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/*
* 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.JsonArray;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.JsonParser;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSyntaxException;
import com.google.gson.common.TestTypes.BagOfPrimitives;
import com.google.gson.common.TestTypes.Nested;
import com.google.gson.reflect.TypeToken;
import junit.framework.TestCase;
import java.io.StringReader;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
/**
* Functional tests for that use JsonParser and related Gson methods
*
* @author Inderjeet Singh
* @author Joel Leitch
*/
public class JsonParserTest extends TestCase {
private Gson gson;
@Override
protected void setUp() throws Exception {
super.setUp();
gson = new Gson();
}
public void testParseInvalidJson() {
try {
gson.fromJson("[[]", Object[].class);
fail();
} catch (JsonSyntaxException expected) { }
}
public void testDeserializingCustomTree() {
JsonObject obj = new JsonObject();
obj.addProperty("stringValue", "foo");
obj.addProperty("intValue", 11);
BagOfPrimitives target = gson.fromJson(obj, BagOfPrimitives.class);
assertEquals(11, target.intValue);
assertEquals("foo", target.stringValue);
}
public void testBadTypeForDeserializingCustomTree() {
JsonObject obj = new JsonObject();
obj.addProperty("stringValue", "foo");
obj.addProperty("intValue", 11);
JsonArray array = new JsonArray();
array.add(obj);
try {
gson.fromJson(array, BagOfPrimitives.class);
fail("BagOfPrimitives is not an array");
} catch (JsonParseException expected) { }
}
public void testBadFieldTypeForCustomDeserializerCustomTree() {
JsonArray array = new JsonArray();
array.add(new JsonPrimitive("blah"));
JsonObject obj = new JsonObject();
obj.addProperty("stringValue", "foo");
obj.addProperty("intValue", 11);
obj.add("longValue", array);
try {
gson.fromJson(obj, BagOfPrimitives.class);
fail("BagOfPrimitives is not an array");
} catch (JsonParseException expected) { }
}
public void testBadFieldTypeForDeserializingCustomTree() {
JsonArray array = new JsonArray();
array.add(new JsonPrimitive("blah"));
JsonObject primitive1 = new JsonObject();
primitive1.addProperty("string", "foo");
primitive1.addProperty("intValue", 11);
JsonObject obj = new JsonObject();
obj.add("primitive1", primitive1);
obj.add("primitive2", array);
try {
gson.fromJson(obj, Nested.class);
fail("Nested has field BagOfPrimitives which is not an array");
} catch (JsonParseException expected) { }
}
public void testChangingCustomTreeAndDeserializing() {
StringReader json =
new StringReader("{'stringValue':'no message','intValue':10,'longValue':20}");
JsonObject obj = (JsonObject) JsonParser.parseReader(json);
obj.remove("stringValue");
obj.addProperty("stringValue", "fooBar");
BagOfPrimitives target = gson.fromJson(obj, BagOfPrimitives.class);
assertEquals(10, target.intValue);
assertEquals(20, target.longValue);
assertEquals("fooBar", target.stringValue);
}
public void testExtraCommasInArrays() {
Type type = new TypeToken<List<String>>() {}.getType();
assertEquals(Arrays.asList("a", null, "b", null, null), gson.fromJson("[a,,b,,]", type));
assertEquals(Arrays.asList(null, null), gson.fromJson("[,]", type));
assertEquals(Arrays.asList("a", null), gson.fromJson("[a,]", type));
}
public void testExtraCommasInMaps() {
Type type = new TypeToken<Map<String, String>>() {}.getType();
try {
gson.fromJson("{a:b,}", type);
fail();
} catch (JsonSyntaxException expected) {
}
}
}
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