Add tests for android.media.AudioAttributes' implementation of Parcelable

Bug 20732585

Change-Id: Iaeb0ce01a6dc389699bdd0f9190936e510e8f2a3
diff --git a/tests/tests/media/src/android/media/cts/AudioAttributesTest.java b/tests/tests/media/src/android/media/cts/AudioAttributesTest.java
new file mode 100644
index 0000000..3e42b7e
--- /dev/null
+++ b/tests/tests/media/src/android/media/cts/AudioAttributesTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2015 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 android.media.cts;
+
+import android.cts.util.CtsAndroidTestCase;
+import android.media.AudioAttributes;
+import android.os.Parcel;
+
+public class AudioAttributesTest extends CtsAndroidTestCase {
+
+    // -----------------------------------------------------------------
+    // AUDIOATTRIBUTES TESTS:
+    // ----------------------------------
+
+    // -----------------------------------------------------------------
+    // Parcelable tests
+    // ----------------------------------
+
+    // Test case 1: call describeContents(), not used yet, but needs to be exercised
+    public void testParcelableDescribeContents() throws Exception {
+        final AudioAttributes aa = new AudioAttributes.Builder()
+                .setUsage(AudioAttributes.USAGE_MEDIA).build();
+        final int c = aa.describeContents();
+        assertNotNull("Failure to create the AudioAttributes", aa);
+    }
+
+    // Test case 2: create an instance, marshall it and create a new instance,
+    //      check for equality, both by comparing fields, and with the equals(Object) method
+    public void testParcelableWriteToParcelCreate() throws Exception {
+        final AudioAttributes srcAttr = new AudioAttributes.Builder()
+            .setUsage(AudioAttributes.USAGE_MEDIA)
+            .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
+            .setFlags(AudioAttributes.FLAG_AUDIBILITY_ENFORCED).build();
+        final Parcel srcParcel = Parcel.obtain();
+        final Parcel dstParcel = Parcel.obtain();
+        final byte[] mbytes;
+
+        srcAttr.writeToParcel(srcParcel, 0 /*no public flags for marshalling*/);
+        mbytes = srcParcel.marshall();
+        dstParcel.unmarshall(mbytes, 0, mbytes.length);
+        dstParcel.setDataPosition(0);
+        final AudioAttributes targetAttr = AudioAttributes.CREATOR.createFromParcel(dstParcel);
+
+        assertEquals("Marshalled/restored usage doesn't match",
+                srcAttr.getUsage(), targetAttr.getUsage());
+        assertEquals("Marshalled/restored content type doesn't match",
+                srcAttr.getContentType(), targetAttr.getContentType());
+        assertEquals("Marshalled/restored flags don't match",
+                srcAttr.getFlags(), targetAttr.getFlags());
+        assertTrue("Source and target attributes are not considered equal",
+                srcAttr.equals(targetAttr));
+    }
+}