Back to Repositories

Testing Event Report Merger Implementation in Cat Monitoring System

This test suite validates the Event Report merging functionality in the Cat monitoring system, focusing on XML report parsing and merging capabilities. The tests ensure accurate combination of event data while maintaining source report integrity.

Test Coverage Overview

The test suite provides comprehensive coverage of the EventReportMerger functionality.

Key areas tested include:

XML parsing of old and new event reports
Merging of multiple event reports while preserving original data
Validation of merge results against expected output
Source report integrity verification

Implementation Analysis

The testing approach utilizes JUnit framework with XML-based test data validation.

Implementation features:

SAX parsing for XML processing
Visitor pattern implementation for report traversal
Resource-based test data loading
Custom equality comparison through TestHelper

Technical Details

Testing infrastructure includes:

JUnit 4 test framework
Custom SAX parser implementation
File I/O utilities for test data handling
UTF-8 encoding for XML processing
Custom TestHelper class for result validation

Best Practices Demonstrated

The test implementation showcases several testing best practices.

Notable aspects include:

Separation of test data from test logic
Verification of source data integrity
Clear test method naming
Resource-based test data management
Comprehensive assertion checks

dianping/cat

cat-consumer/src/test/java/com/dianping/cat/consumer/event/EventReportMergerTest.java

            
/*
 * Copyright (c) 2011-2018, Meituan Dianping. All Rights Reserved.
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 com.dianping.cat.consumer.event;

import org.junit.Assert;
import org.junit.Test;
import org.unidal.helper.Files;

import com.dianping.cat.consumer.TestHelper;
import com.dianping.cat.consumer.event.model.entity.EventReport;
import com.dianping.cat.consumer.event.model.transform.DefaultSaxParser;

public class EventReportMergerTest {
	@Test
	public void testEventReportMerge() throws Exception {
		String oldXml = Files.forIO().readFrom(getClass().getResourceAsStream("event_report_old.xml"), "utf-8");
		String newXml = Files.forIO().readFrom(getClass().getResourceAsStream("event_report_new.xml"), "utf-8");
		EventReport reportOld = DefaultSaxParser.parse(oldXml);
		EventReport reportNew = DefaultSaxParser.parse(newXml);
		String expected = Files.forIO().readFrom(getClass().getResourceAsStream("event_report_mergeResult.xml"), "utf-8");
		EventReportMerger merger = new EventReportMerger(new EventReport(reportOld.getDomain()));

		reportOld.accept(merger);
		reportNew.accept(merger);

		Assert.assertTrue("Check the merge result!", TestHelper.isEquals(DefaultSaxParser.parse(expected),merger.getEventReport()));
		Assert.assertTrue("Source report is changed!", TestHelper.isEquals(DefaultSaxParser.parse(newXml),reportNew));
		Assert.assertTrue("Source report is changed!",  TestHelper.isEquals(DefaultSaxParser.parse(oldXml),reportOld));
	}
}