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Testing Problem Trend Graph Generation in CAT Monitoring System

This test suite validates the ProblemTrendGraphBuilder functionality in the CAT monitoring system, focusing on graph data generation from problem reports. It ensures accurate trend visualization and data transformation for monitoring purposes.

Test Coverage Overview

The test coverage focuses on validating the problem report trend graph generation functionality.

Tests XML parsing and data transformation
Validates graph data point calculations
Verifies specific IP and URL handling
Ensures correct array data generation

Implementation Analysis

The testing approach utilizes JUnit framework with a focus on data transformation verification.

Implements XML file-based test data input
Uses ProblemReportVisitor pattern for data processing
Employs array comparison for result validation
Implements precise numeric validation

Technical Details

JUnit 4 testing framework
DefaultSaxParser for XML processing
Files.forIO utility for resource handling
Assert methods for validation
UTF-8 encoding for file reading

Best Practices Demonstrated

The test demonstrates robust validation practices for data processing components.

Resource-based test data management
Precise numeric comparison
Clear test case organization
Proper exception handling
Effective visitor pattern implementation

dianping/cat

cat-home/src/test/java/com/dianping/cat/report/page/problem/ProblemTrendGraphBuilderTest.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
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package com.dianping.cat.report.page.problem;

import java.util.Arrays;

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

import com.dianping.cat.consumer.problem.model.entity.ProblemReport;
import com.dianping.cat.consumer.problem.model.transform.DefaultSaxParser;
import com.dianping.cat.report.page.problem.transform.ProblemTrendGraphBuilder;
import com.dianping.cat.report.page.problem.transform.ProblemTrendGraphBuilder.ProblemReportVisitor;

public class ProblemTrendGraphBuilderTest {

	@Test
	public void test() throws Exception {
		String xml = Files.forIO().readFrom(getClass().getResourceAsStream("ProblemReportDailyGraph.xml"), "utf-8");
		ProblemReport report = DefaultSaxParser.parse(xml);

		ProblemReportVisitor visitor = new ProblemTrendGraphBuilder().new ProblemReportVisitor("10.1.1.166", "long-url",
								"/location.bin");
		visitor.visitProblemReport(report);

		double[] datas = visitor.getDatas();
		double[] expectErrors = new double[datas.length];

		for (int i = 0; i < datas.length; i++) {
			expectErrors[i] = 45;
		}
		Assert.assertEquals(true, Arrays.equals(datas, expectErrors));
	}
}