/*
    * 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.io.IOException;
  import java.net.URL;
  import java.util.ArrayList;
  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.PropertiesFilesLoader;
  import de.smartics.testdoc.annotations.Uut;
  import de.smartics.testdoc.categories.Technical;
  import de.smartics.testdoc.categories.type.Coverage;
  
  /**
   * Tests {@link PropertiesFilesLoader}.
   */
  public class PropertiesFilesLoaderTest
  {
    // ********************************* Fields *********************************
  
    // --- constants ------------------------------------------------------------
  
    // --- members --------------------------------------------------------------
  
    @Uut
    private PropertiesFilesLoader uut;
  
    // ****************************** Inner Classes *****************************
  
    // ********************************* Methods ********************************
  
    // --- prepare --------------------------------------------------------------
  
    @Before
    public void setUp()
    {
      uut = new PropertiesFilesLoader();
    }
  
    // --- helper ---------------------------------------------------------------
  
    // --- tests ----------------------------------------------------------------
  
    @Test
    @Category(Technical.class)
    public void allowsNullAsCollectionOfClassPathRoots()
    {
      final Set<String> propertiesFiles = uut.getPropertiesFiles(null);
      assertThat(propertiesFiles.isEmpty(), is(true));
    }
  
    @Test
    @Category(Technical.class)
    public void allowsAnEmptyCollectionOfClassPathRoots()
    {
      final Set<String> propertiesFiles =
          uut.getPropertiesFiles(new HashSet<URL>());
      assertThat(propertiesFiles.isEmpty(), is(true));
    }
  
    @Test
    @Category(Technical.class)
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public void returnsOnlyPropertiesFiles() throws IOException
    {
      final String propertiesFileInClassPath =
          "example/de/smartics/properties/simple/configuration.properties";
  
      final ClassLoader loader = SimpleProperties.class.getClassLoader(); // NOPMD
      final URL url = loader.getResource("");
      final Set<String> propertiesFiles =
          uut.getPropertiesFiles(Arrays.asList(url));
     assertThat(propertiesFiles.isEmpty(), is(false));
     assertThat(propertiesFiles, (Matcher) hasItems(propertiesFileInClassPath));
   }
 
   @Test
   @Category(Technical.class)
   @SuppressWarnings({ "unchecked", "rawtypes" })
   public void returnsBootPropertiesFile() throws IOException
   {
     final String bootPropertiesInClassPath =
         "META-INF/smartics-properties/boot.properties";
 
     final ClassLoader loader = SimpleProperties.class.getClassLoader(); // NOPMD
     final URL url = loader.getResource("example/de/smartics/properties/boot");
     final Set<String> propertiesFiles =
         uut.getBootPropertiesFiles(Arrays.asList(url));
     assertThat(propertiesFiles.isEmpty(), is(false));
     assertThat(propertiesFiles, (Matcher) hasItems(bootPropertiesInClassPath));
   }
 
   @Test
   @Category(Technical.class)
   public void returnsNoBootPropertiesFileIfNoneIsProvided() throws IOException
   {
     final ClassLoader loader = SimpleProperties.class.getClassLoader(); // NOPMD
     final URL url = loader.getResource("example/de/smartics/properties/simple");
     final Set<String> propertiesFiles =
         uut.getBootPropertiesFiles(Arrays.asList(url));
     assertThat(propertiesFiles.isEmpty(), is(true));
   }
 
   @Test
   @Category(Coverage.class)
   public void fetchingBootPropertiesAllowsUrlsToBeNull() throws IOException
   {
     final Set<String> propertiesFiles = uut.getBootPropertiesFiles(null);
     assertThat(propertiesFiles.isEmpty(), is(true));
   }
 
   @Test
   @Category(Coverage.class)
   public void fetchingBootPropertiesAllowsUrlsToBeEmpty() throws IOException
   {
     final Set<String> propertiesFiles =
         uut.getBootPropertiesFiles(new ArrayList<URL>(0));
     assertThat(propertiesFiles.isEmpty(), is(true));
   }
 }