/*
    * 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 test.de.smartics.properties.spi.core.classpath;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.hasItems;
  import static org.hamcrest.Matchers.is;
  
  import help.de.smartics.properties.core.SimpleProperties;
  
  import java.net.URL;
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.hamcrest.Matcher;
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  import de.smartics.properties.spi.core.classpath.PropertySetClassesLoader;
  import de.smartics.testdoc.annotations.Uut;
  import de.smartics.testdoc.categories.Technical;
  
  /**
   * Tests {@link PropertySetClassesLoader}.
   */
  public class PropertySetClassesLoaderTest
  {
    // ********************************* Fields *********************************
  
    // --- constants ------------------------------------------------------------
  
    // --- members --------------------------------------------------------------
  
    @Uut
    private PropertySetClassesLoader uut;
  
    // ****************************** Inner Classes *****************************
  
    // ********************************* Methods ********************************
  
    // --- prepare --------------------------------------------------------------
  
    @Before
    public void setUp()
    {
      uut = new PropertySetClassesLoader();
    }
  
    // --- helper ---------------------------------------------------------------
  
    // --- tests ----------------------------------------------------------------
  
    @Test
    @Category(Technical.class)
    public void allowsNullAsCollectionOfClassPathRoots()
    {
      final Set<Class<?>> types = uut.getPropertySetTypes(null);
      assertThat(types.isEmpty(), is(true));
    }
  
    @Test
    @Category(Technical.class)
    public void allowsAnEmptyCollectionOfClassPathRoots()
    {
      final Set<Class<?>> types = uut.getPropertySetTypes(new HashSet<URL>());
      assertThat(types.isEmpty(), is(true));
    }
  
    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Test
    @Category(Technical.class)
    public void returnsOnlyTypesAnnotatedAsPropertySet()
    {
      final URL url = SimpleProperties.class.getClassLoader().getResource(""); // NOPMD
      final Set<Class<?>> types = uut.getPropertySetTypes(Arrays.asList(url));
      assertThat(types.isEmpty(), is(false));
      assertThat(types, (Matcher) hasItems(SimpleProperties.class));
    }
  
  }