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.*;

// BEGIN: singletons.injectable.test

public class 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;

        }

    }

}

// END: singletons.injectable.test