/*
    * Copyright (C) 2013, Robin Stocker <robin@nibor.org>
    * and other copyright owners as documented in the project's IP log.
    *
    * This program and the accompanying materials are made available
    * under the terms of the Eclipse Distribution License v1.0 which
    * accompanies this distribution, is reproduced below, and is
    * available at http://www.eclipse.org/org/documents/edl-v10.php
    *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or
   * without modification, are permitted provided that the following
   * conditions are met:
   *
   * - Redistributions of source code must retain the above copyright
   *   notice, this list of conditions and the following disclaimer.
   *
   * - Redistributions in binary form must reproduce the above
   *   copyright notice, this list of conditions and the following
   *   disclaimer in the documentation and/or other materials provided
   *   with the distribution.
   *
   * - Neither the name of the Eclipse Foundation, Inc. nor the
   *   names of its contributors may be used to endorse or promote
   *   products derived from this software without specific prior
   *   written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
   * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package org.eclipse.jgit.lib;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import java.io.IOException;
  import java.util.Arrays;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import org.junit.Test;
  
  public class RefDatabaseConflictingNamesTest {
  
  	private RefDatabase refDatabase = new RefDatabase() {
  		@Override
  		public Map<String, Ref> getRefs(String prefix) throws IOException {
  			if (ALL.equals(prefix)) {
  				Map<String, Ref> existing = new HashMap<>();
  				existing.put("refs/heads/a/b", null /* not used */);
  				existing.put("refs/heads/q", null /* not used */);
  				return existing;
  			} else {
  				return Collections.emptyMap();
  			}
  		}
  
  		@Override
  		public Ref peel(Ref ref) throws IOException {
  			return null;
  		}
  
  		@Override
  		public RefUpdate newUpdate(String name, boolean detach)
  				throws IOException {
  			return null;
  		}
  
  		@Override
  		public RefRename newRename(String fromName, String toName)
  				throws IOException {
  			return null;
  		}
  
  		@Override
  		public boolean isNameConflicting(String name) throws IOException {
  			return false;
  		}
  
  		@Override
  		public Ref getRef(String name) throws IOException {
  			return null;
 		}
 
 		@Override
 		public List<Ref> getAdditionalRefs() throws IOException {
 			return null;
 		}
 
 		@Override
 		public void create() throws IOException {
 			// Not needed
 		}
 
 		@Override
 		public void close() {
 			// Not needed
 		}
 	};
 
 	@Test
 	public void testGetConflictingNames() throws IOException {
 		// new references cannot replace an existing container
 		assertConflictingNames("refs", "refs/heads/a/b", "refs/heads/q");
 		assertConflictingNames("refs/heads", "refs/heads/a/b", "refs/heads/q");
 		assertConflictingNames("refs/heads/a", "refs/heads/a/b");
 
 		// existing reference is not conflicting
 		assertNoConflictingNames("refs/heads/a/b");
 
 		// new references are not conflicting
 		assertNoConflictingNames("refs/heads/a/d");
 		assertNoConflictingNames("refs/heads/master");
 
 		// existing reference must not be used as a container
 		assertConflictingNames("refs/heads/a/b/c", "refs/heads/a/b");
 		assertConflictingNames("refs/heads/q/master", "refs/heads/q");
 	}
 
 	private void assertNoConflictingNames(String proposed) throws IOException {
 		assertTrue("expected conflicting names to be empty", refDatabase
 				.getConflictingNames(proposed).isEmpty());
 	}
 
 	private void assertConflictingNames(String proposed, String... conflicts)
 			throws IOException {
 		Set<String> expected = new HashSet<>(Arrays.asList(conflicts));
 		assertEquals(expected,
 				new HashSet<>(refDatabase.getConflictingNames(proposed)));
 	}
 }