/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package libcore.io;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import junit.framework.TestCase;
import static libcore.io.DiskLruCache.JOURNAL_FILE;
import static libcore.io.DiskLruCache.MAGIC;
import static libcore.io.DiskLruCache.VERSION_1;
import tests.io.MockOs;
public final class DiskLruCacheTest extends TestCase {
private final int appVersion = 100;
private String javaTmpDir;
private File cacheDir;
private File journalFile;
private DiskLruCache cache;
private final MockOs mockOs = new MockOs();
@Override public void setUp() throws Exception {
super.setUp();
javaTmpDir = System.getProperty("java.io.tmpdir");
cacheDir = new File(javaTmpDir, "DiskLruCacheTest");
cacheDir.mkdir();
journalFile = new File(cacheDir, JOURNAL_FILE);
for (File file : cacheDir.listFiles()) {
file.delete();
}
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
mockOs.install();
}
@Override protected void tearDown() throws Exception {
mockOs.uninstall();
cache.close();
super.tearDown();
}
public void testEmptyCache() throws Exception {
cache.close();
assertJournalEquals();
}
public void testWriteAndReadEntry() throws Exception {
DiskLruCache.Editor creator = cache.edit("k1");
creator.set(0, "ABC");
creator.set(1, "DE");
assertNull(creator.getString(0));
assertNull(creator.newInputStream(0));
assertNull(creator.getString(1));
assertNull(creator.newInputStream(1));
creator.commit();
DiskLruCache.Snapshot snapshot = cache.get("k1");
assertEquals("ABC", snapshot.getString(0));
assertEquals("DE", snapshot.getString(1));
}
public void testReadAndWriteEntryAcrossCacheOpenAndClose() throws Exception {
DiskLruCache.Editor creator = cache.edit("k1");
creator.set(0, "A");
creator.set(1, "B");
creator.commit();
cache.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
DiskLruCache.Snapshot snapshot = cache.get("k1");
assertEquals("A", snapshot.getString(0));
assertEquals("B", snapshot.getString(1));
snapshot.close();
}
public void testJournalWithEditAndPublish() throws Exception {
DiskLruCache.Editor creator = cache.edit("k1");
assertJournalEquals("DIRTY k1"); // DIRTY must always be flushed
creator.set(0, "AB");
creator.set(1, "C");
creator.commit();
cache.close();
assertJournalEquals("DIRTY k1", "CLEAN k1 2 1");
}
public void testRevertedNewFileIsRemoveInJournal() throws Exception {
DiskLruCache.Editor creator = cache.edit("k1");
assertJournalEquals("DIRTY k1"); // DIRTY must always be flushed
creator.set(0, "AB");
creator.set(1, "C");
creator.abort();
cache.close();
assertJournalEquals("DIRTY k1", "REMOVE k1");
}
public void testUnterminatedEditIsRevertedOnClose() throws Exception {
cache.edit("k1");
cache.close();
assertJournalEquals("DIRTY k1", "REMOVE k1");
}
public void testJournalDoesNotIncludeReadOfYetUnpublishedValue() throws Exception {
DiskLruCache.Editor creator = cache.edit("k1");
assertNull(cache.get("k1"));
creator.set(0, "A");
creator.set(1, "BC");
creator.commit();
cache.close();
assertJournalEquals("DIRTY k1", "CLEAN k1 1 2");
}
public void testJournalWithEditAndPublishAndRead() throws Exception {
DiskLruCache.Editor k1Creator = cache.edit("k1");
k1Creator.set(0, "AB");
k1Creator.set(1, "C");
k1Creator.commit();
DiskLruCache.Editor k2Creator = cache.edit("k2");
k2Creator.set(0, "DEF");
k2Creator.set(1, "G");
k2Creator.commit();
DiskLruCache.Snapshot k1Snapshot = cache.get("k1");
k1Snapshot.close();
cache.close();
assertJournalEquals("DIRTY k1", "CLEAN k1 2 1",
"DIRTY k2", "CLEAN k2 3 1",
"READ k1");
}
public void testCannotOperateOnEditAfterPublish() throws Exception {
DiskLruCache.Editor editor = cache.edit("k1");
editor.set(0, "A");
editor.set(1, "B");
editor.commit();
assertInoperable(editor);
}
public void testCannotOperateOnEditAfterRevert() throws Exception {
DiskLruCache.Editor editor = cache.edit("k1");
editor.set(0, "A");
editor.set(1, "B");
editor.abort();
assertInoperable(editor);
}
public void testExplicitRemoveAppliedToDiskImmediately() throws Exception {
DiskLruCache.Editor editor = cache.edit("k1");
editor.set(0, "ABC");
editor.set(1, "B");
editor.commit();
File k1 = getCleanFile("k1", 0);
assertEquals("ABC", readFile(k1));
cache.remove("k1");
assertFalse(k1.exists());
}
/**
* Each read sees a snapshot of the file at the time read was called.
* This means that two reads of the same key can see different data.
*/
public void testReadAndWriteOverlapsMaintainConsistency() throws Exception {
DiskLruCache.Editor v1Creator = cache.edit("k1");
v1Creator.set(0, "AAaa");
v1Creator.set(1, "BBbb");
v1Creator.commit();
DiskLruCache.Snapshot snapshot1 = cache.get("k1");
InputStream inV1 = snapshot1.getInputStream(0);
assertEquals('A', inV1.read());
assertEquals('A', inV1.read());
DiskLruCache.Editor v1Updater = cache.edit("k1");
v1Updater.set(0, "CCcc");
v1Updater.set(1, "DDdd");
v1Updater.commit();
DiskLruCache.Snapshot snapshot2 = cache.get("k1");
assertEquals("CCcc", snapshot2.getString(0));
assertEquals("DDdd", snapshot2.getString(1));
snapshot2.close();
assertEquals('a', inV1.read());
assertEquals('a', inV1.read());
assertEquals("BBbb", snapshot1.getString(1));
snapshot1.close();
}
public void testOpenWithDirtyKeyDeletesAllFilesForThatKey() throws Exception {
cache.close();
File cleanFile0 = getCleanFile("k1", 0);
File cleanFile1 = getCleanFile("k1", 1);
File dirtyFile0 = getDirtyFile("k1", 0);
File dirtyFile1 = getDirtyFile("k1", 1);
writeFile(cleanFile0, "A");
writeFile(cleanFile1, "B");
writeFile(dirtyFile0, "C");
writeFile(dirtyFile1, "D");
createJournal("CLEAN k1 1 1", "DIRTY k1");
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
assertFalse(cleanFile0.exists());
assertFalse(cleanFile1.exists());
assertFalse(dirtyFile0.exists());
assertFalse(dirtyFile1.exists());
assertNull(cache.get("k1"));
}
public void testOpenWithInvalidVersionClearsDirectory() throws Exception {
cache.close();
generateSomeGarbageFiles();
createJournalWithHeader(MAGIC, "0", "100", "2", "");
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
assertGarbageFilesAllDeleted();
}
public void testOpenWithInvalidAppVersionClearsDirectory() throws Exception {
cache.close();
generateSomeGarbageFiles();
createJournalWithHeader(MAGIC, "1", "101", "2", "");
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
assertGarbageFilesAllDeleted();
}
public void testOpenWithInvalidValueCountClearsDirectory() throws Exception {
cache.close();
generateSomeGarbageFiles();
createJournalWithHeader(MAGIC, "1", "100", "1", "");
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
assertGarbageFilesAllDeleted();
}
public void testOpenWithInvalidBlankLineClearsDirectory() throws Exception {
cache.close();
generateSomeGarbageFiles();
createJournalWithHeader(MAGIC, "1", "100", "2", "x");
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
assertGarbageFilesAllDeleted();
}
public void testOpenWithInvalidJournalLineClearsDirectory() throws Exception {
cache.close();
generateSomeGarbageFiles();
createJournal("CLEAN k1 1 1", "BOGUS");
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
assertGarbageFilesAllDeleted();
assertNull(cache.get("k1"));
}
public void testOpenWithInvalidFileSizeClearsDirectory() throws Exception {
cache.close();
generateSomeGarbageFiles();
createJournal("CLEAN k1 0000x001 1");
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
assertGarbageFilesAllDeleted();
assertNull(cache.get("k1"));
}
public void testOpenWithTruncatedLineDiscardsThatLine() throws Exception {
cache.close();
writeFile(getCleanFile("k1", 0), "A");
writeFile(getCleanFile("k1", 1), "B");
Writer writer = new FileWriter(journalFile);
writer.write(MAGIC + "\n" + VERSION_1 + "\n100\n2\n\nCLEAN k1 1 1"); // no trailing newline
writer.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
assertNull(cache.get("k1"));
}
public void testOpenWithTooManyFileSizesClearsDirectory() throws Exception {
cache.close();
generateSomeGarbageFiles();
createJournal("CLEAN k1 1 1 1");
cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE);
assertGarbageFilesAllDeleted();
assertNull(cache.get("k1"));
}
public void testKeyWithSpaceNotPermitted() throws Exception {
try {
cache.edit("my key");
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testKeyWithNewlineNotPermitted() throws Exception {
try {
cache.edit("my\nkey");
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testKeyWithCarriageReturnNotPermitted() throws Exception {
try {
cache.edit("my\rkey");
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testNullKeyThrows() throws Exception {
try {
cache.edit(null);
fail();
} catch (NullPointerException expected) {
}
}
public void testCreateNewEntryWithTooFewValuesFails() throws Exception {
DiskLruCache.Editor creator = cache.edit("k1");
creator.set(1, "A");
try {
creator.commit();
fail();
} catch (IllegalStateException expected) {
}
assertFalse(getCleanFile("k1", 0).exists());
assertFalse(getCleanFile("k1", 1).exists());
assertFalse(getDirtyFile("k1", 0).exists());
assertFalse(getDirtyFile("k1", 1).exists());
assertNull(cache.get("k1"));
DiskLruCache.Editor creator2 = cache.edit("k1");
creator2.set(0, "B");
creator2.set(1, "C");
creator2.commit();
}
public void testCreateNewEntryWithMissingFileAborts() throws Exception {
DiskLruCache.Editor creator = cache.edit("k1");
creator.set(0, "A");
creator.set(1, "A");
assertTrue(getDirtyFile("k1", 0).exists());
assertTrue(getDirtyFile("k1", 1).exists());
assertTrue(getDirtyFile("k1", 0).delete());
assertFalse(getDirtyFile("k1", 0).exists());
creator.commit(); // silently abort if file does not exist due to I/O issue
assertFalse(getCleanFile("k1", 0).exists());
assertFalse(getCleanFile("k1", 1).exists());
assertFalse(getDirtyFile("k1", 0).exists());
assertFalse(getDirtyFile("k1", 1).exists());
assertNull(cache.get("k1"));
DiskLruCache.Editor creator2 = cache.edit("k1");
creator2.set(0, "B");
creator2.set(1, "C");
creator2.commit();
}
public void testRevertWithTooFewValues() throws Exception {
DiskLruCache.Editor creator = cache.edit("k1");
creator.set(1, "A");
creator.abort();
assertFalse(getCleanFile("k1", 0).exists());
assertFalse(getCleanFile("k1", 1).exists());
assertFalse(getDirtyFile("k1", 0).exists());
assertFalse(getDirtyFile("k1", 1).exists());
assertNull(cache.get("k1"));
}
public void testUpdateExistingEntryWithTooFewValuesReusesPreviousValues() throws Exception {
DiskLruCache.Editor creator = cache.edit("k1");
creator.set(0, "A");
creator.set(1, "B");
creator.commit();
DiskLruCache.Editor updater = cache.edit("k1");
updater.set(0, "C");
updater.commit();
DiskLruCache.Snapshot snapshot = cache.get("k1");
assertEquals("C", snapshot.getString(0));
assertEquals("B", snapshot.getString(1));
snapshot.close();
}
public void testEvictOnInsert() throws Exception {
cache.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, 10);
set("A", "a", "aaa"); // size 4
set("B", "bb", "bbbb"); // size 6
assertEquals(10, cache.size());
// cause the size to grow to 12 should evict 'A'
set("C", "c", "c");
cache.flush();
assertEquals(8, cache.size());
assertAbsent("A");
assertValue("B", "bb", "bbbb");
assertValue("C", "c", "c");
// causing the size to grow to 10 should evict nothing
set("D", "d", "d");
cache.flush();
assertEquals(10, cache.size());
assertAbsent("A");
assertValue("B", "bb", "bbbb");
assertValue("C", "c", "c");
assertValue("D", "d", "d");
// causing the size to grow to 18 should evict 'B' and 'C'
set("E", "eeee", "eeee");
cache.flush();
assertEquals(10, cache.size());
assertAbsent("A");
assertAbsent("B");
assertAbsent("C");
assertValue("D", "d", "d");
assertValue("E", "eeee", "eeee");
}
public void testEvictOnUpdate() throws Exception {
cache.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, 10);
set("A", "a", "aa"); // size 3
set("B", "b", "bb"); // size 3
set("C", "c", "cc"); // size 3
assertEquals(9, cache.size());
// causing the size to grow to 11 should evict 'A'
set("B", "b", "bbbb");
cache.flush();
assertEquals(8, cache.size());
assertAbsent("A");
assertValue("B", "b", "bbbb");
assertValue("C", "c", "cc");
}
public void testEvictionHonorsLruFromCurrentSession() throws Exception {
cache.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, 10);
set("A", "a", "a");
set("B", "b", "b");
set("C", "c", "c");
set("D", "d", "d");
set("E", "e", "e");
cache.get("B").close(); // 'B' is now least recently used
// causing the size to grow to 12 should evict 'A'
set("F", "f", "f");
// causing the size to grow to 12 should evict 'C'
set("G", "g", "g");
cache.flush();
assertEquals(10, cache.size());
assertAbsent("A");
assertValue("B", "b", "b");
assertAbsent("C");
assertValue("D", "d", "d");
assertValue("E", "e", "e");
assertValue("F", "f", "f");
}
public void testEvictionHonorsLruFromPreviousSession() throws Exception {
set("A", "a", "a");
set("B", "b", "b");
set("C", "c", "c");
set("D", "d", "d");
set("E", "e", "e");
set("F", "f", "f");
cache.get("B").close(); // 'B' is now least recently used
assertEquals(12, cache.size());
cache.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, 10);
set("G", "g", "g");
cache.flush();
assertEquals(10, cache.size());
assertAbsent("A");
assertValue("B", "b", "b");
assertAbsent("C");
assertValue("D", "d", "d");
assertValue("E", "e", "e");
assertValue("F", "f", "f");
assertValue("G", "g", "g");
}
public void testCacheSingleEntryOfSizeGreaterThanMaxSize() throws Exception {
cache.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, 10);
set("A", "aaaaa", "aaaaaa"); // size=11
cache.flush();
assertAbsent("A");
}
public void testCacheSingleValueOfSizeGreaterThanMaxSize() throws Exception {
cache.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, 10);
set("A", "aaaaaaaaaaa", "a"); // size=12
cache.flush();
assertAbsent("A");
}
public void testConstructorDoesNotAllowZeroCacheSize() throws Exception {
try {
DiskLruCache.open(cacheDir, appVersion, 2, 0);
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testConstructorDoesNotAllowZeroValuesPerEntry() throws Exception {
try {
DiskLruCache.open(cacheDir, appVersion, 0, 10);
fail();
} catch (IllegalArgumentException expected) {
}
}
public void testRemoveAbsentElement() throws Exception {
cache.remove("A");
}
public void testReadingTheSameStreamMultipleTimes() throws Exception {
set("A", "a", "b");
DiskLruCache.Snapshot snapshot = cache.get("A");
assertSame(snapshot.getInputStream(0), snapshot.getInputStream(0));
snapshot.close();
}
public void testRebuildJournalOnRepeatedReads() throws Exception {
set("A", "a", "a");
set("B", "b", "b");
long lastJournalLength = 0;
while (true) {
long journalLength = journalFile.length();
assertValue("A", "a", "a");
assertValue("B", "b", "b");
if (journalLength < lastJournalLength) {
System.out.printf("Journal compacted from %s bytes to %s bytes\n",
lastJournalLength, journalLength);
break; // test passed!
}
lastJournalLength = journalLength;
}
}
public void testRebuildJournalOnRepeatedEdits() throws Exception {
long lastJournalLength = 0;
while (true) {
long journalLength = journalFile.length();
set("A", "a", "a");
set("B", "b", "b");
if (journalLength < lastJournalLength) {
System.out.printf("Journal compacted from %s bytes to %s bytes\n",
lastJournalLength, journalLength);
break;
}
lastJournalLength = journalLength;
}
// sanity check that a rebuilt journal behaves normally
assertValue("A", "a", "a");
assertValue("B", "b", "b");
}
public void testOpenCreatesDirectoryIfNecessary() throws Exception {
cache.close();
File dir = new File(javaTmpDir, "testOpenCreatesDirectoryIfNecessary");
cache = DiskLruCache.open(dir, appVersion, 2, Integer.MAX_VALUE);
set("A", "a", "a");
assertTrue(new File(dir, "A.0").exists());
assertTrue(new File(dir, "A.1").exists());
assertTrue(new File(dir, "journal").exists());
}
public void testFileDeletedExternally() throws Exception {
set("A", "a", "a");
getCleanFile("A", 1).delete();
assertNull(cache.get("A"));
}
public void testFileBecomesInaccessibleDuringReadResultsInIoException() throws Exception {
set("A", "aaaaa", "a");
DiskLruCache.Snapshot snapshot = cache.get("A");
InputStream in = snapshot.getInputStream(0);
assertEquals('a', in.read());
mockOs.enqueueFault("read");
try {
in.read();
fail();
} catch (IOException expected) {
}
snapshot.close();
}
public void testFileBecomesInaccessibleDuringWriteIsSilentlyDiscarded() throws Exception {
set("A", "a", "a");
DiskLruCache.Editor editor = cache.edit("A");
OutputStream out0 = editor.newOutputStream(0);
out0.write('b');
out0.close();
OutputStream out1 = editor.newOutputStream(1);
out1.write('c');
mockOs.enqueueFault("write");
out1.write('c'); // this doesn't throw...
out1.close();
editor.commit(); // ... but this will abort
assertAbsent("A");
}
public void testEditSameVersion() throws Exception {
set("A", "a", "a");
DiskLruCache.Snapshot snapshot = cache.get("A");
DiskLruCache.Editor editor = snapshot.edit();
editor.set(1, "a2");
editor.commit();
assertValue("A", "a", "a2");
}
public void testEditSnapshotAfterChangeAborted() throws Exception {
set("A", "a", "a");
DiskLruCache.Snapshot snapshot = cache.get("A");
DiskLruCache.Editor toAbort = snapshot.edit();
toAbort.set(0, "b");
toAbort.abort();
DiskLruCache.Editor editor = snapshot.edit();
editor.set(1, "a2");
editor.commit();
assertValue("A", "a", "a2");
}
public void testEditSnapshotAfterChangeCommitted() throws Exception {
set("A", "a", "a");
DiskLruCache.Snapshot snapshot = cache.get("A");
DiskLruCache.Editor toAbort = snapshot.edit();
toAbort.set(0, "b");
toAbort.commit();
assertNull(snapshot.edit());
}
public void testEditSinceEvicted() throws Exception {
cache.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, 10);
set("A", "aa", "aaa"); // size 5
DiskLruCache.Snapshot snapshot = cache.get("A");
set("B", "bb", "bbb"); // size 5
set("C", "cc", "ccc"); // size 5; will evict 'A'
cache.flush();
assertNull(snapshot.edit());
}
public void testEditSinceEvictedAndRecreated() throws Exception {
cache.close();
cache = DiskLruCache.open(cacheDir, appVersion, 2, 10);
set("A", "aa", "aaa"); // size 5
DiskLruCache.Snapshot snapshot = cache.get("A");
set("B", "bb", "bbb"); // size 5
set("C", "cc", "ccc"); // size 5; will evict 'A'
set("A", "a", "aaaa"); // size 5; will evict 'B'
cache.flush();
assertNull(snapshot.edit());
}
private void assertJournalEquals(String... expectedBodyLines) throws Exception {
List<String> expectedLines = new ArrayList<String>();
expectedLines.add(MAGIC);
expectedLines.add(VERSION_1);
expectedLines.add("100");
expectedLines.add("2");
expectedLines.add("");
expectedLines.addAll(Arrays.asList(expectedBodyLines));
assertEquals(expectedLines, readJournalLines());
}
private void createJournal(String... bodyLines) throws Exception {
createJournalWithHeader(MAGIC, VERSION_1, "100", "2", "", bodyLines);
}
private void createJournalWithHeader(String magic, String version, String appVersion,
String valueCount, String blank, String... bodyLines) throws Exception {
Writer writer = new FileWriter(journalFile);
writer.write(magic + "\n");
writer.write(version + "\n");
writer.write(appVersion + "\n");
writer.write(valueCount + "\n");
writer.write(blank + "\n");
for (String line : bodyLines) {
writer.write(line);
writer.write('\n');
}
writer.close();
}
private List<String> readJournalLines() throws Exception {
List<String> result = new ArrayList<String>();
BufferedReader reader = new BufferedReader(new FileReader(journalFile));
String line;
while ((line = reader.readLine()) != null) {
result.add(line);
}
reader.close();
return result;
}
private File getCleanFile(String key, int index) {
return new File(cacheDir, key + "." + index);
}
private File getDirtyFile(String key, int index) {
return new File(cacheDir, key + "." + index + ".tmp");
}
private String readFile(File file) throws Exception {
Reader reader = new FileReader(file);
StringWriter writer = new StringWriter();
char[] buffer = new char[1024];
int count;
while ((count = reader.read(buffer)) != -1) {
writer.write(buffer, 0, count);
}
reader.close();
return writer.toString();
}
public void writeFile(File file, String content) throws Exception {
FileWriter writer = new FileWriter(file);
writer.write(content);
writer.close();
}
private void assertInoperable(DiskLruCache.Editor editor) throws Exception {
try {
editor.getString(0);
fail();
} catch (IllegalStateException expected) {
}
try {
editor.set(0, "A");
fail();
} catch (IllegalStateException expected) {
}
try {
editor.newInputStream(0);
fail();
} catch (IllegalStateException expected) {
}
try {
editor.newOutputStream(0);
fail();
} catch (IllegalStateException expected) {
}
try {
editor.commit();
fail();
} catch (IllegalStateException expected) {
}
try {
editor.abort();
fail();
} catch (IllegalStateException expected) {
}
}
private void generateSomeGarbageFiles() throws Exception {
File dir1 = new File(cacheDir, "dir1");
File dir2 = new File(dir1, "dir2");
writeFile(getCleanFile("g1", 0), "A");
writeFile(getCleanFile("g1", 1), "B");
writeFile(getCleanFile("g2", 0), "C");
writeFile(getCleanFile("g2", 1), "D");
writeFile(getCleanFile("g2", 1), "D");
writeFile(new File(cacheDir, "otherFile0"), "E");
dir1.mkdir();
dir2.mkdir();
writeFile(new File(dir2, "otherFile1"), "F");
}
private void assertGarbageFilesAllDeleted() throws Exception {
assertFalse(getCleanFile("g1", 0).exists());
assertFalse(getCleanFile("g1", 1).exists());
assertFalse(getCleanFile("g2", 0).exists());
assertFalse(getCleanFile("g2", 1).exists());
assertFalse(new File(cacheDir, "otherFile0").exists());
assertFalse(new File(cacheDir, "dir1").exists());
}
private void set(String key, String value0, String value1) throws Exception {
DiskLruCache.Editor editor = cache.edit(key);
editor.set(0, value0);
editor.set(1, value1);
editor.commit();
}
private void assertAbsent(String key) throws Exception {
DiskLruCache.Snapshot snapshot = cache.get(key);
if (snapshot != null) {
snapshot.close();
fail();
}
assertFalse(getCleanFile(key, 0).exists());
assertFalse(getCleanFile(key, 1).exists());
assertFalse(getDirtyFile(key, 0).exists());
assertFalse(getDirtyFile(key, 1).exists());
}
private void assertValue(String key, String value0, String value1) throws Exception {
DiskLruCache.Snapshot snapshot = cache.get(key);
assertEquals(value0, snapshot.getString(0));
assertEquals(value1, snapshot.getString(1));
assertTrue(getCleanFile(key, 0).exists());
assertTrue(getCleanFile(key, 1).exists());
snapshot.close();
}
}