package org.apidesign.anagram.gui;

import org.apidesign.anagram.api.Scrambler;

import org.apidesign.anagram.api.WordLibrary;

import org.junit.Before;

import static org.junit.Assert.*;

import org.junit.Test;

import org.netbeans.junit.MockServices;

public abstract class AnagramsTestBase {

    protected abstract Anagrams create();

    @Before

    public void cleanUpServices() {

        MockServices.setServices();

    }

    @Test public void testInjectionOfServices() throws Exception {

        Anagrams ui = create();

        assertNull("No scrambler injected yet", ui.getScrambler());

        assertNull("No scrambler injected yet", ui.getWordLibrary());

        MockServices.setServices(

            ReversingMockScrambler.class, SingleMockLibrary.class

        );

        Scrambler s = ui.getScrambler();

        assertNotNull("Now we have scrambler", s);

        assertEquals(

            "It is the mock one", ReversingMockScrambler.class, s.getClass()

        );

        WordLibrary l = ui.getWordLibrary();

        assertNotNull("Now we have library", l);

        assertEquals(

            "It is the mock one", SingleMockLibrary.class, l.getClass()

        );

        ui.display();

        assertEquals(

            "The word from SingleMockLibrary is taken",

            "Hello World!", ui.getOriginalWord()

        );

        assertEquals(

            "The word is rotated using ReversingMockScrambler",

            "!dlroW olleH", ui.getScrambledWord()

        );

    }

    public static final class ReversingMockScrambler implements Scrambler {

        public String scramble(String word) {

            return new StringBuilder(word).reverse().toString();

        }

    }

    public static final class SingleMockLibrary implements WordLibrary {

        public String[] getWords() {

            return new String[] { "Hello World!" };

        }

    }

}