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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.common.gson;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.Assert.assertEquals;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonParseException;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.ToString;
import org.junit.Test;
public class StringTypeAdapterTest {
private static Gson gson = new GsonBuilder().registerTypeAdapter(MyData.class, new MyAdapter()).create();
private static final int TEST_NUM1 = 10;
private static final int TEST_NUM3 = 30;
@Test
public void test() {
InterestingFields data = new InterestingFields();
data.data1 = new MyData(TEST_NUM1);
data.data2 = null;
data.data3 = new MyData(TEST_NUM3);
String json = gson.toJson(data);
// instant should be encoded as a number, without quotes
assertThat(json).contains("10", "30");
InterestingFields data2 = gson.fromJson(json, InterestingFields.class);
assertEquals(data.toString(), data2.toString());
// try when the string is invalid
String json2 = json.replace("30", "invalid-value");
assertThatThrownBy(() -> gson.fromJson(json2, InterestingFields.class)).isInstanceOf(JsonParseException.class)
.hasMessageContaining("invalid data");
// null output
data = new InterestingFields();
json = gson.toJson(data);
data2 = gson.fromJson(json, InterestingFields.class);
assertEquals(data.toString(), data2.toString());
// null input
data2 = gson.fromJson("{\"data1\":null, \"data1\":null, \"data1\":null}", InterestingFields.class);
assertEquals(data.toString(), data2.toString());
// empty input
data2 = gson.fromJson("{}", InterestingFields.class);
assertEquals(data.toString(), data2.toString());
}
@Getter
@ToString
@AllArgsConstructor
private static class MyData {
private int num;
}
@ToString
private static class InterestingFields {
private MyData data1;
private MyData data2;
private MyData data3;
}
private static class MyAdapter extends StringTypeAdapter<MyData> {
public MyAdapter() {
super("data", string -> new MyData(Integer.parseInt(string)), data -> String.valueOf(data.num));
}
}
}
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