Add tests for media tuner

Test: atest com.android.mediatunertest
Change-Id: I5d10caf324b34aa390f73376a47a301d042aa132

media/tests/TunerTest/Android.bp

@@ -0,0 +1,18 @@
+android_test {
+    name: "mediatunertest",
+
+    srcs: ["**/*.java"],
+
+    libs: [
+        "android.test.runner",
+        "android.test.base",
+    ],
+
+    static_libs: [
+        "android-support-test",
+        "testng"
+    ],
+
+    platform_apis: true,
+    certificate: "platform",
+}

media/tests/TunerTest/AndroidManifest.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2020 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.android.mediatunertest">
+
+    <uses-permission android:name="android.permission.ACCESS_TV_TUNER" />
+
+    <application android:label="@string/app_name">
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation android:name="android.support.test.runner.AndroidJUnitRunner"
+                     android:targetPackage="com.android.mediatunertest"
+                     android:label="Media Tuner Tests"/>
+</manifest>

media/tests/TunerTest/AndroidTest.xml

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+<configuration description="Runs Media Tuner tests.">
+    <option name="test-suite-tag" value="apct"/>
+    <option name="test-tag" value="MediaTunerTest"/>
+
+    <target_preparer class="com.android.tradefed.targetprep.TestFilePushSetup"/>
+    <target_preparer class="com.android.tradefed.targetprep.TestAppInstallSetup">
+        <option name="test-file-name" value="mediatunertest.apk"/>
+    </target_preparer>
+    <target_preparer class="com.android.tradefed.targetprep.PushFilePreparer"/>
+    <target_preparer class="com.android.tradefed.targetprep.RunCommandTargetPreparer"/>
+
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest">
+        <option name="package" value="com.android.mediatunertest"/>
+        <option name="hidden-api-checks" value="false"/>
+        <option name="runner" value="android.support.test.runner.AndroidJUnitRunner"/>
+    </test>
+</configuration>

media/tests/TunerTest/res/values/strings.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- name of the app [CHAR LIMIT=25]-->
+    <string name="app_name">MediaTunerTest</string>
+</resources>

media/tests/TunerTest/src/com/android/mediatunertest/TunerTest.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2019 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.mediatunertest;
+
+import static org.junit.Assert.assertNotNull;
+
+import android.content.Context;
+import android.media.tv.tuner.Descrambler;
+import android.media.tv.tuner.Tuner;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class TunerTest {
+    private static final String TAG = "MediaTunerTest";
+
+    private Context mContext;
+
+    @Before
+    public void setUp() throws Exception {
+        mContext = InstrumentationRegistry.getTargetContext();
+    }
+
+    @After
+    public void tearDown() {
+    }
+
+    @Test
+    public void testTunerConstructor() throws Exception {
+        Tuner tuner = new Tuner(mContext, "123", 1, null);
+        assertNotNull(tuner);
+    }
+
+    @Test
+    public void testOpenDescrambler() throws Exception {
+        Tuner tuner = new Tuner(mContext, "123", 1, null);
+        Descrambler descrambler = tuner.openDescrambler();
+        assertNotNull(descrambler);
+    }
+}