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44 package org.eclipse.jgit.internal.storage.file;
45
46 import static java.nio.charset.StandardCharsets.UTF_8;
47 import static org.junit.Assert.assertEquals;
48 import static org.junit.Assert.assertNotNull;
49 import static org.junit.Assert.assertTrue;
50
51 import java.io.BufferedReader;
52 import java.io.FileInputStream;
53 import java.io.IOException;
54 import java.io.InputStreamReader;
55 import java.util.ArrayList;
56 import java.util.List;
57
58 import org.eclipse.jgit.errors.CorruptObjectException;
59 import org.eclipse.jgit.junit.JGitTestUtil;
60 import org.eclipse.jgit.lib.Constants;
61 import org.eclipse.jgit.lib.ObjectId;
62 import org.eclipse.jgit.lib.ObjectLoader;
63 import org.eclipse.jgit.storage.file.WindowCacheConfig;
64 import org.eclipse.jgit.test.resources.SampleDataRepositoryTestCase;
65 import org.eclipse.jgit.util.MutableInteger;
66 import org.junit.Before;
67 import org.junit.Test;
68
69 public class WindowCacheGetTest extends SampleDataRepositoryTestCase {
70 private List<TestObject> toLoad;
71
72 @Override
73 @Before
74 public void setUp() throws Exception {
75 super.setUp();
76
77 toLoad = new ArrayList<>();
78 try (BufferedReader br = new BufferedReader(new InputStreamReader(
79 new FileInputStream(JGitTestUtil
80 .getTestResourceFile("all_packed_objects.txt")),
81 UTF_8))) {
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 }
94 assertEquals(96, toLoad.size());
95 }
96
97 @Test
98 public void testCache_Defaults() throws IOException {
99 WindowCacheConfig cfg = new WindowCacheConfig();
100 cfg.install();
101 doCacheTests();
102 checkLimits(cfg);
103
104 final WindowCache cache = WindowCache.getInstance();
105 assertEquals(6, cache.getOpenFiles());
106 assertEquals(17346, cache.getOpenBytes());
107 }
108
109 @Test
110 public void testCache_TooFewFiles() throws IOException {
111 final WindowCacheConfig cfg = new WindowCacheConfig();
112 cfg.setPackedGitOpenFiles(2);
113 cfg.install();
114 doCacheTests();
115 checkLimits(cfg);
116 }
117
118 @Test
119 public void testCache_TooSmallLimit() throws IOException {
120 final WindowCacheConfig cfg = new WindowCacheConfig();
121 cfg.setPackedGitWindowSize(4096);
122 cfg.setPackedGitLimit(4096);
123 cfg.install();
124 doCacheTests();
125 checkLimits(cfg);
126 }
127
128 private static void checkLimits(WindowCacheConfig cfg) {
129 final WindowCache cache = WindowCache.getInstance();
130 assertTrue(cache.getOpenFiles() <= cfg.getPackedGitOpenFiles());
131 assertTrue(cache.getOpenBytes() <= cfg.getPackedGitLimit());
132 assertTrue(0 < cache.getOpenFiles());
133 assertTrue(0 < cache.getOpenBytes());
134 }
135
136 private void doCacheTests() throws IOException {
137 for (TestObject o : toLoad) {
138 final ObjectLoader or = db.open(o.id, o.type);
139 assertNotNull(or);
140 assertEquals(o.type, or.getType());
141 }
142 }
143
144 private static class TestObject {
145 ObjectId id;
146
147 int type;
148
149 void setType(String typeStr) throws CorruptObjectException {
150 final byte[] typeRaw = Constants.encode(typeStr + " ");
151 final MutableInteger ptr = new MutableInteger();
152 type = Constants.decodeTypeString(id, typeRaw, (byte) ' ', ptr);
153 }
154 }
155 }