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Testing PackageInternalsFinder Path Resolution in Alibaba Arthas

This test suite validates the PackageInternalsFinder functionality in Alibaba Arthas, focusing on handling special characters and whitespace in file paths. The suite tests the finder’s robustness when dealing with non-standard path formats and internationalized character sets.

Test Coverage Overview

The test coverage focuses on edge cases in file path handling within the PackageInternalsFinder component.

Tests file paths containing whitespace characters
Validates handling of Chinese characters in paths
Verifies empty result handling for invalid paths
Ensures consistent behavior across different character encodings

Implementation Analysis

The testing approach employs JUnit to verify the PackageInternalsFinder’s path resolution capabilities. The implementation uses direct class loader manipulation and JavaFileObject handling to test path resolution.

Utilizes ClassLoader injection for testing
Implements isolated test cases for each path scenario
Employs Assert.assertEquals for verification

Technical Details

JUnit 4 testing framework
javax.tools.JavaFileObject for file handling
Custom ClassLoader configuration
IOException handling for file operations
Path manipulation utilities

Best Practices Demonstrated

The test suite exemplifies robust testing practices for file system operations and internationalization support.

Isolated test methods for specific scenarios
Proper exception handling and verification
Clear test method naming conventions
Effective use of JUnit assertions
Comprehensive edge case coverage

alibaba/arthas

memorycompiler/src/test/java/com/taobao/arthas/compiler/PackageInternalsFinderTest.java

            
package com.taobao.arthas.compiler;

import org.junit.Assert;
import org.junit.Test;

import javax.tools.JavaFileObject;
import java.io.IOException;
import java.util.List;

/**
 * description: PackageInternalsFinderTest <br>
 * date: 2021/9/23 12:55 下午 <br>
 * author: zzq0324 <br>
 * version: 1.0 <br>
 */
public class PackageInternalsFinderTest {

    @Test
    public void testFilePathContainWhitespace() throws IOException {
        PackageInternalsFinder finder = new PackageInternalsFinder(this.getClass().getClassLoader());
        List<JavaFileObject> fileObjectList= finder.find("file/test folder");

        Assert.assertEquals(fileObjectList.size(), 0);
    }

    @Test
    public void testFilePathContainChineseCharacter() throws IOException {
        PackageInternalsFinder finder = new PackageInternalsFinder(this.getClass().getClassLoader());
        List<JavaFileObject> fileObjectList= finder.find("file/测试目录");

        Assert.assertEquals(fileObjectList.size(), 0);
    }
}