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Testing Problem Report XML Transformation in dianping/cat

This test suite validates XML parsing and serialization functionality for problem reports in the Cat monitoring system. It ensures accurate transformation between XML and object representations while maintaining data integrity.

Test Coverage Overview

The test suite focuses on bidirectional XML conversion of ProblemReport entities.

Key areas covered include:

XML parsing from source files
Object to XML serialization
Data integrity verification
Character encoding handling (UTF-8)
Whitespace normalization

Implementation Analysis

The testing approach employs JUnit 4 framework with a focus on XML transformation validation. The implementation uses SAX parsing for efficient XML processing and custom XML building for output generation. The test verifies that parsed objects can be serialized back to equivalent XML format.

Technical patterns include:

Resource file loading
SAX parsing implementation
XML building and comparison
Carriage return normalization

Technical Details

Testing tools and components:

JUnit 4 test framework
DefaultSaxParser for XML parsing
DefaultXmlBuilder for XML serialization
Unidal Helper Files utility
UTF-8 encoding support
Assert methods for validation

Best Practices Demonstrated

The test implementation showcases several testing best practices for XML processing validation.

Notable practices include:

Resource-based test data management
Explicit character encoding specification
Platform-independent line ending handling
Clean separation of parsing and building concerns
Comprehensive input/output equivalence checking

dianping/cat

cat-consumer/src/test/java/com/dianping/cat/consumer/problem/ProblemReportTest.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.problem;

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.consumer.problem.model.transform.DefaultXmlBuilder;

public class ProblemReportTest {
	@Test
	public void testXml() throws Exception {
		String source = Files.forIO().readFrom(getClass().getResourceAsStream("problem-report.xml"), "utf-8");
		ProblemReport root = DefaultSaxParser.parse(source);
		String xml = new DefaultXmlBuilder().buildXml(root);
		String expected = source;

		Assert.assertEquals(expected.replace("\r", ""), xml.replace("\r", ""));
	}
}