/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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 org.apache.commons.configuration2.io;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.mockito.Mockito.mock;
  
  import java.io.File;
  import java.net.URL;
  
  import org.apache.commons.configuration2.ConfigurationAssert;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  /**
   * Test class for {@code BasePathLocationStrategy}.
   */
  public class TestBasePathLocationStrategy {
      /** Constant for the name of the test file. */
      private static final String TEST_FILE = "test.xml";
  
      /**
       * Checks whether the passed in URL points to the expected test file.
       *
       * @param url the URL to be checked
       */
      private static void checkURL(final URL url) {
          assertEquals(FileLocatorUtils.fileFromURL(url).getAbsoluteFile(), ConfigurationAssert.getTestFile(TEST_FILE).getAbsoluteFile());
      }
  
      /** A mock for the file system. */
      private FileSystem fileSystem;
  
      /** The strategy to be tested. */
      private BasePathLocationStrategy strategy;
  
      @BeforeEach
      public void setUp() throws Exception {
          fileSystem = mock(FileSystem.class);
          strategy = new BasePathLocationStrategy();
      }
  
      /**
       * Tests a successful locate() operation with a valid base path and file name.
       */
      @Test
      public void testLocateSuccess() {
          final File path = ConfigurationAssert.TEST_DIR;
          final FileLocator locator = FileLocatorUtils.fileLocator().basePath(path.getAbsolutePath()).fileName(TEST_FILE).create();
          checkURL(strategy.locate(fileSystem, locator));
      }
  
      /**
       * Tests whether a prefix for relative file names is handled correctly.
       */
      @Test
      public void testLocateSuccessRelativePrefix() {
          final File path = ConfigurationAssert.TEST_DIR;
          final FileLocator locator = FileLocatorUtils.fileLocator().basePath(path.getAbsolutePath()).fileName("." + File.separator + TEST_FILE).create();
          checkURL(strategy.locate(fileSystem, locator));
      }
  
      /**
       * Tests whether a null base path is handled correctly.
       */
      @Test
      public void testNullBasePath() {
          final FileLocator locator = FileLocatorUtils.fileLocator().fileName(TEST_FILE).create();
          assertNull(strategy.locate(fileSystem, locator));
      }
  
      /**
       * Tests a locate() operation if no file name is provided.
       */
      @Test
      public void testNullFileName() {
          final FileLocator locator = FileLocatorUtils.fileLocator().basePath(ConfigurationAssert.getTestFile(TEST_FILE).getAbsolutePath()).create();
          assertNull(strategy.locate(fileSystem, locator));
      }
  }