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/**
* Copyright 2020 ZTE Corporation.
*
* 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 org.onap.holmes.common.utils;
import com.google.gson.*;
import org.junit.Test;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import java.util.Map;
import static org.hamcrest.core.Is.is;
import static org.hamcrest.core.IsEqual.equalTo;
import static org.junit.Assert.assertThat;
public class GsonUtilTest {
private final TestBean bean1;
private final TestBean bean2;
private final Gson gson = buildGson();
private Date date;
public GsonUtilTest() {
date = new Date();
bean1 = new TestBean("onap1", 10, 10f, 10d, date);
bean2 = new TestBean("onap2", 20, 20f, 20d, date);
}
@Test
public void beanToJson() {
String expected = gson.toJson(bean1);
String actual = GsonUtil.beanToJson(bean1);
assertThat(actual, equalTo(expected));
}
@Test
public void jsonToBean() {
TestBean expected = bean1;
TestBean actual = GsonUtil.jsonToBean(gson.toJson(expected), TestBean.class);
assertThat(expected.getString(), equalTo(actual.getString()));
assertThat(expected.getInteger(), equalTo(actual.getInteger()));
assertThat(expected.getaDouble(), equalTo(actual.getaDouble()));
assertThat(expected.getaFloat(), equalTo(actual.getaFloat()));
assertThat(expected.getaDate(), equalTo(actual.getaDate()));
}
@Test
public void jsonToList() {
List<TestBean> expected = Arrays.asList( bean1, bean2);
List<TestBean> actual = GsonUtil.jsonToList(gson.toJson(expected), TestBean.class);
assertThat(expected.size(), equalTo(actual.size()));
for (TestBean tb : expected) {
assertThat(actual.contains(tb), is(true));
}
}
@Test
public void jsonToListMaps() {
long timestamp = date.getTime();
List<Map<String, TestBean>> actual = GsonUtil.jsonToListMaps(
String.format("[{\"onap1\":{\"string\":\"onap1\",\"integer\":10,\"aFloat\":10.0,\"aDouble\":10.0,\"aDate\": %d}},", timestamp)
+ String.format("{\"onap2\":{\"string\":\"onap2\",\"integer\":20,\"aFloat\":20.0,\"aDouble\":20.0,\"aDate\": \"%s\"}}]", timestamp), TestBean.class);
assertThat(actual.get(0).get("onap1"), equalTo(new TestBean("onap1", 10, 10f, 10d, date)));
assertThat(actual.get(1).get("onap2"), equalTo(new TestBean("onap2", 20, 20f, 20d, date)));
}
@Test
public void jsonToMap() {
Map<String, TestBean> actual = GsonUtil
.jsonToMap(String.format("{\"onap1\":{\"string\":\"onap1\",\"integer\":10,\"aFloat\":10.0,\"aDouble\":10.0,\"aDate\":%d}}",date.getTime()), TestBean.class);
assertThat(actual.get("onap1"), equalTo(new TestBean("onap1", 10, 10f, 10d, date)));
}
@Test
public void getAsString() {
assertThat("onap1",
equalTo(GsonUtil.getAsString(JsonParser.parseString(GsonUtil.beanToJson(bean1)).getAsJsonObject(),"string")));
}
@Test
public void getAsLong() {
assertThat(10L,
is(GsonUtil.getAsLong(JsonParser.parseString(GsonUtil.beanToJson(bean1)).getAsJsonObject(),"integer")));
}
@Test
public void getAsInt() {
assertThat(10,
is(GsonUtil.getAsInt(JsonParser.parseString(GsonUtil.beanToJson(bean1)).getAsJsonObject(),"integer")));
}
private Gson buildGson() {
return new GsonBuilder()
.registerTypeAdapter(Integer.class, (JsonDeserializer<Integer>) (json, typeOfT, context) -> {
try {
return json.getAsInt();
} catch (NumberFormatException e) {
return 0;
}
})
.registerTypeAdapter(Date.class, (JsonDeserializer<Date>) (jsonElement, type, jsonDeserializationContext) -> {
try {
return jsonElement == null ? null : new Date(jsonElement.getAsLong());
} catch (NumberFormatException e) {
return null;
}
})
.registerTypeAdapter(Date.class, (JsonSerializer<Date>) (date, type, jsonSerializationContext)
-> date == null ? null : new JsonPrimitive(date.getTime()))
.create();
}
}
class TestBean {
private String string;
private int integer;
private float aFloat;
private double aDouble;
private Date aDate;
public TestBean(String string, int integer, float aFloat, double aDouble, Date aDate) {
this.string = string;
this.integer = integer;
this.aFloat = aFloat;
this.aDouble = aDouble;
this.aDate = aDate;
}
public String getString() {
return string;
}
public int getInteger() {
return integer;
}
public float getaFloat() {
return aFloat;
}
public double getaDouble() {
return aDouble;
}
public Date getaDate(){ return aDate;}
@Override
public boolean equals(Object o) {
if (o == null || ! (o instanceof TestBean)) {
return false;
}
return string.equals(((TestBean) o).string)
&& integer == ((TestBean) o).integer
&& aDouble == ((TestBean) o).aDouble
&& aFloat == ((TestBean) o).aFloat
&& ((aDate == null && ((TestBean)o).aDate == null) || aDate.equals(((TestBean)o).aDate));
}
@Override
public int hashCode() {
return string.hashCode();
}
}
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