Replace TestUtil.joinByteArrays() with Guava's Bytes.concat()

PiperOrigin-RevId: 312481058

library/common/src/test/java/com/google/android/exoplayer2/metadata/emsg/EventMessageDecoderTest.java

@@ -17,13 +17,13 @@ package com.google.android.exoplayer2.metadata.emsg;
 
 import static com.google.android.exoplayer2.testutil.TestUtil.createByteArray;
 import static com.google.android.exoplayer2.testutil.TestUtil.createMetadataInputBuffer;
-import static com.google.android.exoplayer2.testutil.TestUtil.joinByteArrays;
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.assertThrows;
 
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.metadata.MetadataInputBuffer;
+import com.google.common.primitives.Bytes;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -34,7 +34,7 @@ public final class EventMessageDecoderTest {
   @Test
   public void decodeEventMessage() {
     byte[] rawEmsgBody =
-        joinByteArrays(
+        Bytes.concat(
             createByteArray(117, 114, 110, 58, 116, 101, 115, 116, 0), // scheme_id_uri = "urn:test"
             createByteArray(49, 50, 51, 0), // value = "123"
             createByteArray(0, 0, 11, 184), // event_duration_ms = 3000

library/common/src/test/java/com/google/android/exoplayer2/metadata/emsg/EventMessageEncoderTest.java

@@ -17,12 +17,12 @@ package com.google.android.exoplayer2.metadata.emsg;
 
 import static com.google.android.exoplayer2.testutil.TestUtil.createByteArray;
 import static com.google.android.exoplayer2.testutil.TestUtil.createMetadataInputBuffer;
-import static com.google.android.exoplayer2.testutil.TestUtil.joinByteArrays;
 import static com.google.common.truth.Truth.assertThat;
 
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.metadata.MetadataInputBuffer;
+import com.google.common.primitives.Bytes;
 import java.io.IOException;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -35,7 +35,7 @@ public final class EventMessageEncoderTest {
       new EventMessage("urn:test", "123", 3000, 1000403, new byte[] {0, 1, 2, 3, 4});
 
   private static final byte[] ENCODED_MESSAGE =
-      joinByteArrays(
+      Bytes.concat(
           createByteArray(117, 114, 110, 58, 116, 101, 115, 116, 0), // scheme_id_uri = "urn:test"
           createByteArray(49, 50, 51, 0), // value = "123"
           createByteArray(0, 0, 11, 184), // event_duration_ms = 3000
@@ -64,7 +64,7 @@ public final class EventMessageEncoderTest {
     EventMessage eventMessage1 =
         new EventMessage("urn:test", "123", 3000, 1000402, new byte[] {4, 3, 2, 1, 0});
     byte[] expectedEmsgBody1 =
-        joinByteArrays(
+        Bytes.concat(
             createByteArray(117, 114, 110, 58, 116, 101, 115, 116, 0), // scheme_id_uri = "urn:test"
             createByteArray(49, 50, 51, 0), // value = "123"
             createByteArray(0, 0, 11, 184), // event_duration_ms = 3000

library/core/src/test/java/com/google/android/exoplayer2/mediacodec/BatchBufferTest.java

@@ -23,6 +23,7 @@ import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
 import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.common.primitives.Bytes;
 import java.nio.ByteBuffer;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -153,7 +154,7 @@ public final class BatchBufferTest {
     batchBuffer.commitNextAccessUnit();
     batchBuffer.flip();
 
-    byte[] expected = TestUtil.joinByteArrays(TEST_ACCESS_UNIT, TEST_ACCESS_UNIT);
+    byte[] expected = Bytes.concat(TEST_ACCESS_UNIT, TEST_ACCESS_UNIT);
     assertThat(batchBuffer.data).isEqualTo(ByteBuffer.wrap(expected));
   }
 

library/core/src/test/java/com/google/android/exoplayer2/metadata/MetadataRendererTest.java

@@ -32,6 +32,7 @@ import com.google.android.exoplayer2.testutil.FakeSampleStream.FakeSampleStreamI
 import com.google.android.exoplayer2.testutil.TestUtil;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.MimeTypes;
+import com.google.common.primitives.Bytes;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -43,7 +44,7 @@ import org.junit.runner.RunWith;
 public class MetadataRendererTest {
 
   private static final byte[] SCTE35_TIME_SIGNAL_BYTES =
-      TestUtil.joinByteArrays(
+      Bytes.concat(
           TestUtil.createByteArray(
               0, // table_id.
               0x80, // section_syntax_indicator, private_indicator, reserved, section_length(4).
@@ -170,7 +171,7 @@ public class MetadataRendererTest {
    */
   private static byte[] encodeTxxxId3Frame(String description, String value) {
     byte[] id3FrameData =
-        TestUtil.joinByteArrays(
+        Bytes.concat(
             "TXXX".getBytes(ISO_8859_1), // ID for a 'user defined text information frame'
             TestUtil.createByteArray(0, 0, 0, 0), // Frame size (set later)
             TestUtil.createByteArray(0, 0), // Frame flags
@@ -186,7 +187,7 @@ public class MetadataRendererTest {
     id3FrameData[frameSizeIndex] = (byte) frameSize;
 
     byte[] id3Bytes =
-        TestUtil.joinByteArrays(
+        Bytes.concat(
             "ID3".getBytes(ISO_8859_1), // identifier
             TestUtil.createByteArray(0x04, 0x00), // version
             TestUtil.createByteArray(0), // Tag flags

library/core/src/test/java/com/google/android/exoplayer2/metadata/icy/IcyDecoderTest.java

@@ -26,7 +26,7 @@ import static org.junit.Assert.assertThrows;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.metadata.MetadataInputBuffer;
-import com.google.android.exoplayer2.testutil.TestUtil;
+import com.google.common.primitives.Bytes;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -54,7 +54,7 @@ public final class IcyDecoderTest {
   public void decode_respectsLimit() {
     byte[] icyTitle = "StreamTitle='test title';".getBytes(UTF_8);
     byte[] icyUrl = "StreamURL='test_url';".getBytes(UTF_8);
-    byte[] paddedRawBytes = TestUtil.joinByteArrays(icyTitle, icyUrl);
+    byte[] paddedRawBytes = Bytes.concat(icyTitle, icyUrl);
     MetadataInputBuffer metadataBuffer = createMetadataInputBuffer(paddedRawBytes);
     // Stop before the stream URL.
     metadataBuffer.data.limit(icyTitle.length);

library/core/src/test/java/com/google/android/exoplayer2/source/SampleQueueTest.java

@@ -43,6 +43,7 @@ import com.google.android.exoplayer2.upstream.DefaultAllocator;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.MediaSourceEventDispatcher;
 import com.google.android.exoplayer2.util.ParsableByteArray;
+import com.google.common.primitives.Bytes;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.concurrent.atomic.AtomicReference;
@@ -483,7 +484,7 @@ public final class SampleQueueTest {
     byte[] sampleData = new byte[] {0, 1, 2};
     byte[] initializationVector = new byte[] {7, 6, 5, 4, 3, 2, 1, 0};
     byte[] encryptedSampleData =
-        TestUtil.joinByteArrays(
+        Bytes.concat(
             new byte[] {
               0x08, // subsampleEncryption = false (1 bit), ivSize = 8 (7 bits).
             },

library/extractor/build.gradle

@@ -41,6 +41,7 @@ android {
 dependencies {
     implementation 'androidx.annotation:annotation:' + androidxAnnotationVersion
     implementation project(modulePrefix + 'library-common')
+    implementation 'com.google.guava:guava:' + guavaVersion
     compileOnly 'org.checkerframework:checker-qual:' + checkerframeworkVersion
     compileOnly 'org.checkerframework:checker-compat-qual:' + checkerframeworkVersion
     compileOnly 'org.jetbrains.kotlin:kotlin-annotations-jvm:' + kotlinAnnotationsVersion

library/extractor/src/test/java/com/google/android/exoplayer2/extractor/ogg/DefaultOggSeekerTest.java

@@ -26,6 +26,7 @@ import com.google.android.exoplayer2.extractor.ExtractorInput;
 import com.google.android.exoplayer2.testutil.FakeExtractorInput;
 import com.google.android.exoplayer2.testutil.TestUtil;
 import com.google.android.exoplayer2.util.ParsableByteArray;
+import com.google.common.primitives.Bytes;
 import java.io.EOFException;
 import java.io.IOException;
 import java.util.Random;
@@ -125,7 +126,7 @@ public final class DefaultOggSeekerTest {
   public void skipToNextPage_success() throws Exception {
     FakeExtractorInput extractorInput =
         createInput(
-            TestUtil.joinByteArrays(
+            Bytes.concat(
                 TestUtil.buildTestData(4000, random),
                 new byte[] {'O', 'g', 'g', 'S'},
                 TestUtil.buildTestData(4000, random)),
@@ -138,7 +139,7 @@ public final class DefaultOggSeekerTest {
   public void skipToNextPage_withOverlappingInput_success() throws Exception {
     FakeExtractorInput extractorInput =
         createInput(
-            TestUtil.joinByteArrays(
+            Bytes.concat(
                 TestUtil.buildTestData(2046, random),
                 new byte[] {'O', 'g', 'g', 'S'},
                 TestUtil.buildTestData(4000, random)),
@@ -151,8 +152,7 @@ public final class DefaultOggSeekerTest {
   public void skipToNextPage_withInputShorterThanPeekLength_success() throws Exception {
     FakeExtractorInput extractorInput =
         createInput(
-            TestUtil.joinByteArrays(new byte[] {'x', 'O', 'g', 'g', 'S'}),
-            /* simulateUnknownLength= */ false);
+            Bytes.concat(new byte[] {'x', 'O', 'g', 'g', 'S'}), /* simulateUnknownLength= */ false);
     skipToNextPage(extractorInput);
     assertThat(extractorInput.getPosition()).isEqualTo(1);
   }

library/extractor/src/test/java/com/google/android/exoplayer2/extractor/ts/AdtsReaderTest.java

@@ -25,6 +25,7 @@ import com.google.android.exoplayer2.testutil.FakeExtractorOutput;
 import com.google.android.exoplayer2.testutil.FakeTrackOutput;
 import com.google.android.exoplayer2.testutil.TestUtil;
 import com.google.android.exoplayer2.util.ParsableByteArray;
+import com.google.common.primitives.Bytes;
 import java.util.Arrays;
 import org.junit.Before;
 import org.junit.Test;
@@ -57,7 +58,7 @@ public class AdtsReaderTest {
       TestUtil.createByteArray(0x20, 0x00, 0x20, 0x00, 0x00, 0x80, 0x0e);
 
   private static final byte[] TEST_DATA =
-      TestUtil.joinByteArrays(ID3_DATA_1, ID3_DATA_2, ADTS_HEADER, ADTS_CONTENT);
+      Bytes.concat(ID3_DATA_1, ID3_DATA_2, ADTS_HEADER, ADTS_CONTENT);
 
   private static final long ADTS_SAMPLE_DURATION = 23219L;
 
@@ -94,7 +95,7 @@ public class AdtsReaderTest {
   public void skipToNextSampleResetsState() throws Exception {
     data =
         new ParsableByteArray(
-            TestUtil.joinByteArrays(
+            Bytes.concat(
                 ADTS_HEADER,
                 ADTS_CONTENT,
                 ADTS_HEADER,

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

@@ -27,6 +27,7 @@ import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.Function;
 import com.google.android.exoplayer2.util.ParsableByteArray;
 import com.google.android.exoplayer2.util.Util;
+import com.google.common.primitives.Bytes;
 import java.io.EOFException;
 import java.io.IOException;
 import java.util.ArrayList;
@@ -105,7 +106,7 @@ public final class FakeTrackOutput implements TrackOutput, Dumper.Dumpable {
       throw new EOFException();
     }
     newData = Arrays.copyOf(newData, bytesAppended);
-    sampleData = TestUtil.joinByteArrays(sampleData, newData);
+    sampleData = Bytes.concat(sampleData, newData);
     return bytesAppended;
   }
 
@@ -113,7 +114,7 @@ public final class FakeTrackOutput implements TrackOutput, Dumper.Dumpable {
   public void sampleData(ParsableByteArray data, int length, @SampleDataPart int sampleDataPart) {
     byte[] newData = new byte[length];
     data.readBytes(newData, 0, length);
-    sampleData = TestUtil.joinByteArrays(sampleData, newData);
+    sampleData = Bytes.concat(sampleData, newData);
   }
 
   @Override

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

@@ -168,26 +168,6 @@ public class TestUtil {
     return byteArray;
   }
 
-  /**
-   * Concatenates the provided byte arrays.
-   *
-   * @param byteArrays The byte arrays to concatenate.
-   * @return The concatenated result.
-   */
-  public static byte[] joinByteArrays(byte[]... byteArrays) {
-    int length = 0;
-    for (byte[] byteArray : byteArrays) {
-      length += byteArray.length;
-    }
-    byte[] joined = new byte[length];
-    length = 0;
-    for (byte[] byteArray : byteArrays) {
-      System.arraycopy(byteArray, 0, joined, length, byteArray.length);
-      length += byteArray.length;
-    }
-    return joined;
-  }
-
   /** Writes one byte long dummy test data to the file and returns it. */
   public static File createTestFile(File directory, String name) throws IOException {
     return createTestFile(directory, name, /* length= */ 1);