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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.utils.coder;
import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import org.junit.Before;
import org.junit.Test;
public class StandardCoderObjectTest {
private static final Gson gson = new Gson();
private static final String PROP1 = "abc";
private static final String PROP2 = "ghi";
private static final Integer PROP2_INDEX = 1;
private static final String PROP2b = "jkl";
private static final String VAL1 = "def";
private static final String VAL2 = "mno";
private static final String JSON = "{'abc':'def','ghi':[{},{'jkl':'mno'}]}".replace('\'', '"');
private StandardCoderObject sco;
/**
* Creates a standard object, populated with some data.
*
* @throws Exception if an error occurs
*/
@Before
public void setUp() throws Exception {
sco = new StandardCoderObject(gson.fromJson(JSON, JsonElement.class));
}
@Test
public void testStandardCoderObject() {
assertNull(new StandardCoderObject().getData());
}
@Test
public void testStandardCoderObjectJsonElement() {
assertNotNull(sco.getData());
assertEquals(JSON, gson.toJson(sco.getData()));
}
@Test
public void testGetString() throws Exception {
// one field
assertEquals(VAL1, sco.getString(PROP1));
// multiple fields
assertEquals(VAL2, sco.getString(PROP2, PROP2_INDEX, PROP2b));
// not found
assertNull(sco.getString("xyz"));
// read from null object
assertNull(new StandardCoderObject().getString());
assertNull(new StandardCoderObject().getString(PROP1));
JsonElement obj = gson.fromJson("{'abc':[]}".replace('\'', '"'), JsonElement.class);
sco = new StandardCoderObject(obj);
// not a primitive
assertNull(sco.getString(PROP1));
// not a JSON object
assertNull(sco.getString(PROP1, PROP2));
// invalid subscript
assertThatIllegalArgumentException().isThrownBy(() -> sco.getString(10.0));
}
@Test
public void testGetFieldFromObject() {
// not an object
assertNull(sco.getFieldFromObject(fromJson("[]"), PROP1));
// field doesn't exist
assertNull(sco.getFieldFromObject(fromJson("{}"), "non-existent"));
// field exists
assertEquals(4, sco.getFieldFromObject(fromJson("{\"world\":4}"), "world").getAsInt());
}
@Test
public void testGetItemFromArray() {
// not an array
assertNull(sco.getItemFromArray(fromJson("{}"), 0));
// negative index
assertThatIllegalArgumentException().isThrownBy(() -> sco.getItemFromArray(fromJson("[]"), -1));
// index out of bounds
assertNull(sco.getItemFromArray(fromJson("[5]"), 1));
assertNull(sco.getItemFromArray(fromJson("[5]"), 2));
// index exists
assertEquals(6, sco.getItemFromArray(fromJson("[5,6,7]"), 1).getAsInt());
// edge case: first and last item
assertEquals(50, sco.getItemFromArray(fromJson("[50,60,70]"), 0).getAsInt());
assertEquals(700, sco.getItemFromArray(fromJson("[500,600,700]"), 2).getAsInt());
}
private JsonElement fromJson(String json) {
return gson.fromJson(json, JsonElement.class);
}
}
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