16. InOrder

package lesson16;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InOrder;
import org.mockito.runners.MockitoJUnitRunner;
import java.util.List;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;

@RunWith(MockitoJUnitRunner.class)
public class InOrderTest {
    @Test
    public void testSingleMock() {
        // A. Single mock whose methods must be invoked in a particular order
        List singleMock = mock(List.class);

        //using a single mock
        singleMock.add("was added first");
        singleMock.add("was added second");

        //create an inOrder verifier for a single mock
        InOrder inOrder = inOrder(singleMock);

        //following will make sure that add is first called with "was added first", then with "was added second"
        inOrder.verify(singleMock).add("was added first");
        inOrder.verify(singleMock).add("was added second");


    }

    @Test
    public void testMultiMock() {
        // B. Multiple mocks that must be used in a particular order
        List firstMock = mock(List.class);
        List secondMock = mock(List.class);

        //using mocks
        firstMock.add("was called first");
        secondMock.add("was called second");

        //create inOrder object passing any mocks that need to be verified in order
        InOrder inOrder = inOrder(firstMock, secondMock);

        //following will make sure that firstMock was called before secondMock
        inOrder.verify(firstMock).add("was called first");
        inOrder.verify(secondMock).add("was called second");

    }
}