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Testing Transaction Report Graph Generation in CAT

This test suite validates the functionality of transaction report graph creation in the CAT monitoring system, focusing on both hourly and daily graph generation and merging capabilities.

Test Coverage Overview

The test suite provides comprehensive coverage of transaction report graph creation functionality:

Tests hourly graph merging with base transaction reports
Validates daily graph creation and merging across multiple days
Verifies data consistency and accuracy in merged reports
Tests date-based aggregation and formatting

Implementation Analysis

The testing approach employs JUnit framework with XML-based test data:

The implementation uses SAX parsing for XML processing and custom graph creators for both hourly and daily reports. The tests validate the graph creation logic by comparing expected and actual XML outputs using TestHelper utilities.

Utilizes SAX parsing for efficient XML handling
Implements separate creators for hourly and daily graphs
Uses custom comparison logic for validation

Technical Details

Key technical components include:

JUnit 4 testing framework
DefaultSaxParser for XML processing
Custom TestHelper for result comparison
SimpleDateFormat for date handling
Files.forIO() utility for resource loading
UTF-8 encoding for file operations

Best Practices Demonstrated

The test suite exemplifies several testing best practices:

Separation of test data into external XML files
Clear test method naming conventions
Proper exception handling
Structured test data organization
Effective use of assertion messages
Modular test case design

dianping/cat

cat-home/src/test/java/com/dianping/cat/report/task/transaction/TransactionReportGraphCreatorTest.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
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 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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 * See the License for the specific language governing permissions and
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package com.dianping.cat.report.task.transaction;

import java.text.SimpleDateFormat;

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

import com.dianping.cat.TestHelper;
import com.dianping.cat.consumer.transaction.model.entity.TransactionReport;
import com.dianping.cat.consumer.transaction.model.transform.DefaultSaxParser;
import com.dianping.cat.report.page.transaction.task.TransactionReportDailyGraphCreator;
import com.dianping.cat.report.page.transaction.task.TransactionReportHourlyGraphCreator;

public class TransactionReportGraphCreatorTest {

	@Test
	public void testMergeHourlyGraph() throws Exception {
		String oldXml = Files.forIO().readFrom(getClass().getResourceAsStream("BaseTransactionReportForGraph.xml"),	"utf-8");
		TransactionReport report1 = DefaultSaxParser.parse(oldXml);
		TransactionReport report2 = DefaultSaxParser.parse(oldXml);
		String expected = Files.forIO()
								.readFrom(getClass().getResourceAsStream("TransactionReportHourlyGraphResult.xml"), "utf-8");

		TransactionReport result = new TransactionReport(report1.getDomain());

		TransactionReportHourlyGraphCreator creator = new TransactionReportHourlyGraphCreator(result, 10);

		creator.createGraph(report1);
		creator.createGraph(report2);

		Assert.assertTrue("Check the merge result!",TestHelper.isEquals(DefaultSaxParser.parse(expected),result));
		
	}

	@Test
	public void testMergeDailyGraph() throws Exception {
		String oldXml1 = Files.forIO().readFrom(getClass().getResourceAsStream("BaseDailyTransactionReport1.xml"),	"utf-8");
		String oldXml2 = Files.forIO().readFrom(getClass().getResourceAsStream("BaseDailyTransactionReport2.xml"),	"utf-8");

		TransactionReport report1 = DefaultSaxParser.parse(oldXml1);
		TransactionReport report2 = DefaultSaxParser.parse(oldXml2);
		String expected = Files.forIO()
								.readFrom(getClass().getResourceAsStream("TransactionReportDailyGraphResult.xml"), "utf-8");

		TransactionReport result = new TransactionReport(report1.getDomain());

		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		TransactionReportDailyGraphCreator creator = new TransactionReportDailyGraphCreator(result, 7,
								sdf.parse("2016-01-23 00:00:00"));

		creator.createGraph(report1);
		creator.createGraph(report2);
		Assert.assertTrue("Check the merge result!",TestHelper.isEquals(DefaultSaxParser.parse(expected),result));
		

	}
}