/*
    * Copyright (C) 2019, Matthias Sohn <matthias.sohn@sap.com>
    * 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,
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   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package org.eclipse.jgit.util;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  import static org.junit.Assert.assertNull;
  
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Path;
  
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  
  public class SimpleLruCacheTest {
  
  	private Path trash;
  
  	private SimpleLruCache<String, String> cache;
  
  
  	@Before
  	public void setup() throws IOException {
  		trash = Files.createTempDirectory("tmp_");
  		cache = new SimpleLruCache<>(100, 0.2f);
  	}
  
  	@Before
  	@After
  	public void tearDown() throws Exception {
  		FileUtils.delete(trash.toFile(),
  				FileUtils.RECURSIVE | FileUtils.SKIP_MISSING);
  	}
  
  	@Test
  	public void testPutGet() {
  		cache.put("a", "A");
  		cache.put("z", "Z");
  		assertEquals("A", cache.get("a"));
  		assertEquals("Z", cache.get("z"));
  	}
  
  	@Test(expected = IllegalArgumentException.class)
  	public void testPurgeFactorTooLarge() {
  		cache.configure(5, 1.01f);
  	}
  
  	@Test(expected = IllegalArgumentException.class)
  	public void testPurgeFactorTooLarge2() {
  		cache.configure(5, 100);
  	}
  
  	@Test(expected = IllegalArgumentException.class)
  	public void testPurgeFactorTooSmall() {
  		cache.configure(5, 0);
  	}
  
 	@Test(expected = IllegalArgumentException.class)
 	public void testPurgeFactorTooSmall2() {
 		cache.configure(5, -100);
 	}
 
 	@Test
 	public void testGetMissing() {
 		assertEquals(null, cache.get("a"));
 	}
 
 	@Test
 	public void testPurge() {
 		for (int i = 0; i < 101; i++) {
 			cache.put("a" + i, "a" + i);
 		}
 		assertEquals(80, cache.size());
 		assertNull(cache.get("a0"));
 		assertNull(cache.get("a20"));
 		assertNotNull(cache.get("a21"));
 		assertNotNull(cache.get("a99"));
 	}
 
 	@Test
 	public void testConfigure() {
 		for (int i = 0; i < 100; i++) {
 			cache.put("a" + i, "a" + i);
 		}
 		assertEquals(100, cache.size());
 		cache.configure(10, 0.3f);
 		assertEquals(7, cache.size());
 		assertNull(cache.get("a0"));
 		assertNull(cache.get("a92"));
 		assertNotNull(cache.get("a93"));
 		assertNotNull(cache.get("a99"));
 	}
 }