package candiedOrange.plugin.adapters;

import candiedOrange.plugin.usecases.ButtonUseCaseInputPort;

public class ButtonControler {
    ButtonUseCaseInputPort button;

    public ButtonControler(ButtonUseCaseInputPort button) {
        this.button = button;
    }

    public void push() {
        button.push();
    }
}

package candiedOrange.plugin.usecases;

public interface ButtonUseCaseInputPort {
    void push();
}

package candiedOrange.plugin.usecases;

public class ButtonPushUseCaseInteractor implements ButtonUseCaseInputPort {
    ButtonUseCaseOutputPort outputPort;

    public ButtonPushUseCaseInteractor(ButtonUseCaseOutputPort outputPort){
        this.outputPort = outputPort;
    }

    @Override
    public void push() {
        outputPort.push();
    }
}

package candiedOrange.plugin.usecases;

public interface ButtonUseCaseOutputPort {
    void push();
}

package candiedOrange.plugin.adapters;

import candiedOrange.plugin.usecases.ButtonUseCaseOutputPort;

public class ButtonPresenter implements ButtonUseCaseOutputPort{

    @Override
    public void push() {
        System.out.print("push");
    }
}

package candiedOrange.plugin;

import candiedOrange.plugin.usecases.ButtonPushUseCaseInteractor;
import candiedOrange.plugin.usecases.ButtonUseCaseInputPort;
import candiedOrange.plugin.usecases.ButtonUseCaseOutputPort;
import org.junit.Test;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

public class TestUseCases {

    public static class PushMock implements ButtonUseCaseInputPort, ButtonUseCaseOutputPort {
        boolean pushed;
        public boolean isPushed() { return pushed; }
        public void push() { this.pushed = true; }
    }

    @Test
    public void testInteractor() {
        PushMock presentorMock = new PushMock();
        assertFalse(presentorMock.isPushed());
        new ButtonPushUseCaseInteractor(presentorMock).push();
        assertTrue(presentorMock.isPushed());
    }
}

package candiedOrange.plugin;

    import candiedOrange.plugin.adapters.ButtonControler;
    import candiedOrange.plugin.adapters.ButtonPresenter;
    import candiedOrange.plugin.usecases.ButtonPushUseCaseInteractor;
    import candiedOrange.plugin.usecases.ButtonUseCaseInputPort;
    import candiedOrange.plugin.usecases.ButtonUseCaseOutputPort;
    import org.junit.After;
    import org.junit.Before;
    import org.junit.Test;

    import java.io.ByteArrayOutputStream;
    import java.io.PrintStream;

    import static org.junit.Assert.assertEquals;
    import static org.junit.Assert.assertFalse;
    import static org.junit.Assert.assertTrue;

    public class TestAdapters {

        private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();

        private PrintStream oldStdOut;

        @Before
        public void setUpStreams() {
            oldStdOut = System.out;
            System.setOut(new PrintStream(outContent));
        }

        @After
        public void cleanUpStreams() {
            System.setOut(oldStdOut);
        }

        @Test
        public void testOut() {
            System.out.print("hello");
            assertEquals("hello", outContent.toString());
        }

        @Test
        public void testPresenter() {
            outContent.reset();
            new ButtonPresenter().push();
            assertEquals("push", outContent.toString());
        }

        @Test
        public void testControler() {
            TestUseCases.PushMock interactorMock = new TestUseCases.PushMock();
            assertFalse(interactorMock.isPushed());
            new ButtonControler(interactorMock).push();
            assertTrue(interactorMock.isPushed());
        }

        @Test
        public void testEndToEnd() {
            outContent.reset();
            new ButtonControler(new ButtonPushUseCaseInteractor(new ButtonPresenter())).push();
            assertEquals("push", outContent.toString());
        }
    }