/*
    * Copyright 2012-2013 smartics, Kronseder & Reiner GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package de.smartics.properties.spi.core.context;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.allOf;
  import static org.hamcrest.Matchers.hasItem;
  
  import java.net.URL;
  import java.net.URLClassLoader;
  import java.util.List;
  import java.util.Locale;
  
  import org.junit.Before;
  import org.junit.Test;
  
  import de.smartics.properties.api.core.domain.ConfigException;
  import de.smartics.testdoc.annotations.Uut;
  import de.smartics.util.lang.classpath.ClassPathContext;
  
  /**
   * Tests {@link LocaleFinder}.
   */
  public class LocaleFinderTest
  {
    // ********************************* Fields *********************************
  
    // --- constants ------------------------------------------------------------
  
    private static final Locale DEFAULT_LOCALE = new Locale("");
  
    private static final Locale VARIANT_LOCALE = new Locale("de", "DE", "test");
  
    private static final String TEST_ID = "test";
  
    // --- members --------------------------------------------------------------
  
    @Uut
    private LocaleFinder uut;
  
    // ****************************** Inner Classes *****************************
  
    // ********************************* Methods ********************************
  
    // --- prepare --------------------------------------------------------------
  
    @Before
    public void setUp()
    {
      this.uut = new LocaleFinder();
    }
  
    // --- helper ---------------------------------------------------------------
  
    private static ClassLoader createClassLoader(final String jar)
    {
      final URL jarUrl = LocaleFinderTest.class.getResource(jar + ".jar");
      final ClassLoader loader = new URLClassLoader(new URL[] { jarUrl });
      return loader;
    }
  
    private List<Locale> runTest(final String jar) throws ConfigException
    {
      final ClassLoader loader = createClassLoader(jar);
      final ClassPathContext context = new ClassPathContext(loader, null);
      final List<Locale> locales = uut.find(TEST_ID, context);
      return locales;
    }
  
    // --- tests ----------------------------------------------------------------
  
    @Test
    public void returnsTheDefaultLocaleIfNoPropertySetIsFound()
    {
      final List<Locale> locales = runTest("no-property-set");
      assertThat(locales, hasItem(DEFAULT_LOCALE));
    }
  
    @Test
    public void returnsTheDefaultLocaleIfOnlyPropertySetsAreFoundWithoutSuffix()
    {
      final List<Locale> locales = runTest("no-locale");
      assertThat(locales, hasItem(DEFAULT_LOCALE));
    }
  
    @Test
   public void returnsAllLocalesOfAPropertySet()
   {
     final List<Locale> locales = runTest("two-property-sets-full-locale");
     assertThat(
         locales,
         allOf(hasItem(DEFAULT_LOCALE), hasItem(Locale.ENGLISH),
             hasItem(Locale.GERMAN), hasItem(Locale.GERMANY),
             hasItem(VARIANT_LOCALE)));
   }
 
   @Test
   public void returnsAllLocalesOfDifferentPropertySetsEvenIfNotEveryLocaleIsSupportedByEveryPropertySet()
   {
     final List<Locale> locales = runTest("two-property-sets-missing-locales");
     assertThat(
         locales,
         allOf(hasItem(DEFAULT_LOCALE), hasItem(Locale.ENGLISH),
             hasItem(Locale.GERMAN), hasItem(Locale.GERMANY),
             hasItem(VARIANT_LOCALE)));
   }
 }