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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019-2020 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.internal;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.JsonNull;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import java.util.List;
import org.junit.Test;
import org.onap.policy.common.gson.JacksonExclusionStrategy;
import org.onap.policy.common.gson.internal.DataAdapterFactory.Data;
public class FieldDeserializerTest {
private static final String TEXT_FIELD_NAME = "text";
private static final String LIST_FIELD_NAME = "listField";
private static final String INITIAL_VALUE = "initial value";
private static final String NEW_VALUE = "new value";
private static DataAdapterFactory dataAdapter = new DataAdapterFactory();
private static Gson gson = new GsonBuilder().registerTypeAdapterFactory(dataAdapter)
.setExclusionStrategies(new JacksonExclusionStrategy()).create();
private FieldDeserializer deser;
private String text;
private List<Data> listField;
@Test
public void testGetFromTree() throws Exception {
deser = new FieldDeserializer(gson, FieldDeserializerTest.class.getDeclaredField(TEXT_FIELD_NAME));
JsonObject json = new JsonObject();
// no value in tree - text remains unchanged
text = INITIAL_VALUE;
deser.getFromTree(json, this);
assertEquals(INITIAL_VALUE, text);
// null value in tree - text remains unchanged
json.add(TEXT_FIELD_NAME, JsonNull.INSTANCE);
deser.getFromTree(json, this);
assertEquals(INITIAL_VALUE, text);
// now assign a value - text should be changed now
json.addProperty(TEXT_FIELD_NAME, NEW_VALUE);
deser.getFromTree(json, this);
assertEquals(NEW_VALUE, text);
/*
* check list field
*/
deser = new FieldDeserializer(gson, FieldDeserializerTest.class.getDeclaredField(LIST_FIELD_NAME));
json.add(LIST_FIELD_NAME, DataAdapterFactory.makeArray());
dataAdapter.reset();
listField = null;
deser.getFromTree(json, this);
assertTrue(dataAdapter.isDataRead());
assertEquals(DataAdapterFactory.makeList().toString(), listField.toString());
}
@Test
public void testGetFromTree_SetEx() throws Exception {
deser = new FieldDeserializer(gson, FieldDeserializerTest.class.getDeclaredField(TEXT_FIELD_NAME)) {
@Override
public Object fromJsonTree(JsonElement tree) {
// return an int, which won't fit in a String - cause an exception
return 10;
}
};
JsonObject json = new JsonObject();
json.addProperty(TEXT_FIELD_NAME, NEW_VALUE);
assertThatThrownBy(() -> deser.getFromTree(json, this)).isInstanceOf(JsonParseException.class)
.hasMessage(FieldDeserializer.SET_ERR + FieldDeserializerTest.class.getName() + ".text");
}
}
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