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package com.bumptech.glide.load.engine.cache;
import com.bumptech.glide.load.Key;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.Robolectric;
import org.robolectric.RobolectricTestRunner;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.util.Arrays;
import static junit.framework.Assert.assertNull;
import static junit.framework.Assert.assertTrue;
@RunWith(RobolectricTestRunner.class)
public class DiskLruCacheWrapperTest {
private File dir;
private DiskLruCacheWrapper cache;
private byte[] data;
private StringKey key;
@Before
public void setUp() {
dir = Robolectric.application.getCacheDir();
cache = new DiskLruCacheWrapper(dir, 10 * 1024 * 1024);
key = new StringKey("test");
data = new byte[] { 1, 2, 3, 4, 5, 6 };
}
@Test
public void testCanInsertAndGet() {
cache.put(key, new DiskCache.Writer() {
@Override
public boolean write(OutputStream os) {
try {
os.write(data);
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
});
byte[] received = isToBytes(cache.get(key), data.length);
assertTrue(Arrays.equals(data, received));
}
@Test
public void testDoesNotCommitIfWriterReturnsFalse() {
cache.put(key, new DiskCache.Writer() {
@Override
public boolean write(OutputStream os) {
return false;
}
});
assertNull(cache.get(key));
}
@Test
public void testDoesNotCommitIfWriterWritesButReturnsFalse() {
cache.put(key, new DiskCache.Writer() {
@Override
public boolean write(OutputStream os) {
try {
os.write(data);
} catch (IOException e) {
e.printStackTrace();
}
return false;
}
});
assertNull(cache.get(key));
}
private static byte[] isToBytes(InputStream is, int length) {
byte[] result = new byte[length];
try {
is.read(result);
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
private static class StringKey implements Key {
private final String key;
public StringKey(String key) {
this.key = key;
}
@Override
public void updateDiskCacheKey(MessageDigest messageDigest) throws UnsupportedEncodingException {
messageDigest.update(key.getBytes());
}
}
}
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