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diff --git a/third_party/protobuf/3.4.0/java/core/src/test/java/com/google/protobuf/LazyMessageLiteTest.java b/third_party/protobuf/3.4.0/java/core/src/test/java/com/google/protobuf/LazyMessageLiteTest.java
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+++ b/third_party/protobuf/3.4.0/java/core/src/test/java/com/google/protobuf/LazyMessageLiteTest.java
@@ -0,0 +1,335 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2008 Google Inc.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package com.google.protobuf;
+
+import protobuf_unittest.LazyFieldsLite.LazyExtension;
+import protobuf_unittest.LazyFieldsLite.LazyInnerMessageLite;
+import protobuf_unittest.LazyFieldsLite.LazyMessageLite;
+import protobuf_unittest.LazyFieldsLite.LazyNestedInnerMessageLite;
+import java.util.ArrayList;
+import junit.framework.TestCase;
+
+/**
+ * Unit test for messages with lazy fields.
+ *
+ * @author niwasaki@google.com (Naoki Iwasaki)
+ */
+public class LazyMessageLiteTest extends TestCase {
+
+  private Parser<LazyInnerMessageLite> originalLazyInnerMessageLiteParser;
+
+  @Override
+  protected void setUp() throws Exception {
+    super.setUp();
+  }
+
+  @Override
+  protected void tearDown() throws Exception {
+    super.tearDown();
+  }
+
+  public void testSetValues() {
+    LazyNestedInnerMessageLite nested = LazyNestedInnerMessageLite.newBuilder()
+        .setNum(3)
+        .build();
+    LazyInnerMessageLite inner = LazyInnerMessageLite.newBuilder()
+        .setNum(2)
+        .setNested(nested)
+        .build();
+    LazyMessageLite outer = LazyMessageLite.newBuilder()
+        .setNum(1)
+        .setInner(inner)
+        .setOneofNum(123)
+        .setOneofInner(inner)
+        .build();
+
+    assertEquals(1, outer.getNum());
+    assertEquals(421, outer.getNumWithDefault());
+
+    assertEquals(2, outer.getInner().getNum());
+    assertEquals(42, outer.getInner().getNumWithDefault());
+
+    assertEquals(3, outer.getInner().getNested().getNum());
+    assertEquals(4, outer.getInner().getNested().getNumWithDefault());
+
+    assertFalse(outer.hasOneofNum());
+    assertTrue(outer.hasOneofInner());
+
+    assertEquals(2, outer.getOneofInner().getNum());
+    assertEquals(42, outer.getOneofInner().getNumWithDefault());
+    assertEquals(3, outer.getOneofInner().getNested().getNum());
+    assertEquals(4, outer.getOneofInner().getNested().getNumWithDefault());
+  }
+
+  public void testSetRepeatedValues() {
+    LazyMessageLite outer = LazyMessageLite.newBuilder()
+        .setNum(1)
+        .addRepeatedInner(LazyInnerMessageLite.newBuilder().setNum(119))
+        .addRepeatedInner(LazyInnerMessageLite.newBuilder().setNum(122))
+        .build();
+
+    assertEquals(1, outer.getNum());
+    assertEquals(2, outer.getRepeatedInnerCount());
+    assertEquals(119, outer.getRepeatedInner(0).getNum());
+    assertEquals(122, outer.getRepeatedInner(1).getNum());
+  }
+  
+  public void testRepeatedMutability() throws Exception {
+    LazyMessageLite outer = LazyMessageLite.newBuilder()
+        .addRepeatedInner(LazyInnerMessageLite.newBuilder().setNum(119))
+        .addRepeatedInner(LazyInnerMessageLite.newBuilder().setNum(122))
+        .build();
+    
+    outer = LazyMessageLite.parseFrom(outer.toByteArray());
+    try {
+      outer.getRepeatedInnerList().set(1, null);
+      fail();
+    } catch (UnsupportedOperationException expected) {}
+  }
+
+  public void testAddAll() {
+    ArrayList<LazyInnerMessageLite> inners = new ArrayList<LazyInnerMessageLite>();
+    int count = 4;
+    for (int i = 0; i < count; i++) {
+      LazyInnerMessageLite inner = LazyInnerMessageLite.newBuilder()
+          .setNum(i)
+          .build();
+      inners.add(inner);
+    }
+
+    LazyMessageLite outer = LazyMessageLite.newBuilder()
+        .addAllRepeatedInner(inners)
+        .build();
+    assertEquals(count, outer.getRepeatedInnerCount());
+    for (int i = 0; i < count; i++) {
+      assertEquals(i, outer.getRepeatedInner(i).getNum());
+    }
+  }
+
+  public void testGetDefaultValues() {
+    LazyMessageLite outer = LazyMessageLite.newBuilder()
+        .build();
+
+    assertEquals(0, outer.getNum());
+    assertEquals(421, outer.getNumWithDefault());
+
+    assertEquals(0, outer.getInner().getNum());
+    assertEquals(42, outer.getInner().getNumWithDefault());
+
+    assertEquals(0, outer.getInner().getNested().getNum());
+    assertEquals(4, outer.getInner().getNested().getNumWithDefault());
+
+    assertEquals(0, outer.getOneofNum());
+
+    assertEquals(0, outer.getOneofInner().getNum());
+    assertEquals(42, outer.getOneofInner().getNumWithDefault());
+    assertEquals(0, outer.getOneofInner().getNested().getNum());
+    assertEquals(4, outer.getOneofInner().getNested().getNumWithDefault());
+  }
+
+  public void testClearValues() {
+    LazyInnerMessageLite inner = LazyInnerMessageLite.newBuilder()
+        .setNum(115)
+        .build();
+
+    LazyMessageLite.Builder outerBuilder = LazyMessageLite.newBuilder();
+
+    assertEquals(0, outerBuilder.build().getNum());
+
+
+    // Set/Clear num
+    outerBuilder.setNum(100);
+
+    assertEquals(100, outerBuilder.build().getNum());
+    assertEquals(421, outerBuilder.build().getNumWithDefault());
+    assertFalse(outerBuilder.build().hasInner());
+
+    outerBuilder.clearNum();
+
+    assertEquals(0, outerBuilder.build().getNum());
+    assertEquals(421, outerBuilder.build().getNumWithDefault());
+    assertFalse(outerBuilder.build().hasInner());
+
+
+    // Set/Clear all
+    outerBuilder.setNum(100)
+        .setInner(inner)
+        .addRepeatedInner(LazyInnerMessageLite.newBuilder().setNum(119))
+        .addRepeatedInner(LazyInnerMessageLite.newBuilder().setNum(122))
+        .setOneofInner(LazyInnerMessageLite.newBuilder().setNum(123));
+
+    LazyMessageLite outer = outerBuilder.build();
+    assertEquals(100, outer.getNum());
+    assertEquals(421, outer.getNumWithDefault());
+    assertTrue(outer.hasInner());
+    assertEquals(115, outer.getInner().getNum());
+    assertEquals(2, outer.getRepeatedInnerCount());
+    assertEquals(119, outer.getRepeatedInner(0).getNum());
+    assertEquals(122, outer.getRepeatedInner(1).getNum());
+    assertTrue(outer.hasOneofInner());
+    assertEquals(123, outer.getOneofInner().getNum());
+
+    outerBuilder.clear();
+
+    outer = outerBuilder.build();
+
+    assertEquals(0, outer.getNum());
+    assertEquals(421, outer.getNumWithDefault());
+    assertFalse(outer.hasInner());
+    assertEquals(0, outer.getRepeatedInnerCount());
+    assertFalse(outer.hasOneofInner());
+    assertEquals(0, outer.getOneofInner().getNum());
+  }
+
+  public void testMergeValues() {
+    LazyMessageLite outerBase = LazyMessageLite.newBuilder()
+        .setNumWithDefault(122)
+        .build();
+
+    LazyInnerMessageLite innerMerging = LazyInnerMessageLite.newBuilder()
+        .setNum(115)
+        .build();
+    LazyMessageLite outerMerging = LazyMessageLite.newBuilder()
+        .setNum(119)
+        .setInner(innerMerging)
+        .setOneofInner(innerMerging)
+        .build();
+
+    LazyMessageLite merged = LazyMessageLite
+        .newBuilder(outerBase)
+        .mergeFrom(outerMerging)
+        .build();
+    assertEquals(119, merged.getNum());
+    assertEquals(122, merged.getNumWithDefault());
+    assertEquals(115, merged.getInner().getNum());
+    assertEquals(42, merged.getInner().getNumWithDefault());
+    assertEquals(115, merged.getOneofInner().getNum());
+    assertEquals(42, merged.getOneofInner().getNumWithDefault());
+  }
+
+  public void testMergeDefaultValues() {
+    LazyInnerMessageLite innerBase = LazyInnerMessageLite.newBuilder()
+        .setNum(115)
+        .build();
+    LazyMessageLite outerBase = LazyMessageLite.newBuilder()
+        .setNum(119)
+        .setNumWithDefault(122)
+        .setInner(innerBase)
+        .setOneofInner(innerBase)
+        .build();
+
+    LazyMessageLite outerMerging = LazyMessageLite.newBuilder()
+        .build();
+
+    LazyMessageLite merged = LazyMessageLite
+        .newBuilder(outerBase)
+        .mergeFrom(outerMerging)
+        .build();
+    // Merging default-instance shouldn't overwrite values in the base message.
+    assertEquals(119, merged.getNum());
+    assertEquals(122, merged.getNumWithDefault());
+    assertEquals(115, merged.getInner().getNum());
+    assertEquals(42, merged.getInner().getNumWithDefault());
+    assertEquals(115, merged.getOneofInner().getNum());
+    assertEquals(42, merged.getOneofInner().getNumWithDefault());
+  }
+
+  // Regression test for b/28198805.
+  public void testMergeOneofMessages() throws Exception {
+    LazyInnerMessageLite inner = LazyInnerMessageLite.newBuilder().build();
+    LazyMessageLite outer = LazyMessageLite.newBuilder().setOneofInner(inner).build();
+    ByteString data1 = outer.toByteString();
+
+    // The following should not alter the content of the 'outer' message.
+    LazyMessageLite.Builder merged = LazyMessageLite.newBuilder().mergeFrom(outer);
+    LazyInnerMessageLite anotherInner = LazyInnerMessageLite.newBuilder().setNum(12345).build();
+    merged.setOneofInner(anotherInner);
+
+    // Check that the 'outer' stays the same.
+    ByteString data2 = outer.toByteString();
+    assertEquals(data1, data2);
+    assertEquals(0, outer.getOneofInner().getNum());
+  }
+
+  public void testSerialize() throws InvalidProtocolBufferException {
+    LazyNestedInnerMessageLite nested = LazyNestedInnerMessageLite.newBuilder()
+        .setNum(3)
+        .build();
+    LazyInnerMessageLite inner = LazyInnerMessageLite.newBuilder()
+        .setNum(2)
+        .setNested(nested)
+        .build();
+    LazyMessageLite outer = LazyMessageLite.newBuilder()
+        .setNum(1)
+        .setInner(inner)
+        .setOneofInner(inner)
+        .build();
+
+    ByteString bytes = outer.toByteString();
+    assertEquals(bytes.size(), outer.getSerializedSize());
+
+    LazyMessageLite deserialized = LazyMessageLite.parseFrom(bytes);
+
+    assertEquals(1, deserialized.getNum());
+    assertEquals(421,  deserialized.getNumWithDefault());
+
+    assertEquals(2,  deserialized.getInner().getNum());
+    assertEquals(42,  deserialized.getInner().getNumWithDefault());
+
+    assertEquals(3,  deserialized.getInner().getNested().getNum());
+    assertEquals(4,  deserialized.getInner().getNested().getNumWithDefault());
+
+    assertEquals(2,  deserialized.getOneofInner().getNum());
+    assertEquals(42,  deserialized.getOneofInner().getNumWithDefault());
+    assertEquals(3,  deserialized.getOneofInner().getNested().getNum());
+    assertEquals(4,  deserialized.getOneofInner().getNested().getNumWithDefault());
+
+    assertEquals(bytes, deserialized.toByteString());
+  }
+
+  public void testExtensions() throws Exception {
+    LazyInnerMessageLite.Builder innerBuilder = LazyInnerMessageLite.newBuilder();
+    innerBuilder.setExtension(
+        LazyExtension.extension, LazyExtension.newBuilder()
+        .setName("name").build());
+    assertTrue(innerBuilder.hasExtension(LazyExtension.extension));
+    assertEquals("name", innerBuilder.getExtension(LazyExtension.extension).getName());
+
+    LazyInnerMessageLite innerMessage = innerBuilder.build();
+    assertTrue(innerMessage.hasExtension(LazyExtension.extension));
+    assertEquals("name", innerMessage.getExtension(LazyExtension.extension).getName());
+
+    LazyMessageLite lite = LazyMessageLite.newBuilder()
+        .setInner(innerMessage).build();
+    assertTrue(lite.getInner().hasExtension(LazyExtension.extension));
+    assertEquals("name", lite.getInner().getExtension(LazyExtension.extension).getName());
+  }
+}