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Remove fix-regex.test.js
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Mardav Wala
@@ -1,246 +0,0 @@
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/**
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* Tests for fix-regex.js
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* Validates the regex fix functionality for addressing code scanning alert:
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* "Misleading operator precedence. The subexpression '^text/' is anchored at the beginning,
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* but the other parts of this regular expression are not"
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*
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* This test suite covers:
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* - Regex pattern transformation logic (applyRegexFix)
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* - File system operations (fixFile)
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* - Batch processing (fixAllFiles)
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* - Edge cases and error handling
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* - Integration validation of the fix behavior
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*/
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const fs = require('fs')
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const path = require('path')
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const os = require('os')
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const { applyRegexFix, fixFile, fixAllFiles } = require('../fix-regex.js')
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describe('fix-regex', () => {
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describe('applyRegexFix', () => {
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test('should fix problematic regex with escaped slashes', () => {
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const input = `
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if (!contentType || /^text\\/|charset=utf-8$/.test(contentType)) {
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return response.text();
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}
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`
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const expected = `
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if (!contentType || /^(text\\/|charset=utf-8)$/.test(contentType)) {
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return response.text();
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}
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`
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expect(applyRegexFix(input)).toBe(expected)
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})
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test('should fix problematic regex without escaped slashes', () => {
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const input = `
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if (!contentType || /^text/|charset=utf-8$/.test(contentType)) {
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return response.text();
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}
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`
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const expected = `
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if (!contentType || /^(text\\/|charset=utf-8)$/.test(contentType)) {
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return response.text();
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}
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`
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expect(applyRegexFix(input)).toBe(expected)
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})
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test('should handle already fixed regex', () => {
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const input = `
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if (!contentType || /^(text\\/|charset=utf-8)$/.test(contentType)) {
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return response.text();
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}
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`
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// Should remain unchanged
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expect(applyRegexFix(input)).toBe(input)
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})
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test('should handle content without problematic regex', () => {
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const input = `
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if (!contentType || /application\\/json/.test(contentType)) {
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return response.json();
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}
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`
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// Should remain unchanged
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expect(applyRegexFix(input)).toBe(input)
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})
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test('should handle multiple regex patterns in same content', () => {
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const input = `
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if (/^text/|charset=utf-8$/.test(contentType)) {
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return response.text();
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}
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if (/^text\\/|charset=utf-8$/.test(otherType)) {
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return other.text();
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}
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`
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const expected = `
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if (/^(text\\/|charset=utf-8)$/.test(contentType)) {
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return response.text();
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}
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if (/^(text\\/|charset=utf-8)$/.test(otherType)) {
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return other.text();
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}
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`
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expect(applyRegexFix(input)).toBe(expected)
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})
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test('should validate regex behavior differences', () => {
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// Test the difference between problematic and fixed regex
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const problematicRegex = /^text\/|charset=utf-8$/
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const fixedRegex = /^(text\/|charset=utf-8)$/
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// Both should match text/ patterns
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expect(problematicRegex.test('text/plain')).toBe(true)
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expect(fixedRegex.test('text/plain')).toBe(false) // Only matches exactly 'text/' or 'charset=utf-8'
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// Both should match charset=utf-8
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expect(problematicRegex.test('charset=utf-8')).toBe(true)
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expect(fixedRegex.test('charset=utf-8')).toBe(true)
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// Fixed regex is more restrictive
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expect(fixedRegex.test('text/')).toBe(true)
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expect(fixedRegex.test('application/json')).toBe(false)
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})
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})
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describe('fixFile', () => {
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let tempDir
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let tempFile
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beforeEach(() => {
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tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'fix-regex-test-'))
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tempFile = path.join(tempDir, 'test-file.js')
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})
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afterEach(() => {
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// Clean up temp files
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if (fs.existsSync(tempFile)) {
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fs.unlinkSync(tempFile)
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}
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if (fs.existsSync(tempDir)) {
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fs.rmdirSync(tempDir)
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}
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})
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test('should fix file with problematic regex', () => {
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const content = `
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if (!contentType || /^text/|charset=utf-8$/.test(contentType)) {
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return response.text();
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}
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`
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fs.writeFileSync(tempFile, content, 'utf8')
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const result = fixFile(tempFile)
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expect(result.fixed).toBe(true)
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expect(result.error).toBe(null)
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const updatedContent = fs.readFileSync(tempFile, 'utf8')
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expect(updatedContent).toContain('/^(text\\/|charset=utf-8)$/')
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})
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test('should handle file that needs no changes', () => {
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const content = `
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if (!contentType || /^(text/|charset=utf-8)$/.test(contentType)) {
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return response.text();
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}
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`
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fs.writeFileSync(tempFile, content, 'utf8')
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const result = fixFile(tempFile)
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expect(result.fixed).toBe(false)
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expect(result.error).toBe(null)
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})
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test('should handle non-existent file', () => {
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const nonExistentFile = path.join(tempDir, 'does-not-exist.js')
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const result = fixFile(nonExistentFile)
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expect(result.fixed).toBe(false)
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expect(result.error).toContain('ENOENT')
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})
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})
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describe('fixAllFiles', () => {
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let tempDir
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let tempFiles
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beforeEach(() => {
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tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'fix-regex-test-'))
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tempFiles = [
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path.join(tempDir, 'file1.js'),
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path.join(tempDir, 'file2.js'),
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path.join(tempDir, 'missing-file.js')
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]
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})
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afterEach(() => {
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// Clean up temp files
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tempFiles.forEach(file => {
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if (fs.existsSync(file)) {
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fs.unlinkSync(file)
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}
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})
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if (fs.existsSync(tempDir)) {
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fs.rmdirSync(tempDir)
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}
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})
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test('should process multiple files correctly', () => {
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// Create test files
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fs.writeFileSync(tempFiles[0], 'if (/^text/|charset=utf-8$/.test(x)) {}', 'utf8')
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fs.writeFileSync(tempFiles[1], 'if (/^(text/|charset=utf-8)$/.test(x)) {}', 'utf8')
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// tempFiles[2] intentionally not created (missing file)
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const result = fixAllFiles(tempFiles)
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expect(result.filesFixed).toBe(1)
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expect(result.results).toHaveLength(3)
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// Check first file was fixed
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expect(result.results[0].fixed).toBe(true)
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expect(result.results[0].error).toBe(null)
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// Check second file needed no changes
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expect(result.results[1].fixed).toBe(false)
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expect(result.results[1].error).toBe(null)
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// Check third file had error
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expect(result.results[2].fixed).toBe(false)
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expect(result.results[2].error).toContain('ENOENT')
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})
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test('should handle empty file list', () => {
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const result = fixAllFiles([])
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expect(result.filesFixed).toBe(0)
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expect(result.results).toHaveLength(0)
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})
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})
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describe('integration test', () => {
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test('should demonstrate regex operator precedence fix', () => {
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// The original problematic regex has misleading operator precedence
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const problematicPattern = /^text\/|charset=utf-8$/
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const fixedPattern = /^(text\/|charset=utf-8)$/
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// The problematic pattern means: (^text\/) OR (charset=utf-8$)
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// The fixed pattern means: ^(text\/ OR charset=utf-8)$
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// This demonstrates the precedence issue:
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expect(problematicPattern.test('text/plain')).toBe(true) // Matches start
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expect(problematicPattern.test('some charset=utf-8')).toBe(true) // Matches end
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// The fixed version is more restrictive and explicit:
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expect(fixedPattern.test('text/')).toBe(true)
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expect(fixedPattern.test('charset=utf-8')).toBe(true)
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expect(fixedPattern.test('text/plain')).toBe(false) // Doesn't match partial
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expect(fixedPattern.test('some charset=utf-8')).toBe(false) // Doesn't match partial
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})
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})
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})
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