Add a few initial tests for SimpleDecoderAudioRenderer

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=170318174

library/core/src/test/java/com/google/android/exoplayer2/audio/SimpleDecoderAudioRendererTest.java

+/*
+ * Copyright (C) 2017 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.google.android.exoplayer2.audio;
+
+import static com.google.android.exoplayer2.RendererCapabilities.ADAPTIVE_NOT_SEAMLESS;
+import static com.google.android.exoplayer2.RendererCapabilities.FORMAT_HANDLED;
+import static com.google.android.exoplayer2.RendererCapabilities.TUNNELING_NOT_SUPPORTED;
+import static com.google.android.exoplayer2.RendererCapabilities.TUNNELING_SUPPORTED;
+import static com.google.common.truth.Truth.assertThat;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.Format;
+import com.google.android.exoplayer2.RendererConfiguration;
+import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
+import com.google.android.exoplayer2.decoder.SimpleDecoder;
+import com.google.android.exoplayer2.decoder.SimpleOutputBuffer;
+import com.google.android.exoplayer2.drm.DrmSessionManager;
+import com.google.android.exoplayer2.drm.ExoMediaCrypto;
+import com.google.android.exoplayer2.testutil.FakeSampleStream;
+import com.google.android.exoplayer2.util.MimeTypes;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.annotation.Config;
+
+/**
+ * Unit test for {@link SimpleDecoderAudioRenderer}.
+ */
+@RunWith(RobolectricTestRunner.class)
+@Config(sdk = Config.TARGET_SDK, manifest = Config.NONE)
+public class SimpleDecoderAudioRendererTest {
+
+  private static final Format FORMAT = Format.createSampleFormat(null, MimeTypes.AUDIO_RAW, 0);
+
+  @Mock private AudioSink mockAudioSink;
+  private SimpleDecoderAudioRenderer audioRenderer;
+
+  @Before
+  public void setUp() throws Exception {
+    MockitoAnnotations.initMocks(this);
+    audioRenderer = new SimpleDecoderAudioRenderer(null, null, null, false, mockAudioSink) {
+      @Override
+      protected int supportsFormatInternal(DrmSessionManager<ExoMediaCrypto> drmSessionManager,
+          Format format) {
+        return FORMAT_HANDLED;
+      }
+
+      @Override
+      protected SimpleDecoder<DecoderInputBuffer, ? extends SimpleOutputBuffer,
+          ? extends AudioDecoderException> createDecoder(Format format, ExoMediaCrypto mediaCrypto)
+          throws AudioDecoderException {
+        return new FakeDecoder();
+      }
+    };
+  }
+
+  @Config(sdk = 19)
+  @Test
+  public void testSupportsFormatAtApi19() {
+    assertThat(audioRenderer.supportsFormat(FORMAT))
+        .isEqualTo(ADAPTIVE_NOT_SEAMLESS | TUNNELING_NOT_SUPPORTED | FORMAT_HANDLED);
+  }
+
+  @Config(sdk = 21)
+  @Test
+  public void testSupportsFormatAtApi21() {
+    // From API 21, tunneling is supported.
+    assertThat(audioRenderer.supportsFormat(FORMAT))
+        .isEqualTo(ADAPTIVE_NOT_SEAMLESS | TUNNELING_SUPPORTED | FORMAT_HANDLED);
+  }
+
+  @Test
+  public void testImmediatelyReadEndOfStreamPlaysAudioSinkToEndOfStream() throws Exception {
+    audioRenderer.enable(RendererConfiguration.DEFAULT, new Format[] {FORMAT},
+        new FakeSampleStream(FORMAT), 0, false, 0);
+    audioRenderer.setCurrentStreamFinal();
+    when(mockAudioSink.isEnded()).thenReturn(true);
+    while (!audioRenderer.isEnded()) {
+      audioRenderer.render(0, 0);
+    }
+    verify(mockAudioSink, times(1)).playToEndOfStream();
+    audioRenderer.disable();
+    verify(mockAudioSink, times(1)).release();
+  }
+
+  private static final class FakeDecoder
+      extends SimpleDecoder<DecoderInputBuffer, SimpleOutputBuffer, AudioDecoderException> {
+
+    public FakeDecoder() {
+      super(new DecoderInputBuffer[1], new SimpleOutputBuffer[1]);
+    }
+
+    @Override
+    public String getName() {
+      return "FakeDecoder";
+    }
+
+    @Override
+    protected DecoderInputBuffer createInputBuffer() {
+      return new DecoderInputBuffer(DecoderInputBuffer.BUFFER_REPLACEMENT_MODE_DISABLED);
+    }
+
+    @Override
+    protected SimpleOutputBuffer createOutputBuffer() {
+      return new SimpleOutputBuffer(this);
+    }
+
+    @Override
+    protected AudioDecoderException decode(DecoderInputBuffer inputBuffer,
+        SimpleOutputBuffer outputBuffer, boolean reset) {
+      if (inputBuffer.isEndOfStream()) {
+        outputBuffer.setFlags(C.BUFFER_FLAG_END_OF_STREAM);
+      }
+      return null;
+    }
+
+  }
+
+}