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Testing File Utility Operations Implementation in eladmin

This test suite validates core file utility functions in the eladmin project, covering file operations, extensions, and size calculations. The tests ensure reliable file handling and formatting across different scenarios.

Test Coverage Overview

The test suite provides comprehensive coverage of FileUtil class functionality, including file conversion, extension handling, and size formatting.

Key areas tested include:

MultipartFile to File conversion
File extension extraction
Filename processing without extensions
File size formatting across different units (B, KB, MB, GB)

Edge cases are addressed through various input scenarios and boundary conditions for size calculations.

Implementation Analysis

The testing approach utilizes JUnit Jupiter framework with focused unit tests for each file utility method. MockMultipartFile is employed to simulate file uploads, while assertion-based verification ensures accurate results.

The implementation follows a clear pattern of arrange-act-assert, with each test method targeting a specific file operation functionality.

Technical Details

Testing tools and configuration:

JUnit Jupiter test framework
Spring MockMultipartFile for file simulation
Static imports for cleaner test code
Direct assertion methods for result verification

Best Practices Demonstrated

The test suite exemplifies several testing best practices including isolated test methods, clear naming conventions, and comprehensive assertion coverage. Each test focuses on a single responsibility with meaningful test cases that validate both standard and edge scenarios.

Notable practices include:

Descriptive test method names
Isolated test scenarios
Consistent assertion patterns
Comprehensive size unit testing

elunez/eladmin

eladmin-common/src/test/java/me/zhengjie/utils/FileUtilTest.java

            
package me.zhengjie.utils;

import org.junit.jupiter.api.Test;
import org.springframework.mock.web.MockMultipartFile;

import static me.zhengjie.utils.FileUtil.*;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class FileUtilTest {

    @Test
    public void testToFile() {
        long retval = toFile(new MockMultipartFile("foo", (byte[]) null)).getTotalSpace();
        assertEquals(500695072768L, retval);
    }

    @Test
    public void testGetExtensionName() {
        assertEquals("foo", getExtensionName("foo"));
        assertEquals("exe", getExtensionName("bar.exe"));
    }

    @Test
    public void testGetFileNameNoEx() {
        assertEquals("foo", getFileNameNoEx("foo"));
        assertEquals("bar", getFileNameNoEx("bar.txt"));
    }

    @Test
    public void testGetSize() {
        assertEquals("1000B   ", getSize(1000));
        assertEquals("1.00KB   ", getSize(1024));
        assertEquals("1.00MB   ", getSize(1048576));
        assertEquals("1.00GB   ", getSize(1073741824));
    }
}