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/*
* 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 com.android.volley.utils;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertThat;
import com.android.volley.Cache;
import java.util.Random;
public class CacheTestUtils {
/**
* Makes a random cache entry.
*
* @param data Data to use, or null to use random data
* @param isExpired Whether the TTLs should be set such that this entry is expired
* @param needsRefresh Whether the TTLs should be set such that this entry needs refresh
*/
public static Cache.Entry makeRandomCacheEntry(
byte[] data, boolean isExpired, boolean needsRefresh) {
Random random = new Random();
Cache.Entry entry = new Cache.Entry();
if (data != null) {
entry.data = data;
} else {
entry.data = new byte[random.nextInt(1024)];
}
entry.etag = String.valueOf(random.nextLong());
entry.lastModified = random.nextLong();
entry.ttl = isExpired ? 0 : Long.MAX_VALUE;
entry.softTtl = needsRefresh ? 0 : Long.MAX_VALUE;
return entry;
}
/**
* Like {@link #makeRandomCacheEntry(byte[], boolean, boolean)} but defaults to an unexpired
* entry.
*/
public static Cache.Entry makeRandomCacheEntry(byte[] data) {
return makeRandomCacheEntry(data, false, false);
}
public static void assertThatEntriesAreEqual(Cache.Entry actual, Cache.Entry expected) {
assertNotNull(actual);
assertThat(actual.data, is(equalTo(expected.data)));
assertThat(actual.etag, is(equalTo(expected.etag)));
assertThat(actual.lastModified, is(equalTo(expected.lastModified)));
assertThat(actual.responseHeaders, is(equalTo(expected.responseHeaders)));
assertThat(actual.serverDate, is(equalTo(expected.serverDate)));
assertThat(actual.softTtl, is(equalTo(expected.softTtl)));
assertThat(actual.ttl, is(equalTo(expected.ttl)));
}
public static Cache.Entry randomData(int length) {
Cache.Entry entry = new Cache.Entry();
byte[] data = new byte[length];
new Random(42).nextBytes(data); // explicit seed for reproducible results
entry.data = data;
return entry;
}
public static int getEntrySizeOnDisk(String key) {
// Header size is:
// 4 bytes for magic int
// 8 + len(key) bytes for key (long length)
// 8 bytes for etag (long length + 0 characters)
// 32 bytes for serverDate, lastModified, ttl, and softTtl longs
// 4 bytes for length of header list int
// == 56 + len(key) bytes total.
return 56 + key.length();
}
}
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