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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.gson;
import static org.assertj.core.api.Assertions.assertThatCode;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonNull;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.apache.commons.jexl3.JexlException;
import org.junit.Before;
import org.junit.Test;
public class GsonTestUtilsTest {
private static final String HELLO = "hello";
private GsonTestUtils utils;
@Before
public void setUp() {
utils = new GsonTestUtils();
}
@Test
public void testGetGson() {
assertNotNull(utils.getGson());
}
@Test
public void testGsonRoundTrip() {
Data data = new Data();
data.setId(500);
// try with null text
data.setText(null);
assertEquals(data.toString(), utils.gsonRoundTrip(data, Data.class).toString());
// try with non-null text
data.setText(HELLO);
assertEquals(data.toString(), utils.gsonRoundTrip(data, Data.class).toString());
}
@Test
public void testCompareGsonObjectClass_testCompareGsonObjectFile() {
Data data = new Data();
data.setId(500);
data.setText(HELLO);
utils.compareGson(data, GsonTestUtilsTest.class);
// file not found
assertThatThrownBy(() -> utils.compareGson(data,
new File(GsonTestUtilsTest.class.getSimpleName() + "-NotFound.json")))
.isInstanceOf(JsonParseException.class)
.hasCauseInstanceOf(FileNotFoundException.class);
// force I/O error while reading file
GsonTestUtils utils2 = new GsonTestUtils() {
@Override
protected String readFile(File file) throws IOException {
throw new IOException("expected exception");
}
};
assertThatThrownBy(() -> utils2.compareGson(data, GsonTestUtilsTest.class))
.isInstanceOf(JsonParseException.class).hasCauseInstanceOf(IOException.class)
.hasMessage("error reading: GsonTestUtilsTest.json");
}
@Test
public void testCompareGsonObjectString() {
Data data = new Data();
data.setId(600);
data.setText(HELLO);
assertThatCode(() -> utils.compareGson(data, "{'id': ${obj.id}, 'text': '${obj.text}'}".replace('\'', '"')))
.doesNotThrowAnyException();
}
@Test
public void testCompareGsonObjectJsonElement() {
Data data = new Data();
data.setId(650);
data.setText(HELLO);
JsonObject json = new JsonObject();
json.addProperty("id", data.getId());
json.addProperty("text", data.getText());
utils.compareGson(data, json);
// mismatch
data.setText("world");
assertThatThrownBy(() -> utils.compareGson(data, json)).isInstanceOf(AssertionError.class);
}
@Test
public void testApplyScripts() {
Data data = new Data();
data.setId(700);
data.setText(HELLO);
String result = utils.applyScripts("no interpolation", data);
assertEquals("no interpolation", result);
result = utils.applyScripts("${obj.id} at start, ${obj.text} in middle, and end ${obj.id}", data);
assertEquals("700 at start, hello in middle, and end 700", result);
// try null value
data.setText(null);
result = utils.applyScripts("use ${obj.text} this", data);
assertEquals("use null this", result);
assertThatThrownBy(() -> utils.applyScripts("use ${obj.text} this", null))
.isInstanceOf(JsonParseException.class)
.hasCauseInstanceOf(JexlException.class)
.hasMessage("cannot expand element: ${obj.text}");
}
@Test
public void testReorderJsonObject() {
// insert properties in a non-alphabetical order
JsonObject inner = new JsonObject();
inner.addProperty("objBint", 100);
inner.add("objBNull", JsonNull.INSTANCE);
inner.addProperty("objB", true);
JsonArray arr = new JsonArray();
arr.add(110);
arr.add(inner);
arr.add(false);
JsonObject outer = new JsonObject();
outer.add("objANull", JsonNull.INSTANCE);
outer.addProperty("objA", true);
outer.addProperty("objAStr", "obj-a-string");
outer.add("nested-array", arr);
outer = utils.reorder(outer);
assertEquals("{'nested-array':[110,{'objB':true,'objBint':100},false],'objA':true,'objAStr':'obj-a-string'}"
.replace('\'', '"'), outer.toString());
}
@Test
public void testReorderJsonArray() {
// insert properties in a non-alphabetical order
JsonObject inner = new JsonObject();
inner.add("objCNull", JsonNull.INSTANCE);
inner.addProperty("objCStr", "obj-c-string");
inner.addProperty("objC", true);
JsonArray arr = new JsonArray();
arr.add(200);
arr.add(inner);
arr.add(false);
arr = utils.reorder(arr);
assertEquals("[200,{'objC':true,'objCStr':'obj-c-string'},false]".replace('\'', '"'), arr.toString());
}
@Test
public void testReorderJsonElement() {
// null element
JsonElement jsonEl = null;
assertNull(utils.reorder(jsonEl));
// object element
JsonObject obj = new JsonObject();
obj.add("objDNull", JsonNull.INSTANCE);
obj.addProperty("objDStr", "obj-d-string");
obj.addProperty("objD", true);
jsonEl = obj;
jsonEl = utils.reorder(jsonEl);
assertEquals("{'objD':true,'objDStr':'obj-d-string'}".replace('\'', '"'), jsonEl.toString());
// boolean
jsonEl = obj.get("objD");
jsonEl = utils.reorder(jsonEl);
assertEquals("true", jsonEl.toString());
// JsonNull
jsonEl = JsonNull.INSTANCE;
jsonEl = utils.reorder(jsonEl);
assertEquals("null", jsonEl.toString());
// array element
JsonObject inner = new JsonObject();
inner.add("objENull", JsonNull.INSTANCE);
inner.addProperty("objEStr", "obj-e-string");
inner.addProperty("objE", true);
JsonArray arr = new JsonArray();
arr.add(300);
arr.add(inner);
arr.add(false);
jsonEl = arr;
jsonEl = utils.reorder(jsonEl);
assertEquals("[300,{'objE':true,'objEStr':'obj-e-string'},false]".replace('\'', '"'), jsonEl.toString());
}
public static class Data {
private int id;
private String text;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
@Override
public String toString() {
return "Data [id=" + id + ", text=" + text + "]";
}
}
}
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