org.springframework.cloud.stream.metrics.config.MetricJsonSerializerTests.java Source code

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Here is the source code for org.springframework.cloud.stream.metrics.config.MetricJsonSerializerTests.java

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/*
 * Copyright 2017 the original author or authors.
 *
 * 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.springframework.cloud.stream.metrics.config;

import java.io.StringWriter;
import java.util.Date;

import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import org.json.JSONObject;
import org.junit.Test;

import org.springframework.boot.actuate.metrics.Metric;
import org.springframework.cloud.stream.metrics.config.MetricJsonSerializer.Serializer;

import static org.junit.Assert.assertEquals;

/**
 * @author Oleg Zhurakousky
 */
public class MetricJsonSerializerTests {

    @Test
    public void validateAlwaysGMTDateAndFormat() throws Exception {
        Date date = new Date(1493060197188L); // Mon Apr 24 14:56:37 EDT 2017
        Metric<Number> metric = new Metric<Number>("Hello", 123, date);

        JsonFactory factory = new JsonFactory();
        StringWriter writer = new StringWriter();
        JsonGenerator jsonGenerator = factory.createGenerator(writer);
        Serializer ser = new Serializer();
        ser.serialize(metric, jsonGenerator, null);
        jsonGenerator.flush();

        JSONObject json = new JSONObject(writer.toString());
        String serializedTimestamp = json.getString("timestamp");
        assertEquals("2017-04-24T18:56:37.188Z", serializedTimestamp);
    }
}