76 lines
2.8 KiB
Java
76 lines
2.8 KiB
Java
/*
|
|
* Copyright (C) 2012 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;
|
|
|
|
import com.google.gson.reflect.TypeToken;
|
|
import java.io.ByteArrayInputStream;
|
|
import java.io.ByteArrayOutputStream;
|
|
import java.io.IOException;
|
|
import java.io.ObjectInputStream;
|
|
import java.io.ObjectOutputStream;
|
|
import java.lang.reflect.Type;
|
|
import java.util.ArrayList;
|
|
import java.util.Arrays;
|
|
import java.util.List;
|
|
import java.util.Map;
|
|
import junit.framework.TestCase;
|
|
|
|
/**
|
|
* Check that Gson doesn't return non-serializable data types.
|
|
*
|
|
* @author Jesse Wilson
|
|
*/
|
|
public final class JavaSerializationTest extends TestCase {
|
|
private final Gson gson = new Gson();
|
|
|
|
public void testMapIsSerializable() throws Exception {
|
|
Type type = new TypeToken<Map<String, Integer>>() {}.getType();
|
|
Map<String, Integer> map = gson.fromJson("{\"b\":1,\"c\":2,\"a\":3}", type);
|
|
Map<String, Integer> serialized = serializedCopy(map);
|
|
assertEquals(map, serialized);
|
|
// Also check that the iteration order is retained.
|
|
assertEquals(Arrays.asList("b", "c", "a"), new ArrayList<>(serialized.keySet()));
|
|
}
|
|
|
|
public void testListIsSerializable() throws Exception {
|
|
Type type = new TypeToken<List<String>>() {}.getType();
|
|
List<String> list = gson.fromJson("[\"a\",\"b\",\"c\"]", type);
|
|
List<String> serialized = serializedCopy(list);
|
|
assertEquals(list, serialized);
|
|
}
|
|
|
|
public void testNumberIsSerializable() throws Exception {
|
|
Type type = new TypeToken<List<Number>>() {}.getType();
|
|
List<Number> list = gson.fromJson("[1,3.14,6.673e-11]", type);
|
|
List<Number> serialized = serializedCopy(list);
|
|
assertEquals(1.0, serialized.get(0).doubleValue());
|
|
assertEquals(3.14, serialized.get(1).doubleValue());
|
|
assertEquals(6.673e-11, serialized.get(2).doubleValue());
|
|
}
|
|
|
|
@SuppressWarnings("unchecked") // Serialization promises to return the same type.
|
|
private <T> T serializedCopy(T object) throws IOException, ClassNotFoundException {
|
|
ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
|
|
ObjectOutputStream out = new ObjectOutputStream(bytesOut);
|
|
out.writeObject(object);
|
|
out.close();
|
|
ByteArrayInputStream bytesIn = new ByteArrayInputStream(bytesOut.toByteArray());
|
|
ObjectInputStream in = new ObjectInputStream(bytesIn);
|
|
return (T) in.readObject();
|
|
}
|
|
}
|