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44 package org.eclipse.jgit.internal.storage.file;
45
46 import static org.junit.Assert.assertEquals;
47 import static org.junit.Assert.assertNotNull;
48 import static org.junit.Assert.assertTrue;
49
50 import java.io.BufferedReader;
51 import java.io.FileInputStream;
52 import java.io.IOException;
53 import java.io.InputStreamReader;
54 import java.util.ArrayList;
55 import java.util.List;
56
57 import org.eclipse.jgit.errors.CorruptObjectException;
58 import org.eclipse.jgit.junit.JGitTestUtil;
59 import org.eclipse.jgit.lib.Constants;
60 import org.eclipse.jgit.lib.ObjectId;
61 import org.eclipse.jgit.lib.ObjectLoader;
62 import org.eclipse.jgit.storage.file.WindowCacheConfig;
63 import org.eclipse.jgit.test.resources.SampleDataRepositoryTestCase;
64 import org.eclipse.jgit.util.MutableInteger;
65 import org.junit.Before;
66 import org.junit.Test;
67
68 public class WindowCacheGetTest extends SampleDataRepositoryTestCase {
69 private List<TestObject> toLoad;
70
71 @Override
72 @Before
73 public void setUp() throws Exception {
74 super.setUp();
75
76 toLoad = new ArrayList<>();
77 final BufferedReader br = new BufferedReader(new InputStreamReader(
78 new FileInputStream(JGitTestUtil
79 .getTestResourceFile("all_packed_objects.txt")),
80 Constants.CHARSET));
81 try {
82 String line;
83 while ((line = br.readLine()) != null) {
84 final String[] parts = line.split(" {1,}");
85 final TestObject o = new TestObject();
86 o.id = ObjectId.fromString(parts[0]);
87 o.setType(parts[1]);
88
89
90
91 toLoad.add(o);
92 }
93 } finally {
94 br.close();
95 }
96 assertEquals(96, toLoad.size());
97 }
98
99 @Test
100 public void testCache_Defaults() throws IOException {
101 WindowCacheConfig cfg = new WindowCacheConfig();
102 cfg.install();
103 doCacheTests();
104 checkLimits(cfg);
105
106 final WindowCache cache = WindowCache.getInstance();
107 assertEquals(6, cache.getOpenFiles());
108 assertEquals(17346, cache.getOpenBytes());
109 }
110
111 @Test
112 public void testCache_TooFewFiles() throws IOException {
113 final WindowCacheConfig cfg = new WindowCacheConfig();
114 cfg.setPackedGitOpenFiles(2);
115 cfg.install();
116 doCacheTests();
117 checkLimits(cfg);
118 }
119
120 @Test
121 public void testCache_TooSmallLimit() throws IOException {
122 final WindowCacheConfig cfg = new WindowCacheConfig();
123 cfg.setPackedGitWindowSize(4096);
124 cfg.setPackedGitLimit(4096);
125 cfg.install();
126 doCacheTests();
127 checkLimits(cfg);
128 }
129
130 private static void checkLimits(final WindowCacheConfig cfg) {
131 final WindowCache cache = WindowCache.getInstance();
132 assertTrue(cache.getOpenFiles() <= cfg.getPackedGitOpenFiles());
133 assertTrue(cache.getOpenBytes() <= cfg.getPackedGitLimit());
134 assertTrue(0 < cache.getOpenFiles());
135 assertTrue(0 < cache.getOpenBytes());
136 }
137
138 private void doCacheTests() throws IOException {
139 for (final TestObject o : toLoad) {
140 final ObjectLoader or = db.open(o.id, o.type);
141 assertNotNull(or);
142 assertEquals(o.type, or.getType());
143 }
144 }
145
146 private class TestObject {
147 ObjectId id;
148
149 int type;
150
151 void setType(final String typeStr) throws CorruptObjectException {
152 final byte[] typeRaw = Constants.encode(typeStr + " ");
153 final MutableInteger ptr = new MutableInteger();
154 type = Constants.decodeTypeString(id, typeRaw, (byte) ' ', ptr);
155 }
156 }
157 }