gson-comments/gson/src/test/java/com/google/gson/functional/MapTest.java

654 lines
23 KiB
Java

/*
* 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 java.lang.reflect.Type;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentNavigableMap;
import java.util.concurrent.ConcurrentSkipListMap;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.InstanceCreator;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonParser;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import com.google.gson.JsonSyntaxException;
import com.google.gson.common.TestTypes;
import com.google.gson.internal.$Gson$Types;
import com.google.gson.reflect.TypeToken;
import junit.framework.TestCase;
/**
* Functional test for Json serialization and deserialization for Maps
*
* @author Inderjeet Singh
* @author Joel Leitch
*/
public class MapTest extends TestCase {
private Gson gson;
@Override
protected void setUp() throws Exception {
super.setUp();
gson = new Gson();
}
public void testMapSerialization() {
Map<String, Integer> map = new LinkedHashMap<>();
map.put("a", 1);
map.put("b", 2);
Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
String json = gson.toJson(map, typeOfMap);
assertTrue(json.contains("\"a\":1"));
assertTrue(json.contains("\"b\":2"));
}
public void testMapDeserialization() {
String json = "{\"a\":1,\"b\":2}";
Type typeOfMap = new TypeToken<Map<String,Integer>>(){}.getType();
Map<String, Integer> target = gson.fromJson(json, typeOfMap);
assertEquals(1, target.get("a").intValue());
assertEquals(2, target.get("b").intValue());
}
@SuppressWarnings({"unchecked", "rawtypes"})
public void testRawMapSerialization() {
Map map = new LinkedHashMap();
map.put("a", 1);
map.put("b", "string");
String json = gson.toJson(map);
assertTrue(json.contains("\"a\":1"));
assertTrue(json.contains("\"b\":\"string\""));
}
public void testMapSerializationEmpty() {
Map<String, Integer> map = new LinkedHashMap<>();
Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
String json = gson.toJson(map, typeOfMap);
assertEquals("{}", json);
}
public void testMapDeserializationEmpty() {
Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
Map<String, Integer> map = gson.fromJson("{}", typeOfMap);
assertTrue(map.isEmpty());
}
public void testMapSerializationWithNullValue() {
Map<String, Integer> map = new LinkedHashMap<>();
map.put("abc", null);
Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
String json = gson.toJson(map, typeOfMap);
// Maps are represented as JSON objects, so ignoring null field
assertEquals("{}", json);
}
public void testMapDeserializationWithNullValue() {
Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
Map<String, Integer> map = gson.fromJson("{\"abc\":null}", typeOfMap);
assertEquals(1, map.size());
assertNull(map.get("abc"));
}
public void testMapSerializationWithNullValueButSerializeNulls() {
gson = new GsonBuilder().serializeNulls().create();
Map<String, Integer> map = new LinkedHashMap<>();
map.put("abc", null);
Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
String json = gson.toJson(map, typeOfMap);
assertEquals("{\"abc\":null}", json);
}
public void testMapSerializationWithNullKey() {
Map<String, Integer> map = new LinkedHashMap<>();
map.put(null, 123);
Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
String json = gson.toJson(map, typeOfMap);
assertEquals("{\"null\":123}", json);
}
public void testMapDeserializationWithNullKey() {
Type typeOfMap = new TypeToken<Map<String, Integer>>() {}.getType();
Map<String, Integer> map = gson.fromJson("{\"null\":123}", typeOfMap);
assertEquals(1, map.size());
assertEquals(123, map.get("null").intValue());
assertNull(map.get(null));
map = gson.fromJson("{null:123}", typeOfMap);
assertEquals(1, map.size());
assertEquals(123, map.get("null").intValue());
assertNull(map.get(null));
}
public void testMapSerializationWithIntegerKeys() {
Map<Integer, String> map = new LinkedHashMap<>();
map.put(123, "456");
Type typeOfMap = new TypeToken<Map<Integer, String>>() {}.getType();
String json = gson.toJson(map, typeOfMap);
assertEquals("{\"123\":\"456\"}", json);
}
public void testMapDeserializationWithIntegerKeys() {
Type typeOfMap = new TypeToken<Map<Integer, String>>() {}.getType();
Map<Integer, String> map = gson.fromJson("{\"123\":\"456\"}", typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(123));
assertEquals("456", map.get(123));
}
public void testMapDeserializationWithUnquotedIntegerKeys() {
Type typeOfMap = new TypeToken<Map<Integer, String>>() {}.getType();
Map<Integer, String> map = gson.fromJson("{123:\"456\"}", typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(123));
assertEquals("456", map.get(123));
}
public void testMapDeserializationWithLongKeys() {
long longValue = 9876543210L;
String json = String.format("{\"%d\":\"456\"}", longValue);
Type typeOfMap = new TypeToken<Map<Long, String>>() {}.getType();
Map<Long, String> map = gson.fromJson(json, typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(longValue));
assertEquals("456", map.get(longValue));
}
public void testMapDeserializationWithUnquotedLongKeys() {
long longKey = 9876543210L;
String json = String.format("{%d:\"456\"}", longKey);
Type typeOfMap = new TypeToken<Map<Long, String>>() {}.getType();
Map<Long, String> map = gson.fromJson(json, typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(longKey));
assertEquals("456", map.get(longKey));
}
public void testHashMapDeserialization() throws Exception {
Type typeOfMap = new TypeToken<HashMap<Integer, String>>() {}.getType();
HashMap<Integer, String> map = gson.fromJson("{\"123\":\"456\"}", typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(123));
assertEquals("456", map.get(123));
}
public void testSortedMap() throws Exception {
Type typeOfMap = new TypeToken<SortedMap<Integer, String>>() {}.getType();
SortedMap<Integer, String> map = gson.fromJson("{\"123\":\"456\"}", typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(123));
assertEquals("456", map.get(123));
}
public void testConcurrentMap() throws Exception {
Type typeOfMap = new TypeToken<ConcurrentMap<Integer, String>>() {}.getType();
ConcurrentMap<Integer, String> map = gson.fromJson("{\"123\":\"456\"}", typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(123));
assertEquals("456", map.get(123));
String json = gson.toJson(map);
assertEquals("{\"123\":\"456\"}", json);
}
public void testConcurrentHashMap() throws Exception {
Type typeOfMap = new TypeToken<ConcurrentHashMap<Integer, String>>() {}.getType();
ConcurrentHashMap<Integer, String> map = gson.fromJson("{\"123\":\"456\"}", typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(123));
assertEquals("456", map.get(123));
String json = gson.toJson(map);
assertEquals("{\"123\":\"456\"}", json);
}
public void testConcurrentNavigableMap() throws Exception {
Type typeOfMap = new TypeToken<ConcurrentNavigableMap<Integer, String>>() {}.getType();
ConcurrentNavigableMap<Integer, String> map = gson.fromJson("{\"123\":\"456\"}", typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(123));
assertEquals("456", map.get(123));
String json = gson.toJson(map);
assertEquals("{\"123\":\"456\"}", json);
}
public void testConcurrentSkipListMap() throws Exception {
Type typeOfMap = new TypeToken<ConcurrentSkipListMap<Integer, String>>() {}.getType();
ConcurrentSkipListMap<Integer, String> map = gson.fromJson("{\"123\":\"456\"}", typeOfMap);
assertEquals(1, map.size());
assertTrue(map.containsKey(123));
assertEquals("456", map.get(123));
String json = gson.toJson(map);
assertEquals("{\"123\":\"456\"}", json);
}
public void testParameterizedMapSubclassSerialization() {
MyParameterizedMap<String, String> map = new MyParameterizedMap<>(10);
map.put("a", "b");
Type type = new TypeToken<MyParameterizedMap<String, String>>() {}.getType();
String json = gson.toJson(map, type);
assertTrue(json.contains("\"a\":\"b\""));
}
@SuppressWarnings({ "unused", "serial" })
private static class MyParameterizedMap<K, V> extends LinkedHashMap<K, V> {
final int foo;
MyParameterizedMap(int foo) {
this.foo = foo;
}
}
public void testMapSubclassSerialization() {
MyMap map = new MyMap();
map.put("a", "b");
String json = gson.toJson(map, MyMap.class);
assertTrue(json.contains("\"a\":\"b\""));
}
public void testMapStandardSubclassDeserialization() {
String json = "{a:'1',b:'2'}";
Type type = new TypeToken<LinkedHashMap<String, String>>() {}.getType();
LinkedHashMap<String, Integer> map = gson.fromJson(json, type);
assertEquals("1", map.get("a"));
assertEquals("2", map.get("b"));
}
public void testMapSubclassDeserialization() {
Gson gson = new GsonBuilder().registerTypeAdapter(MyMap.class, new InstanceCreator<MyMap>() {
@Override public MyMap createInstance(Type type) {
return new MyMap();
}
}).create();
String json = "{\"a\":1,\"b\":2}";
MyMap map = gson.fromJson(json, MyMap.class);
assertEquals("1", map.get("a"));
assertEquals("2", map.get("b"));
}
public void testCustomSerializerForSpecificMapType() {
Type type = $Gson$Types.newParameterizedTypeWithOwner(
null, Map.class, String.class, Long.class);
Gson gson = new GsonBuilder()
.registerTypeAdapter(type, new JsonSerializer<Map<String, Long>>() {
@Override public JsonElement serialize(Map<String, Long> src, Type typeOfSrc,
JsonSerializationContext context) {
JsonArray array = new JsonArray();
for (long value : src.values()) {
array.add(new JsonPrimitive(value));
}
return array;
}
}).create();
Map<String, Long> src = new LinkedHashMap<>();
src.put("one", 1L);
src.put("two", 2L);
src.put("three", 3L);
assertEquals("[1,2,3]", gson.toJson(src, type));
}
/**
* Created in response to http://code.google.com/p/google-gson/issues/detail?id=99
*/
private static class ClassWithAMap {
Map<String, String> map = new TreeMap<>();
}
/**
* Created in response to http://code.google.com/p/google-gson/issues/detail?id=99
*/
public void testMapSerializationWithNullValues() {
ClassWithAMap target = new ClassWithAMap();
target.map.put("name1", null);
target.map.put("name2", "value2");
String json = gson.toJson(target);
assertFalse(json.contains("name1"));
assertTrue(json.contains("name2"));
}
/**
* Created in response to http://code.google.com/p/google-gson/issues/detail?id=99
*/
public void testMapSerializationWithNullValuesSerialized() {
Gson gson = new GsonBuilder().serializeNulls().create();
ClassWithAMap target = new ClassWithAMap();
target.map.put("name1", null);
target.map.put("name2", "value2");
String json = gson.toJson(target);
assertTrue(json.contains("name1"));
assertTrue(json.contains("name2"));
}
public void testMapSerializationWithWildcardValues() {
Map<String, ? extends Collection<? extends Integer>> map = new LinkedHashMap<>();
map.put("test", null);
Type typeOfMap =
new TypeToken<Map<String, ? extends Collection<? extends Integer>>>() {}.getType();
String json = gson.toJson(map, typeOfMap);
assertEquals("{}", json);
}
public void testMapDeserializationWithWildcardValues() {
Type typeOfMap = new TypeToken<Map<String, ? extends Long>>() {}.getType();
Map<String, ? extends Long> map = gson.fromJson("{\"test\":123}", typeOfMap);
assertEquals(1, map.size());
assertEquals(Long.valueOf(123L), map.get("test"));
}
private static class MyMap extends LinkedHashMap<String, String> {
private static final long serialVersionUID = 1L;
@SuppressWarnings("unused")
int foo = 10;
}
/**
* From bug report http://code.google.com/p/google-gson/issues/detail?id=95
*/
public void testMapOfMapSerialization() {
Map<String, Map<String, String>> map = new HashMap<>();
Map<String, String> nestedMap = new HashMap<>();
nestedMap.put("1", "1");
nestedMap.put("2", "2");
map.put("nestedMap", nestedMap);
String json = gson.toJson(map);
assertTrue(json.contains("nestedMap"));
assertTrue(json.contains("\"1\":\"1\""));
assertTrue(json.contains("\"2\":\"2\""));
}
/**
* From bug report http://code.google.com/p/google-gson/issues/detail?id=95
*/
public void testMapOfMapDeserialization() {
String json = "{nestedMap:{'2':'2','1':'1'}}";
Type type = new TypeToken<Map<String, Map<String, String>>>(){}.getType();
Map<String, Map<String, String>> map = gson.fromJson(json, type);
Map<String, String> nested = map.get("nestedMap");
assertEquals("1", nested.get("1"));
assertEquals("2", nested.get("2"));
}
/**
* From bug report http://code.google.com/p/google-gson/issues/detail?id=178
*/
public void testMapWithQuotes() {
Map<String, String> map = new HashMap<>();
map.put("a\"b", "c\"d");
String json = gson.toJson(map);
assertEquals("{\"a\\\"b\":\"c\\\"d\"}", json);
}
/**
* From issue 227.
*/
public void testWriteMapsWithEmptyStringKey() {
Map<String, Boolean> map = new HashMap<>();
map.put("", true);
assertEquals("{\"\":true}", gson.toJson(map));
}
public void testReadMapsWithEmptyStringKey() {
Map<String, Boolean> map = gson.fromJson("{\"\":true}", new TypeToken<Map<String, Boolean>>() {}.getType());
assertEquals(Boolean.TRUE, map.get(""));
}
/**
* From bug report http://code.google.com/p/google-gson/issues/detail?id=204
*/
public void testSerializeMaps() {
Map<String, Object> map = new LinkedHashMap<>();
map.put("a", 12);
map.put("b", null);
LinkedHashMap<String, Object> innerMap = new LinkedHashMap<>();
innerMap.put("test", 1);
innerMap.put("TestStringArray", new String[] { "one", "two" });
map.put("c", innerMap);
assertEquals("{\"a\":12,\"b\":null,\"c\":{\"test\":1,\"TestStringArray\":[\"one\",\"two\"]}}",
new GsonBuilder().serializeNulls().create().toJson(map));
assertEquals("{\n \"a\": 12,\n \"b\": null,\n \"c\": "
+ "{\n \"test\": 1,\n \"TestStringArray\": "
+ "[\n \"one\",\n \"two\"\n ]\n }\n}",
new GsonBuilder().setPrettyPrinting().serializeNulls().create().toJson(map));
assertEquals("{\"a\":12,\"c\":{\"test\":1,\"TestStringArray\":[\"one\",\"two\"]}}",
new GsonBuilder().create().toJson(map));
assertEquals("{\n \"a\": 12,\n \"c\": "
+ "{\n \"test\": 1,\n \"TestStringArray\": "
+ "[\n \"one\",\n \"two\"\n ]\n }\n}",
new GsonBuilder().setPrettyPrinting().create().toJson(map));
innerMap.put("d", "e");
assertEquals("{\"a\":12,\"c\":{\"test\":1,\"TestStringArray\":[\"one\",\"two\"],\"d\":\"e\"}}",
new Gson().toJson(map));
}
public final void testInterfaceTypeMap() {
MapClass element = new MapClass();
TestTypes.Sub subType = new TestTypes.Sub();
element.addBase("Test", subType);
element.addSub("Test", subType);
String subTypeJson = new Gson().toJson(subType);
String expected = "{\"bases\":{\"Test\":" + subTypeJson + "},"
+ "\"subs\":{\"Test\":" + subTypeJson + "}}";
Gson gsonWithComplexKeys = new GsonBuilder()
.enableComplexMapKeySerialization()
.create();
String json = gsonWithComplexKeys.toJson(element);
assertEquals(expected, json);
Gson gson = new Gson();
json = gson.toJson(element);
assertEquals(expected, json);
}
public final void testInterfaceTypeMapWithSerializer() {
MapClass element = new MapClass();
TestTypes.Sub subType = new TestTypes.Sub();
element.addBase("Test", subType);
element.addSub("Test", subType);
Gson tempGson = new Gson();
String subTypeJson = tempGson.toJson(subType);
final JsonElement baseTypeJsonElement = tempGson.toJsonTree(subType, TestTypes.Base.class);
String baseTypeJson = tempGson.toJson(baseTypeJsonElement);
String expected = "{\"bases\":{\"Test\":" + baseTypeJson + "},"
+ "\"subs\":{\"Test\":" + subTypeJson + "}}";
JsonSerializer<TestTypes.Base> baseTypeAdapter = new JsonSerializer<TestTypes.Base>() {
@Override public JsonElement serialize(TestTypes.Base src, Type typeOfSrc,
JsonSerializationContext context) {
return baseTypeJsonElement;
}
};
Gson gson = new GsonBuilder()
.enableComplexMapKeySerialization()
.registerTypeAdapter(TestTypes.Base.class, baseTypeAdapter)
.create();
String json = gson.toJson(element);
assertEquals(expected, json);
gson = new GsonBuilder()
.registerTypeAdapter(TestTypes.Base.class, baseTypeAdapter)
.create();
json = gson.toJson(element);
assertEquals(expected, json);
}
public void testGeneralMapField() throws Exception {
MapWithGeneralMapParameters map = new MapWithGeneralMapParameters();
map.map.put("string", "testString");
map.map.put("stringArray", new String[]{"one", "two"});
map.map.put("objectArray", new Object[]{1, 2L, "three"});
String expected = "{\"map\":{\"string\":\"testString\",\"stringArray\":"
+ "[\"one\",\"two\"],\"objectArray\":[1,2,\"three\"]}}";
assertEquals(expected, gson.toJson(map));
gson = new GsonBuilder()
.enableComplexMapKeySerialization()
.create();
assertEquals(expected, gson.toJson(map));
}
public void testComplexKeysSerialization() {
Map<Point, String> map = new LinkedHashMap<>();
map.put(new Point(2, 3), "a");
map.put(new Point(5, 7), "b");
String json = "{\"2,3\":\"a\",\"5,7\":\"b\"}";
assertEquals(json, gson.toJson(map, new TypeToken<Map<Point, String>>() {}.getType()));
assertEquals(json, gson.toJson(map, Map.class));
}
public void testComplexKeysDeserialization() {
String json = "{'2,3':'a','5,7':'b'}";
try {
gson.fromJson(json, new TypeToken<Map<Point, String>>() {}.getType());
fail();
} catch (JsonParseException expected) {
}
}
public void testStringKeyDeserialization() {
String json = "{'2,3':'a','5,7':'b'}";
Map<String, String> map = new LinkedHashMap<>();
map.put("2,3", "a");
map.put("5,7", "b");
assertEquals(map, gson.fromJson(json, new TypeToken<Map<String, String>>() {}.getType()));
}
public void testNumberKeyDeserialization() {
String json = "{'2.3':'a','5.7':'b'}";
Map<Double, String> map = new LinkedHashMap<>();
map.put(2.3, "a");
map.put(5.7, "b");
assertEquals(map, gson.fromJson(json, new TypeToken<Map<Double, String>>() {}.getType()));
}
public void testBooleanKeyDeserialization() {
String json = "{'true':'a','false':'b'}";
Map<Boolean, String> map = new LinkedHashMap<>();
map.put(true, "a");
map.put(false, "b");
assertEquals(map, gson.fromJson(json, new TypeToken<Map<Boolean, String>>() {}.getType()));
}
public void testMapDeserializationWithDuplicateKeys() {
try {
gson.fromJson("{'a':1,'a':2}", new TypeToken<Map<String, Integer>>() {}.getType());
fail();
} catch (JsonSyntaxException expected) {
}
}
public void testSerializeMapOfMaps() {
Type type = new TypeToken<Map<String, Map<String, String>>>() {}.getType();
Map<String, Map<String, String>> map = newMap(
"a", newMap("ka1", "va1", "ka2", "va2"),
"b", newMap("kb1", "vb1", "kb2", "vb2"));
assertEquals("{'a':{'ka1':'va1','ka2':'va2'},'b':{'kb1':'vb1','kb2':'vb2'}}",
gson.toJson(map, type).replace('"', '\''));
}
public void testDeerializeMapOfMaps() {
Type type = new TypeToken<Map<String, Map<String, String>>>() {}.getType();
Map<String, Map<String, String>> map = newMap(
"a", newMap("ka1", "va1", "ka2", "va2"),
"b", newMap("kb1", "vb1", "kb2", "vb2"));
String json = "{'a':{'ka1':'va1','ka2':'va2'},'b':{'kb1':'vb1','kb2':'vb2'}}";
assertEquals(map, gson.fromJson(json, type));
}
private <K, V> Map<K, V> newMap(K key1, V value1, K key2, V value2) {
Map<K, V> result = new LinkedHashMap<>();
result.put(key1, value1);
result.put(key2, value2);
return result;
}
public void testMapNamePromotionWithJsonElementReader() {
String json = "{'2.3':'a'}";
Map<Double, String> map = new LinkedHashMap<>();
map.put(2.3, "a");
JsonElement tree = JsonParser.parseString(json);
assertEquals(map, gson.fromJson(tree, new TypeToken<Map<Double, String>>() {}.getType()));
}
static class Point {
private final int x;
private final int y;
Point(int x, int y) {
this.x = x;
this.y = y;
}
@Override public boolean equals(Object o) {
return o instanceof Point && x == ((Point) o).x && y == ((Point) o).y;
}
@Override public int hashCode() {
return x * 37 + y;
}
@Override public String toString() {
return x + "," + y;
}
}
static final class MapClass {
private final Map<String, TestTypes.Base> bases = new HashMap<>();
private final Map<String, TestTypes.Sub> subs = new HashMap<>();
public final void addBase(String name, TestTypes.Base value) {
bases.put(name, value);
}
public final void addSub(String name, TestTypes.Sub value) {
subs.put(name, value);
}
}
static final class MapWithGeneralMapParameters {
@SuppressWarnings({"rawtypes", "unchecked"})
final Map<String, Object> map = new LinkedHashMap();
}
}