Java example source code file (ProtosWithPrimitiveTypesTest.java)

This example Java source code file (ProtosWithPrimitiveTypesTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

descriptor, exception, gson, override, protoswithprimitivetypestest, simpleproto, string, testcase

The ProtosWithPrimitiveTypesTest.java Java example source code

/*
 * Copyright (C) 2010 Google Inc.
 *
 * 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.gson.protobuf.functional;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.protobuf.ProtoTypeAdapter;
import com.google.gson.protobuf.ProtoTypeAdapter.EnumSerialization;
import com.google.gson.protobuf.generated.Bag.SimpleProto;
import com.google.protobuf.Descriptors.Descriptor;
import com.google.protobuf.GeneratedMessage;

import junit.framework.TestCase;

public class ProtosWithPrimitiveTypesTest extends TestCase {
  private Gson gson;

  @Override
  protected void setUp() throws Exception {
    super.setUp();
    gson = new GsonBuilder().registerTypeHierarchyAdapter(
      GeneratedMessage.class, ProtoTypeAdapter.newBuilder()
          .setEnumSerialization(EnumSerialization.NUMBER)
          .build())
      .create();
  }

  public void testSerializeEmptyProto() {
    SimpleProto proto = SimpleProto.newBuilder().build();
    String json = gson.toJson(proto);
    assertEquals("{}", json);
  }

  public void testDeserializeEmptyProto() {
    SimpleProto proto = gson.fromJson("{}", SimpleProto.class);
    assertFalse(proto.hasCount());
    assertFalse(proto.hasMsg());
  }

  public void testSerializeProto() {
    Descriptor descriptor = SimpleProto.getDescriptor();
    SimpleProto proto = SimpleProto.newBuilder()
      .setCount(3)
      .setMsg("foo")
      .build();
    String json = gson.toJson(proto);
    assertTrue(json.contains("\"msg\":\"foo\""));
    assertTrue(json.contains("\"count\":3"));
  }

  public void testDeserializeProto() {
    SimpleProto proto = gson.fromJson("{msg:'foo',count:3}", SimpleProto.class);
    assertEquals("foo", proto.getMsg());
    assertEquals(3, proto.getCount());
  }

  public void testDeserializeWithExplicitNullValue() {
    SimpleProto proto = gson.fromJson("{msg:'foo',count:null}", SimpleProto.class);
    assertEquals("foo", proto.getMsg());
    assertEquals(0, proto.getCount());
  }

}