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Testing Path Joining Operations in AndroidUtilCode

This test suite validates the path joining functionality in the AndroidUtilCode library’s PathUtils class. It ensures correct handling of file path concatenation with various input combinations and edge cases for Android filesystem operations.

Test Coverage Overview

The test suite provides comprehensive coverage of the PathUtils.join() method, focusing on path string concatenation scenarios.

Key areas tested include:

Empty string handling
Leading and trailing slash normalization
Path combination with single and multiple slashes
Base path with and without trailing slashes

Implementation Analysis

The testing approach utilizes JUnit’s assertion framework to verify path joining operations. The implementation follows a systematic pattern of testing various input combinations, ensuring proper path normalization and concatenation.

The test cases leverage JUnit’s @Test annotations and assertEquals assertions to validate expected outputs against actual results.

Technical Details

Testing Tools and Configuration:

JUnit 4 testing framework
BaseTest class extension for common test utilities
Assert methods for validation
Static imports for assertion methods

Best Practices Demonstrated

The test suite exemplifies several testing best practices including clear test method naming, comprehensive edge case coverage, and systematic test organization.

Notable practices include:

Isolated test cases for different scenarios
Consistent assertion patterns
Edge case handling for empty strings and slash variations
Clear test method naming convention

blankj/androidutilcode

lib/utilcode/src/test/java/com/blankj/utilcode/util/PathUtilsTest.java

            
package com.blankj.utilcode.util;

import org.junit.Test;

import static org.junit.Assert.assertEquals;

/**
 * <pre>
 *     author: blankj
 *     blog  : http://blankj.com
 *     time  : 2020/04/09
 *     desc  :
 * </pre>
 */
public class PathUtilsTest extends BaseTest {

    @Test
    public void join() {
        assertEquals(PathUtils.join("", ""), "");
        assertEquals(PathUtils.join("", "data"), "/data");

        assertEquals(PathUtils.join("", "//data"), "/data");
        assertEquals(PathUtils.join("", "data//"), "/data");
        assertEquals(PathUtils.join("", "//data//"), "/data");

        assertEquals(PathUtils.join("/sdcard", "data"), "/sdcard/data");
        assertEquals(PathUtils.join("/sdcard/", "data"), "/sdcard/data");
    }
}