import org.junit.jupiter.api.Test;


import static org.mockito.Mockito.*;
class ExecutorTest {

    @Test
    void printHelloWoldOnStdOut() {
        HelloWorldWriter outMock = mock(OutWriter.class);
        HelloWorldWriter errMock = mock(ErrorWriter.class);

        Executor.printHelloWorld(outMock, errMock, false);

        verify(outMock, times(1)).writeHelloWorld();
        verify(errMock, times(0)).writeHelloWorld();

    }

    @Test
    void printHelloWoldOnStdErr() {
        HelloWorldWriter outMock = mock(OutWriter.class);
        HelloWorldWriter errMock = mock(ErrorWriter.class);

        Executor.printHelloWorld(outMock, errMock, true);

        verify(outMock, times(0)).writeHelloWorld();
        verify(errMock, times(1)).writeHelloWorld();

    }

}