Update //third_party/protobuf to version 3.

third_party/protobuf/java/src/test/java/com/google/protobuf/FieldPresenceTest.java

Index: third_party/protobuf/java/src/test/java/com/google/protobuf/FieldPresenceTest.java
diff --git a/third_party/protobuf/java/src/test/java/com/google/protobuf/FieldPresenceTest.java b/third_party/protobuf/java/src/test/java/com/google/protobuf/FieldPresenceTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..eaeec0b8aecc13073d05f89d9f587b0f21edc336
--- /dev/null
+++ b/third_party/protobuf/java/src/test/java/com/google/protobuf/FieldPresenceTest.java
@@ -0,0 +1,373 @@
+// 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 com.google.protobuf.Descriptors.Descriptor;
+import com.google.protobuf.Descriptors.FieldDescriptor;
+import com.google.protobuf.FieldPresenceTestProto.TestAllTypes;
+import com.google.protobuf.FieldPresenceTestProto.TestOptionalFieldsOnly;
+import com.google.protobuf.FieldPresenceTestProto.TestRepeatedFieldsOnly;
+import protobuf_unittest.UnittestProto;
+
+import junit.framework.TestCase;
+
+/**
+ * Unit tests for protos that doesn't support field presence test for optional
+ * non-message fields.
+ */
+public class FieldPresenceTest extends TestCase {
+  private static boolean hasMethod(Class clazz, String name) {
+    try {
+      if (clazz.getMethod(name, new Class[]{}) != null) {
+        return true;
+      } else {
+        return false;
+      }
+    } catch (NoSuchMethodException e) {
+      return false;
+    }
+  }
+
+  private static boolean isHasMethodRemoved(
+      Class classWithFieldPresence,
+      Class classWithoutFieldPresence,
+      String camelName) {
+    return hasMethod(classWithFieldPresence, "get" + camelName)
+        && hasMethod(classWithFieldPresence, "has" + camelName)
+        && hasMethod(classWithoutFieldPresence, "get" + camelName)
+        && !hasMethod(classWithoutFieldPresence, "has" + camelName);
+  }
+
+  public void testHasMethod() {
+    // Optional non-message fields don't have a hasFoo() method generated.
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.class,
+        TestAllTypes.class,
+        "OptionalInt32"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.class,
+        TestAllTypes.class,
+        "OptionalString"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.class,
+        TestAllTypes.class,
+        "OptionalBytes"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.class,
+        TestAllTypes.class,
+        "OptionalNestedEnum"));
+
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.Builder.class,
+        TestAllTypes.Builder.class,
+        "OptionalInt32"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.Builder.class,
+        TestAllTypes.Builder.class,
+        "OptionalString"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.Builder.class,
+        TestAllTypes.Builder.class,
+        "OptionalBytes"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.Builder.class,
+        TestAllTypes.Builder.class,
+        "OptionalNestedEnum"));
+
+    // message fields still have the hasFoo() method generated.
+    assertFalse(TestAllTypes.newBuilder().build().hasOptionalNestedMessage());
+    assertFalse(TestAllTypes.newBuilder().hasOptionalNestedMessage());
+
+    // oneof fields don't have hasFoo() methods (even for message types).
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.class,
+        TestAllTypes.class,
+        "OneofUint32"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.class,
+        TestAllTypes.class,
+        "OneofString"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.class,
+        TestAllTypes.class,
+        "OneofBytes"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.class,
+        TestAllTypes.class,
+        "OneofNestedMessage"));
+
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.Builder.class,
+        TestAllTypes.Builder.class,
+        "OneofUint32"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.Builder.class,
+        TestAllTypes.Builder.class,
+        "OneofString"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.Builder.class,
+        TestAllTypes.Builder.class,
+        "OneofBytes"));
+    assertTrue(isHasMethodRemoved(
+        UnittestProto.TestAllTypes.Builder.class,
+        TestAllTypes.Builder.class,
+        "OneofNestedMessage"));
+  }
+
+  public void testOneofEquals() throws Exception {
+    TestAllTypes.Builder builder = TestAllTypes.newBuilder();
+    TestAllTypes message1 = builder.build();
+    // Set message2's oneof_uint32 field to defalut value. The two
+    // messages should be different when check with oneof case.
+    builder.setOneofUint32(0);
+    TestAllTypes message2 = builder.build();
+    assertFalse(message1.equals(message2));
+  }
+
+  public void testFieldPresence() {
+    // Optional non-message fields set to their default value are treated the
+    // same way as not set.
+
+    // Serialization will ignore such fields.
+    TestAllTypes.Builder builder = TestAllTypes.newBuilder();
+    builder.setOptionalInt32(0);
+    builder.setOptionalString("");
+    builder.setOptionalBytes(ByteString.EMPTY);
+    builder.setOptionalNestedEnum(TestAllTypes.NestedEnum.FOO);
+    TestAllTypes message = builder.build();
+    assertEquals(0, message.getSerializedSize());
+
+    // mergeFrom() will ignore such fields.
+    TestAllTypes.Builder a = TestAllTypes.newBuilder();
+    a.setOptionalInt32(1);
+    a.setOptionalString("x");
+    a.setOptionalBytes(ByteString.copyFromUtf8("y"));
+    a.setOptionalNestedEnum(TestAllTypes.NestedEnum.BAR);
+    TestAllTypes.Builder b = TestAllTypes.newBuilder();
+    b.setOptionalInt32(0);
+    b.setOptionalString("");
+    b.setOptionalBytes(ByteString.EMPTY);
+    b.setOptionalNestedEnum(TestAllTypes.NestedEnum.FOO);
+    a.mergeFrom(b.build());
+    message = a.build();
+    assertEquals(1, message.getOptionalInt32());
+    assertEquals("x", message.getOptionalString());
+    assertEquals(ByteString.copyFromUtf8("y"), message.getOptionalBytes());
+    assertEquals(TestAllTypes.NestedEnum.BAR, message.getOptionalNestedEnum());
+
+    // equals()/hashCode() should produce the same results.
+    TestAllTypes empty = TestAllTypes.newBuilder().build();
+    message = builder.build();
+    assertTrue(empty.equals(message));
+    assertTrue(message.equals(empty));
+    assertEquals(empty.hashCode(), message.hashCode());
+  }
+
+  public void testFieldPresenceByReflection() {
+    Descriptor descriptor = TestAllTypes.getDescriptor();
+    FieldDescriptor optionalInt32Field = descriptor.findFieldByName("optional_int32");
+    FieldDescriptor optionalStringField = descriptor.findFieldByName("optional_string");
+    FieldDescriptor optionalBytesField = descriptor.findFieldByName("optional_bytes");
+    FieldDescriptor optionalNestedEnumField = descriptor.findFieldByName("optional_nested_enum");
+
+    // Field not present.
+    TestAllTypes message = TestAllTypes.newBuilder().build();
+    assertFalse(message.hasField(optionalInt32Field));
+    assertFalse(message.hasField(optionalStringField));
+    assertFalse(message.hasField(optionalBytesField));
+    assertFalse(message.hasField(optionalNestedEnumField));
+    assertEquals(0, message.getAllFields().size());
+
+    // Field set to default value is seen as not present.
+    message = TestAllTypes.newBuilder()
+        .setOptionalInt32(0)
+        .setOptionalString("")
+        .setOptionalBytes(ByteString.EMPTY)
+        .setOptionalNestedEnum(TestAllTypes.NestedEnum.FOO)
+        .build();
+    assertFalse(message.hasField(optionalInt32Field));
+    assertFalse(message.hasField(optionalStringField));
+    assertFalse(message.hasField(optionalBytesField));
+    assertFalse(message.hasField(optionalNestedEnumField));
+    assertEquals(0, message.getAllFields().size());
+
+    // Field set to non-default value is seen as present.
+    message = TestAllTypes.newBuilder()
+        .setOptionalInt32(1)
+        .setOptionalString("x")
+        .setOptionalBytes(ByteString.copyFromUtf8("y"))
+        .setOptionalNestedEnum(TestAllTypes.NestedEnum.BAR)
+        .build();
+    assertTrue(message.hasField(optionalInt32Field));
+    assertTrue(message.hasField(optionalStringField));
+    assertTrue(message.hasField(optionalBytesField));
+    assertTrue(message.hasField(optionalNestedEnumField));
+    assertEquals(4, message.getAllFields().size());
+  }
+  
+  public void testMessageField() {
+    TestAllTypes.Builder builder = TestAllTypes.newBuilder();
+    assertFalse(builder.hasOptionalNestedMessage());
+    assertFalse(builder.build().hasOptionalNestedMessage());
+    
+    TestAllTypes.NestedMessage.Builder nestedBuilder =
+        builder.getOptionalNestedMessageBuilder();
+    assertTrue(builder.hasOptionalNestedMessage());
+    assertTrue(builder.build().hasOptionalNestedMessage());
+    
+    nestedBuilder.setValue(1);
+    assertEquals(1, builder.build().getOptionalNestedMessage().getValue());
+    
+    builder.clearOptionalNestedMessage();
+    assertFalse(builder.hasOptionalNestedMessage());
+    assertFalse(builder.build().hasOptionalNestedMessage());
+    
+    // Unlike non-message fields, if we set a message field to its default value (i.e.,
+    // default instance), the field should be seen as present.
+    builder.setOptionalNestedMessage(TestAllTypes.NestedMessage.getDefaultInstance());
+    assertTrue(builder.hasOptionalNestedMessage());
+    assertTrue(builder.build().hasOptionalNestedMessage());
+  }
+
+  public void testSerializeAndParse() throws Exception {
+    TestAllTypes.Builder builder = TestAllTypes.newBuilder();
+    builder.setOptionalInt32(1234);
+    builder.setOptionalString("hello");
+    builder.setOptionalNestedMessage(TestAllTypes.NestedMessage.getDefaultInstance());
+    // Set an oneof field to its default value and expect it to be serialized (i.e.,
+    // an oneof field set to the default value should be treated as present).
+    builder.setOneofInt32(0);
+    ByteString data = builder.build().toByteString();
+
+    TestAllTypes message = TestAllTypes.parseFrom(data);
+    assertEquals(1234, message.getOptionalInt32());
+    assertEquals("hello", message.getOptionalString());
+    // Fields not set will have the default value.
+    assertEquals(ByteString.EMPTY, message.getOptionalBytes());
+    assertEquals(TestAllTypes.NestedEnum.FOO, message.getOptionalNestedEnum());
+    // The message field is set despite that it's set with a default instance.
+    assertTrue(message.hasOptionalNestedMessage());
+    assertEquals(0, message.getOptionalNestedMessage().getValue());
+    // The oneof field set to its default value is also present.
+    assertEquals(
+        TestAllTypes.OneofFieldCase.ONEOF_INT32, message.getOneofFieldCase());
+  }
+
+  // Regression test for b/16173397
+  // Make sure we haven't screwed up the code generation for repeated fields.
+  public void testRepeatedFields() throws Exception {
+    TestAllTypes.Builder builder = TestAllTypes.newBuilder();
+    builder.setOptionalInt32(1234);
+    builder.setOptionalString("hello");
+    builder.setOptionalNestedMessage(TestAllTypes.NestedMessage.getDefaultInstance());
+    builder.addRepeatedInt32(4321);
+    builder.addRepeatedString("world");
+    builder.addRepeatedNestedMessage(TestAllTypes.NestedMessage.getDefaultInstance());
+    ByteString data = builder.build().toByteString();
+
+    TestOptionalFieldsOnly optionalOnlyMessage = TestOptionalFieldsOnly.parseFrom(data);
+    assertEquals(1234, optionalOnlyMessage.getOptionalInt32());
+    assertEquals("hello", optionalOnlyMessage.getOptionalString());
+    assertTrue(optionalOnlyMessage.hasOptionalNestedMessage());
+    assertEquals(0, optionalOnlyMessage.getOptionalNestedMessage().getValue());
+
+    TestRepeatedFieldsOnly repeatedOnlyMessage = TestRepeatedFieldsOnly.parseFrom(data);
+    assertEquals(1, repeatedOnlyMessage.getRepeatedInt32Count());
+    assertEquals(4321, repeatedOnlyMessage.getRepeatedInt32(0));
+    assertEquals(1, repeatedOnlyMessage.getRepeatedStringCount());
+    assertEquals("world", repeatedOnlyMessage.getRepeatedString(0));
+    assertEquals(1, repeatedOnlyMessage.getRepeatedNestedMessageCount());
+    assertEquals(0, repeatedOnlyMessage.getRepeatedNestedMessage(0).getValue());
+  }
+
+  public void testIsInitialized() throws Exception {
+    TestAllTypes.Builder builder = TestAllTypes.newBuilder();
+
+    // Test optional proto2 message fields.
+    UnittestProto.TestRequired.Builder proto2Builder =
+        builder.getOptionalProto2MessageBuilder();
+    assertFalse(builder.isInitialized());
+    assertFalse(builder.buildPartial().isInitialized());
+
+    proto2Builder.setA(1).setB(2).setC(3);
+    assertTrue(builder.isInitialized());
+    assertTrue(builder.buildPartial().isInitialized());
+
+    // Test oneof proto2 message fields.
+    proto2Builder = builder.getOneofProto2MessageBuilder();
+    assertFalse(builder.isInitialized());
+    assertFalse(builder.buildPartial().isInitialized());
+
+    proto2Builder.setA(1).setB(2).setC(3);
+    assertTrue(builder.isInitialized());
+    assertTrue(builder.buildPartial().isInitialized());
+
+    // Test repeated proto2 message fields.
+    proto2Builder = builder.addRepeatedProto2MessageBuilder();
+    assertFalse(builder.isInitialized());
+    assertFalse(builder.buildPartial().isInitialized());
+
+    proto2Builder.setA(1).setB(2).setC(3);
+    assertTrue(builder.isInitialized());
+    assertTrue(builder.buildPartial().isInitialized());
+  }
+
+  
+  // Test that unknown fields are dropped.
+  public void testUnknownFields() throws Exception {
+    TestAllTypes.Builder builder = TestAllTypes.newBuilder();
+    builder.setOptionalInt32(1234);
+    builder.addRepeatedInt32(5678);
+    TestAllTypes message = builder.build();
+    ByteString data = message.toByteString();
+    
+    TestOptionalFieldsOnly optionalOnlyMessage =
+        TestOptionalFieldsOnly.parseFrom(data);
+    // UnknownFieldSet should be empty.
+    assertEquals(
+        0, optionalOnlyMessage.getUnknownFields().toByteString().size());
+    assertEquals(1234, optionalOnlyMessage.getOptionalInt32());
+    message = TestAllTypes.parseFrom(optionalOnlyMessage.toByteString());
+    assertEquals(1234, message.getOptionalInt32());
+    // The repeated field is discarded because it's unknown to the optional-only
+    // message.
+    assertEquals(0, message.getRepeatedInt32Count());
+    
+    DynamicMessage dynamicOptionalOnlyMessage =
+        DynamicMessage.getDefaultInstance(
+            TestOptionalFieldsOnly.getDescriptor())
+        .getParserForType().parseFrom(data);
+    assertEquals(
+        0, dynamicOptionalOnlyMessage.getUnknownFields().toByteString().size());
+    assertEquals(optionalOnlyMessage.toByteString(),
+        dynamicOptionalOnlyMessage.toByteString());
+  }
+}