@Test public void restoreBackupFile() throws Exception { DiskLruCache.Editor creator = cache.edit("k1"); creator.set(0, "ABC"); creator.set(1, "DE"); creator.commit(); cache.close(); assertThat(journalFile.renameTo(journalBkpFile)).isTrue(); assertThat(journalFile.exists()).isFalse(); cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE); DiskLruCache.Value value = cache.get("k1"); assertThat(value.getString(0)).isEqualTo("ABC"); assertThat(value.getLength(0)).isEqualTo(3); assertThat(value.getString(1)).isEqualTo("DE"); assertThat(value.getLength(1)).isEqualTo(2); assertThat(journalBkpFile.exists()).isFalse(); assertThat(journalFile.exists()).isTrue(); }
private void assertValue(String key, String value0, String value1) throws Exception { DiskLruCache.Value value = cache.get(key); assertThat(value.getString(0)).isEqualTo(value0); assertThat(value.getLength(0)).isEqualTo(value0.length()); assertThat(value.getString(1)).isEqualTo(value1); assertThat(value.getLength(1)).isEqualTo(value1.length()); assertThat(getCleanFile(key, 0)).exists(); assertThat(getCleanFile(key, 1)).exists(); } }
@Test public void journalFileIsPreferredOverBackupFile() throws Exception { DiskLruCache.Editor creator = cache.edit("k1"); creator.set(0, "ABC"); creator.set(1, "DE"); creator.commit(); cache.flush(); FileUtils.copyFile(journalFile, journalBkpFile); creator = cache.edit("k2"); creator.set(0, "F"); creator.set(1, "GH"); creator.commit(); cache.close(); assertThat(journalFile.exists()).isTrue(); assertThat(journalBkpFile.exists()).isTrue(); cache = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE); DiskLruCache.Value valueA = cache.get("k1"); assertThat(valueA.getString(0)).isEqualTo("ABC"); assertThat(valueA.getLength(0)).isEqualTo(3); assertThat(valueA.getString(1)).isEqualTo("DE"); assertThat(valueA.getLength(1)).isEqualTo(2); DiskLruCache.Value valueB = cache.get("k2"); assertThat(valueB.getString(0)).isEqualTo("F"); assertThat(valueB.getLength(0)).isEqualTo(1); assertThat(valueB.getString(1)).isEqualTo("GH"); assertThat(valueB.getLength(1)).isEqualTo(2); assertThat(journalBkpFile.exists()).isFalse(); assertThat(journalFile.exists()).isTrue(); }
@Test public void updateExistingEntryWithTooFewValuesReusesPreviousValues() 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.Value value = cache.get("k1"); assertThat(value.getString(0)).isEqualTo("C"); assertThat(value.getLength(0)).isEqualTo(1); assertThat(value.getString(1)).isEqualTo("B"); assertThat(value.getLength(1)).isEqualTo(1); }
@Test public void readAndWriteEntryWithoutProperClose() throws Exception { DiskLruCache.Editor creator = cache.edit("k1"); creator.set(0, "A"); creator.set(1, "B"); creator.commit(); // Simulate a dirty close of 'cache' by opening the cache directory again. DiskLruCache cache2 = DiskLruCache.open(cacheDir, appVersion, 2, Integer.MAX_VALUE); DiskLruCache.Value value = cache2.get("k1"); assertThat(value.getString(0)).isEqualTo("A"); assertThat(value.getLength(0)).isEqualTo(1); assertThat(value.getString(1)).isEqualTo("B"); assertThat(value.getLength(1)).isEqualTo(1); cache2.close(); }
@Test public void readAndWriteEntryAcrossCacheOpenAndClose() 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.Value value = cache.get("k1"); assertThat(value.getString(0)).isEqualTo("A"); assertThat(value.getLength(0)).isEqualTo(1); assertThat(value.getString(1)).isEqualTo("B"); assertThat(value.getLength(1)).isEqualTo(1); }
@Test public void writeAndReadEntry() throws Exception { DiskLruCache.Editor creator = cache.edit("k1"); creator.set(0, "ABC"); creator.set(1, "DE"); assertThat(creator.getString(0)).isNull(); assertThat(creator.getString(1)).isNull(); creator.commit(); DiskLruCache.Value value = cache.get("k1"); assertThat(value.getString(0)).isEqualTo("ABC"); assertThat(value.getLength(0)).isEqualTo(3); assertThat(value.getString(1)).isEqualTo("DE"); assertThat(value.getLength(1)).isEqualTo(2); }