Move MockitoUtils to testutils and use it for all Mockito set-ups.

In particular this allows to have the workaround for
https://code.google.com/p/dexmaker/issues/detail?id=2 in one place only.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=176340526

extensions/cronet/build.gradle

@@ -40,6 +40,7 @@ dependencies {
     compile files('libs/cronet_impl_common_java.jar')
     compile files('libs/cronet_impl_native_java.jar')
     androidTestCompile project(modulePrefix + 'library')
+    androidTestCompile project(modulePrefix + 'testutils')
     androidTestCompile 'com.google.dexmaker:dexmaker:' + dexmakerVersion
     androidTestCompile 'com.google.dexmaker:dexmaker-mockito:' + dexmakerVersion
     androidTestCompile 'org.mockito:mockito-core:' + mockitoVersion

extensions/cronet/src/androidTest/java/com/google/android/exoplayer2/ext/cronet/ByteArrayUploadDataProviderTest.java

@@ -19,10 +19,10 @@ import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
-import static org.mockito.MockitoAnnotations.initMocks;
 
 import android.support.test.InstrumentationRegistry;
 import android.support.test.runner.AndroidJUnit4;
+import com.google.android.exoplayer2.testutil.MockitoUtil;
 import java.io.IOException;
 import java.nio.ByteBuffer;
 import java.util.Arrays;
@@ -46,9 +46,7 @@ public final class ByteArrayUploadDataProviderTest {
 
   @Before
   public void setUp() {
-    System.setProperty("dexmaker.dexcache",
-        InstrumentationRegistry.getTargetContext().getCacheDir().getPath());
-    initMocks(this);
+    MockitoUtil.setUpMockito(InstrumentationRegistry.getTargetContext(), this);
     byteBuffer = ByteBuffer.allocate(TEST_DATA.length);
     byteArrayUploadDataProvider = new ByteArrayUploadDataProvider(TEST_DATA);
   }

extensions/cronet/src/androidTest/java/com/google/android/exoplayer2/ext/cronet/CronetDataSourceTest.java

@@ -31,13 +31,13 @@ import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
-import static org.mockito.MockitoAnnotations.initMocks;
 
 import android.net.Uri;
 import android.os.ConditionVariable;
 import android.support.test.InstrumentationRegistry;
 import android.support.test.runner.AndroidJUnit4;
 import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.testutil.MockitoUtil;
 import com.google.android.exoplayer2.upstream.DataSpec;
 import com.google.android.exoplayer2.upstream.HttpDataSource;
 import com.google.android.exoplayer2.upstream.HttpDataSource.HttpDataSourceException;
@@ -107,9 +107,7 @@ public final class CronetDataSourceTest {
 
   @Before
   public void setUp() throws Exception {
-    System.setProperty("dexmaker.dexcache",
-        InstrumentationRegistry.getTargetContext().getCacheDir().getPath());
-    initMocks(this);
+    MockitoUtil.setUpMockito(InstrumentationRegistry.getTargetContext(), this);
     dataSourceUnderTest = spy(
         new CronetDataSource(
             mockCronetEngine,

library/core/src/androidTest/java/com/google/android/exoplayer2/drm/OfflineLicenseHelperTest.java

@@ -23,9 +23,9 @@ import android.test.MoreAsserts;
 import android.util.Pair;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.drm.DrmInitData.SchemeData;
+import com.google.android.exoplayer2.testutil.MockitoUtil;
 import java.util.HashMap;
 import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
 
 /**
  * Tests {@link OfflineLicenseHelper}.
@@ -38,7 +38,7 @@ public class OfflineLicenseHelperTest extends InstrumentationTestCase {
 
   @Override
   protected void setUp() throws Exception {
-    setUpMockito(this);
+    MockitoUtil.setUpMockito(this);
     when(mediaDrm.openSession()).thenReturn(new byte[] {1, 2, 3});
     offlineLicenseHelper = new OfflineLicenseHelper<>(C.WIDEVINE_UUID, mediaDrm, mediaDrmCallback,
         null);
@@ -156,14 +156,4 @@ public class OfflineLicenseHelperTest extends InstrumentationTestCase {
         new byte[] {1, 4, 7, 0, 3, 6}));
   }
 
-  /**
-   * Sets up Mockito for an instrumentation test.
-   */
-  private static void setUpMockito(InstrumentationTestCase instrumentationTestCase) {
-    // Workaround for https://code.google.com/p/dexmaker/issues/detail?id=2.
-    System.setProperty("dexmaker.dexcache",
-        instrumentationTestCase.getInstrumentation().getTargetContext().getCacheDir().getPath());
-    MockitoAnnotations.initMocks(instrumentationTestCase);
-  }
-
 }

library/core/src/androidTest/java/com/google/android/exoplayer2/upstream/cache/CachedRegionTrackerTest.java

@@ -17,11 +17,11 @@ package com.google.android.exoplayer2.upstream.cache;
 
 import android.test.InstrumentationTestCase;
 import com.google.android.exoplayer2.extractor.ChunkIndex;
+import com.google.android.exoplayer2.testutil.MockitoUtil;
 import com.google.android.exoplayer2.util.Util;
 import java.io.File;
 import java.io.IOException;
 import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
 
 /**
  * Tests for {@link CachedRegionTracker}.
@@ -46,7 +46,7 @@ public final class CachedRegionTrackerTest extends InstrumentationTestCase {
 
   @Override
   protected void setUp() throws Exception {
-    setUpMockito(this);
+    MockitoUtil.setUpMockito(this);
 
     tracker = new CachedRegionTracker(cache, CACHE_KEY, CHUNK_INDEX);
     cacheDir = Util.createTempDirectory(getInstrumentation().getContext(), "ExoPlayerTest");
@@ -123,14 +123,4 @@ public final class CachedRegionTrackerTest extends InstrumentationTestCase {
     return SimpleCacheSpanTest.createCacheSpan(index, cacheDir, CACHE_KEY, position, length, 0);
   }
 
-  /**
-   * Sets up Mockito for an instrumentation test.
-   */
-  private static void setUpMockito(InstrumentationTestCase instrumentationTestCase) {
-    // Workaround for https://code.google.com/p/dexmaker/issues/detail?id=2.
-    System.setProperty("dexmaker.dexcache",
-        instrumentationTestCase.getInstrumentation().getTargetContext().getCacheDir().getPath());
-    MockitoAnnotations.initMocks(instrumentationTestCase);
-  }
-
 }

library/dash/src/androidTest/java/com/google/android/exoplayer2/source/dash/offline/DashDownloaderTest.java

@@ -27,12 +27,12 @@ import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.offline.DownloadException;
 import com.google.android.exoplayer2.offline.Downloader.ProgressListener;
 import com.google.android.exoplayer2.offline.DownloaderConstructorHelper;
-import com.google.android.exoplayer2.source.dash.MockitoUtil;
 import com.google.android.exoplayer2.source.dash.manifest.DashManifest;
 import com.google.android.exoplayer2.source.dash.manifest.RepresentationKey;
 import com.google.android.exoplayer2.testutil.FakeDataSet;
 import com.google.android.exoplayer2.testutil.FakeDataSource;
 import com.google.android.exoplayer2.testutil.FakeDataSource.Factory;
+import com.google.android.exoplayer2.testutil.MockitoUtil;
 import com.google.android.exoplayer2.testutil.TestUtil;
 import com.google.android.exoplayer2.upstream.DataSpec;
 import com.google.android.exoplayer2.upstream.cache.NoOpCacheEvictor;

testutils/src/main/java/com/google/android/exoplayer2/testutil/MockitoUtil.java

@@ -13,8 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.google.android.exoplayer2.source.dash;
+package com.google.android.exoplayer2.testutil;
 
+import android.content.Context;
 import android.test.InstrumentationTestCase;
 import org.mockito.MockitoAnnotations;
 
@@ -25,6 +26,8 @@ public final class MockitoUtil {
 
   /**
    * Sets up Mockito for an instrumentation test.
+   *
+   * @param instrumentationTestCase The instrumentation test case class.
    */
   public static void setUpMockito(InstrumentationTestCase instrumentationTestCase) {
     // Workaround for https://code.google.com/p/dexmaker/issues/detail?id=2.
@@ -33,6 +36,19 @@ public final class MockitoUtil {
     MockitoAnnotations.initMocks(instrumentationTestCase);
   }
 
+  /**
+   * Sets up Mockito for a JUnit4 test.
+   *
+   * @param targetContext The target context. Usually obtained from
+   *     {@code InstrumentationRegistry.getTargetContext()}
+   * @param testClass The JUnit4 test class.
+   */
+  public static void setUpMockito(Context targetContext, Object testClass) {
+    // Workaround for https://code.google.com/p/dexmaker/issues/detail?id=2.
+    System.setProperty("dexmaker.dexcache", targetContext.getCacheDir().getPath());
+    MockitoAnnotations.initMocks(testClass);
+  }
+
   private MockitoUtil() {}
 
 }