ViewModel() {
  fun handleSuccessfulLogin(authToken: String) {
    authProvider.storeAuthorizationToken(authToken)
  }
}

LoginViewModelTest.kt

class LoginViewModelTest {
  private val mockAuthProvider: AuthorizationProvider = mockk()
  
  @Test
  fun testValidLogin() {
    val viewModel = LoginViewModel(mockAuthProvider)
    viewModel.handleSuccessfulLogin("Test Token")
    verify(exactly = 1) {
      mockAuthProvider.storeAuthorizationToken("Test Token")
    }
  }
}

// Using the above code, this fails because storeAuthorizationToken is not mocked
// I can resolve using `mockk(relaxUnitFun = true)`.