LazilyParsedNumberTest.java

/*
 * Copyright (C) 2015 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.internal;

import static com.google.common.truth.Truth.assertThat;
import static java.util.stream.Collectors.toList;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.math.BigDecimal;
import java.util.List;
import java.util.stream.Stream;
import org.junit.Test;

public class LazilyParsedNumberTest {
  @Test
  public void testHashCode() {
    LazilyParsedNumber n1 = new LazilyParsedNumber("1");
    LazilyParsedNumber n1Another = new LazilyParsedNumber("1");
    assertThat(n1Another.hashCode()).isEqualTo(n1.hashCode());
  }

  @Test
  public void testEquals() {
    LazilyParsedNumber n1 = new LazilyParsedNumber("1");
    LazilyParsedNumber n1Another = new LazilyParsedNumber("1");
    assertThat(n1.equals(n1Another)).isTrue();
  }

  @Test
  public void testCompareTo() {
    List<LazilyParsedNumber> inputs =
        Stream.of("1", "1.0", "2", "1e6").map(LazilyParsedNumber::new).sorted().collect(toList());
    List<LazilyParsedNumber> expected =
        Stream.of("1", "1.0", "1e6", "2").map(LazilyParsedNumber::new).collect(toList());
    assertThat(inputs).isEqualTo(expected);
  }

  @Test
  public void testJavaSerialization() throws IOException, ClassNotFoundException {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    ObjectOutputStream objOut = new ObjectOutputStream(out);
    objOut.writeObject(new LazilyParsedNumber("123"));
    objOut.close();

    ObjectInputStream objIn = new ObjectInputStream(new ByteArrayInputStream(out.toByteArray()));
    Number deserialized = (Number) objIn.readObject();
    assertThat(deserialized).isEqualTo(new BigDecimal("123"));
  }
}