kotlin_testing_pt2_example_2_test.kt

package testing.fabiocarballo.com.myapplication

import com.nhaarman.mockito_kotlin.mock
import com.nhaarman.mockito_kotlin.verify
import com.nhaarman.mockito_kotlin.whenever
import org.junit.Test

class TemperaturePresenterTest {

    val locationProvider: LocationProvider = mock()
    val temperatureProvider: TemperatureProvider = mock()
    val view: View = mock()

    val tested = TemperaturePresenter(locationProvider, temperatureProvider, view)

    @Test
    fun `correct temperature is displayed in view`() {
        whenever(locationProvider.getLocationISOCode()).then { "PT" }
        whenever(temperatureProvider.getCelsiusTemperatureAt("PT")).thenReturn(21.0f)

        tested.start()

        verify(view).displayTemperature(21.0f, "PT")
    }
}