1 files changed, 89 insertions, 0 deletions
diff --git a/core/src/test/java/com/android/volley/utils/CacheTestUtils.java b/core/src/test/java/com/android/volley/utils/CacheTestUtils.java
new file mode 100644
index 0000000..5980712
--- /dev/null
+++ b/core/src/test/java/com/android/volley/utils/CacheTestUtils.java
@@ -0,0 +1,89 @@
+/*
+ * 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();
+    }
+}