package org.apidesign.singletons.usage;

import org.apidesign.singletons.api.DialogDisplayer;

import org.junit.BeforeClass;

import org.junit.Test;

import org.netbeans.junit.MockServices;

import static org.junit.Assert.*;

public class MainTest {

    public MainTest() {

    }

    @BeforeClass

    public static void setUpClass() throws Exception {

        MockServices.setServices(MockDialogDisplayer.class);

    }

    @Test

    public void testMainAsksAQuestion() {

        assertNull("No question asked yet", MockDialogDisplayer.askedQuery);

        Main.main(new String[0]);

        assertNotNull("main code asked our Mock displayer", MockDialogDisplayer.askedQuery);

    }

    public static final class MockDialogDisplayer extends DialogDisplayer {

        static String askedQuery;

        @Override

        public boolean yesOrNo(String query) {

            askedQuery = query;

            return false;

        }

    }

}