Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/java/core/src/test/java/com/google/protobuf/ByteBufferWriterTest.java

Index: third_party/protobuf/java/core/src/test/java/com/google/protobuf/ByteBufferWriterTest.java
diff --git a/third_party/protobuf/java/src/main/java/com/google/protobuf/UnsafeByteStrings.java b/third_party/protobuf/java/core/src/test/java/com/google/protobuf/ByteBufferWriterTest.java
similarity index 56%
rename from third_party/protobuf/java/src/main/java/com/google/protobuf/UnsafeByteStrings.java
rename to third_party/protobuf/java/core/src/test/java/com/google/protobuf/ByteBufferWriterTest.java
index c1997515d0fc8ac03078aecb027c3d1246ff564f..cbe742e5b91f3b5822de7d189d7953d768af4a22 100644
--- a/third_party/protobuf/java/src/main/java/com/google/protobuf/UnsafeByteStrings.java
+++ b/third_party/protobuf/java/core/src/test/java/com/google/protobuf/ByteBufferWriterTest.java
@@ -30,26 +30,52 @@
 
 package com.google.protobuf;
 
+import junit.framework.TestCase;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
 import java.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.Random;
 
 /**
- * Provides unsafe factory methods for {@link ByteString} instances.
- *
- * <p><strong>DISCLAIMER:</strong> The methods in this class should only be called if it is
- * guaranteed that the the buffer backing the {@link ByteString} will never change! Mutation of a
- * {@link ByteString} can lead to unexpected and undesirable consequences in your application,
- * and will likely be difficult to debug. Proceed with caution!
+ * Tests for {@link ByteBufferWriter}.
  */
-public final class UnsafeByteStrings {
-  private UnsafeByteStrings() {}
-
-  /**
-   * An unsafe operation that returns a {@link ByteString} that is backed by the provided buffer.
-   *
-   * @param buffer the Java NIO buffer to be wrapped.
-   * @return a {@link ByteString} backed by the provided buffer.
-   */
-  public static ByteString unsafeWrap(ByteBuffer buffer) {
-    return new NioByteString(buffer);
+public class ByteBufferWriterTest extends TestCase {
+
+  public void testHeapBuffer() throws IOException {
+    // Test a small and large buffer.
+    testWrite(ByteBuffer.allocate(100));
+    testWrite(ByteBuffer.allocate(1024 * 100));
+  }
+
+  public void testDirectBuffer() throws IOException {
+    // Test a small and large buffer.
+    testWrite(ByteBuffer.allocateDirect(100));
+    testWrite(ByteBuffer.allocateDirect(1024 * 100));
+  }
+
+  private void testWrite(ByteBuffer buffer) throws IOException {
+    fillRandom(buffer);
+    ByteArrayOutputStream os = new ByteArrayOutputStream(buffer.remaining());
+    ByteBufferWriter.write(buffer, os);
+    assertEquals(0, buffer.position());
+    assertTrue(Arrays.equals(toArray(buffer), os.toByteArray()));
+  }
+
+  private void fillRandom(ByteBuffer buf) {
+    byte[] bytes = new byte[buf.remaining()];
+    new Random().nextBytes(bytes);
+    buf.put(bytes);
+    buf.flip();
+    return;
+  }
+
+  private byte[] toArray(ByteBuffer buf) {
+    int originalPosition = buf.position();
+    byte[] bytes = new byte[buf.remaining()];
+    buf.get(bytes);
+    buf.position(originalPosition);
+    return bytes;
   }
 }