Java example source code file (PrintFormattingTest.java)

This example Java source code file (PrintFormattingTest.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

arraylist, bagofprimitives, classwithtransientfields, exception, gson, jsonobject, nested, override, primitivearray, printformattingtest, string, suppresswarnings, testcase, util

The PrintFormattingTest.java Java example source code

/*
 * Copyright (C) 2008 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.functional;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonObject;
import com.google.gson.common.TestTypes.BagOfPrimitives;
import com.google.gson.common.TestTypes.ClassWithTransientFields;
import com.google.gson.common.TestTypes.Nested;
import com.google.gson.common.TestTypes.PrimitiveArray;

import junit.framework.TestCase;

import java.util.ArrayList;
import java.util.List;

/**
 * Functional tests for print formatting.
 *
 * @author Inderjeet Singh
 * @author Joel Leitch
 */
public class PrintFormattingTest extends TestCase {

  private Gson gson;

  @Override
  protected void setUp() throws Exception {
    super.setUp();
    gson = new Gson();
  }

  @SuppressWarnings({"unchecked", "rawtypes"})
  public void testCompactFormattingLeavesNoWhiteSpace() {
    List list = new ArrayList();
    list.add(new BagOfPrimitives());
    list.add(new Nested());
    list.add(new PrimitiveArray());
    list.add(new ClassWithTransientFields());

    String json = gson.toJson(list);
    assertContainsNoWhiteSpace(json);
  }

  public void testJsonObjectWithNullValues() {
    JsonObject obj = new JsonObject();
    obj.addProperty("field1", "value1");
    obj.addProperty("field2", (String) null);
    String json = gson.toJson(obj);
    assertTrue(json.contains("field1"));
    assertFalse(json.contains("field2"));
  }

  public void testJsonObjectWithNullValuesSerialized() {
    gson = new GsonBuilder().serializeNulls().create();
    JsonObject obj = new JsonObject();
    obj.addProperty("field1", "value1");
    obj.addProperty("field2", (String) null);
    String json = gson.toJson(obj);
    assertTrue(json.contains("field1"));
    assertTrue(json.contains("field2"));
  }

  private static void assertContainsNoWhiteSpace(String str) {
    for (char c : str.toCharArray()) {
      assertFalse(Character.isWhitespace(c));
    }
  }
}