/*
    * Copyright (C) 2009, Google Inc. and others
    *
    * This program and the accompanying materials are made available under the
    * terms of the Eclipse Distribution License v. 1.0 which is available at
    * https://www.eclipse.org/org/documents/edl-v10.php.
    *
    * SPDX-License-Identifier: BSD-3-Clause
    */
  
  package org.eclipse.jgit.internal.storage.file;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.fail;
  
  import org.eclipse.jgit.junit.RepositoryTestCase;
  import org.eclipse.jgit.storage.file.WindowCacheConfig;
  import org.junit.Test;
  
  public class WindowCacheReconfigureTest extends RepositoryTestCase {
  	@Test
  	public void testConfigureCache_PackedGitLimit_0() {
  		try {
  			final WindowCacheConfig cfg = new WindowCacheConfig();
  			cfg.setPackedGitLimit(0);
  			cfg.install();
  			fail("incorrectly permitted PackedGitLimit = 0");
  		} catch (IllegalArgumentException e) {
  			//
  		}
  	}
  
  	@Test
  	public void testConfigureCache_PackedGitWindowSize_0() {
  		try {
  			final WindowCacheConfig cfg = new WindowCacheConfig();
  			cfg.setPackedGitWindowSize(0);
  			cfg.install();
  			fail("incorrectly permitted PackedGitWindowSize = 0");
  		} catch (IllegalArgumentException e) {
  			assertEquals("Invalid window size", e.getMessage());
  		}
  	}
  
  	@Test
  	public void testConfigureCache_PackedGitWindowSize_512() {
  		try {
  			final WindowCacheConfig cfg = new WindowCacheConfig();
  			cfg.setPackedGitWindowSize(512);
  			cfg.install();
  			fail("incorrectly permitted PackedGitWindowSize = 512");
  		} catch (IllegalArgumentException e) {
  			assertEquals("Invalid window size", e.getMessage());
  		}
  	}
  
  	@Test
  	public void testConfigureCache_PackedGitWindowSize_4097() {
  		try {
  			final WindowCacheConfig cfg = new WindowCacheConfig();
  			cfg.setPackedGitWindowSize(4097);
  			cfg.install();
  			fail("incorrectly permitted PackedGitWindowSize = 4097");
  		} catch (IllegalArgumentException e) {
  			assertEquals("Window size must be power of 2", e.getMessage());
  		}
  	}
  
  	@Test
  	public void testConfigureCache_PackedGitOpenFiles_0() {
  		try {
  			final WindowCacheConfig cfg = new WindowCacheConfig();
  			cfg.setPackedGitOpenFiles(0);
  			cfg.install();
  			fail("incorrectly permitted PackedGitOpenFiles = 0");
  		} catch (IllegalArgumentException e) {
  			assertEquals("Open files must be >= 1", e.getMessage());
  		}
  	}
  
  	@Test
  	public void testConfigureCache_PackedGitWindowSizeAbovePackedGitLimit() {
  		try {
  			final WindowCacheConfig cfg = new WindowCacheConfig();
  			cfg.setPackedGitLimit(1024);
  			cfg.setPackedGitWindowSize(8192);
  			cfg.install();
  			fail("incorrectly permitted PackedGitWindowSize > PackedGitLimit");
  		} catch (IllegalArgumentException e) {
  			assertEquals("Window size must be < limit", e.getMessage());
  		}
  	}
  
  	@Test
  	public void testConfigureCache_Limits1() {
  		// This test is just to force coverage over some lower bounds for
  		// the table. We don't want the table to wind up with too small
  		// of a size. This is highly dependent upon the table allocation
  		// algorithm actually implemented in WindowCache.
 		//
 		final WindowCacheConfig cfg = new WindowCacheConfig();
 		cfg.setPackedGitLimit(6 * 4096 / 5);
 		cfg.setPackedGitWindowSize(4096);
 		cfg.install();
 	}
 }