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/*
* Copyright (C) 2016 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 com.android.apkzlib.utils;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;
import com.google.common.base.Charsets;
import com.google.common.io.Files;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import java.io.File;
public class CachedFileContentsTest {
@Rule
public TemporaryFolder mTemporaryFolder = new TemporaryFolder();
@Test
public void createFileAndCheckWithNoChanges() throws Exception {
File f = mTemporaryFolder.newFile("test");
Files.write("abc", f, Charsets.US_ASCII);
Object cache = new Object();
CachedFileContents<Object> cachedFile = new CachedFileContents<>(f);
cachedFile.closed(cache);
assertTrue(cachedFile.isValid());
assertSame(cache, cachedFile.getCache());
}
@Test
public void createFileAndCheckChanges() throws Exception {
File f = mTemporaryFolder.newFile("test");
Files.write("abc", f, Charsets.US_ASCII);
Object cache = new Object();
CachedFileContents<Object> cachedFile = new CachedFileContents<>(f);
cachedFile.closed(cache);
Files.write("def", f, Charsets.US_ASCII);
assertFalse(cachedFile.isValid());
assertNull(cachedFile.getCache());
}
@Test
public void createFileUpdateAndCheckChanges() throws Exception {
File f = mTemporaryFolder.newFile("test");
Files.write("abc", f, Charsets.US_ASCII);
Object cache = new Object();
CachedFileContents<Object> cachedFile = new CachedFileContents<>(f);
cachedFile.closed(cache);
Files.write("def", f, Charsets.US_ASCII);
cachedFile.closed(cache);
assertTrue(cachedFile.isValid());
assertSame(cache, cachedFile.getCache());
}
@Test
public void immediateChangesDetected() throws Exception {
File f = mTemporaryFolder.newFile("foo");
Files.write("bar", f, Charsets.US_ASCII);
CachedFileContents<Object> cachedFile = new CachedFileContents<>(f);
cachedFile.closed(null);
Files.write("xpto", f, Charsets.US_ASCII);
assertFalse(cachedFile.isValid());
}
@Test
public void immediateChangesDetectedEvenWithHackedTs() throws Exception {
File f = mTemporaryFolder.newFile("foo");
Files.write("bar", f, Charsets.US_ASCII);
CachedFileContents<Object> cachedFile = new CachedFileContents<>(f);
cachedFile.closed(null);
long lastTs = f.lastModified();
Files.write("xpto", f, Charsets.US_ASCII);
f.setLastModified(lastTs);
assertFalse(cachedFile.isValid());
}
@Test
public void immediateChangesWithNoContentChangeNotDetected() throws Exception {
File f = mTemporaryFolder.newFile("foo");
Files.write("bar", f, Charsets.US_ASCII);
CachedFileContents<Object> cachedFile = new CachedFileContents<>(f);
cachedFile.closed(null);
long lastTs = f.lastModified();
Files.write("bar", f, Charsets.US_ASCII);
f.setLastModified(lastTs);
assertTrue(cachedFile.isValid());
}
}
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