Add Windows-specific tests for path matching with backslashes

Co-authored-by: salmanmkc <32169182+salmanmkc@users.noreply.github.com>

packages/glob/__tests__/windows-path-matching.test.ts

@@ -0,0 +1,80 @@
+/**
+ * Test to validate that glob works correctly on Windows with backslash paths
+ * This test validates the fix for: https://github.com/actions/toolkit/issues/<issue_number>
+ */
+
+import * as path from 'path'
+import {MatchKind} from '../src/internal-match-kind'
+import {Pattern} from '../src/internal-pattern'
+
+const IS_WINDOWS = process.platform === 'win32'
+
+describe('Windows path matching', () => {
+  it('matches paths with backslashes on Windows', () => {
+    if (!IS_WINDOWS) {
+      // This test is only relevant on Windows
+      return
+    }
+
+    // Test basic pattern matching with Windows paths
+    const pattern = new Pattern('C:\\Users\\test\\*')
+    
+    // The itemPath would come from fs.readdir with backslashes on Windows
+    const itemPath = 'C:\\Users\\test\\file.txt'
+    
+    // This should match because the pattern and path both refer to the same file
+    expect(pattern.match(itemPath)).toBe(MatchKind.All)
+  })
+
+  it('partial matches work with backslashes on Windows', () => {
+    if (!IS_WINDOWS) {
+      return
+    }
+
+    // Test partial matching with Windows paths
+    const pattern = new Pattern('C:\\Users\\test\\**')
+    
+    // Should partially match parent directory
+    expect(pattern.partialMatch('C:\\Users')).toBe(true)
+    expect(pattern.partialMatch('C:\\Users\\test')).toBe(true)
+  })
+
+  it('matches globstar patterns with backslashes on Windows', () => {
+    if (!IS_WINDOWS) {
+      return
+    }
+
+    const pattern = new Pattern('C:\\foo\\**')
+    
+    // Should match the directory itself and descendants
+    expect(pattern.match('C:\\foo')).toBe(MatchKind.All)
+    expect(pattern.match('C:\\foo\\bar')).toBe(MatchKind.All)
+    expect(pattern.match('C:\\foo\\bar\\baz.txt')).toBe(MatchKind.All)
+  })
+
+  it('matches wildcard patterns with mixed separators on Windows', () => {
+    if (!IS_WINDOWS) {
+      return
+    }
+
+    // Pattern might be specified with forward slashes by user
+    const pattern = new Pattern('C:/Users/*/file.txt')
+    
+    // But the actual path from filesystem will have backslashes
+    expect(pattern.match('C:\\Users\\test\\file.txt')).toBe(MatchKind.All)
+  })
+
+  it('handles complex patterns with backslashes on Windows', () => {
+    if (!IS_WINDOWS) {
+      return
+    }
+
+    const currentDrive = process.cwd().substr(0, 2)
+    const pattern = new Pattern(`${currentDrive}\\**\\*.txt`)
+    
+    // Should match .txt files at any depth
+    expect(pattern.match(`${currentDrive}\\file.txt`)).toBe(MatchKind.All)
+    expect(pattern.match(`${currentDrive}\\foo\\bar\\test.txt`)).toBe(MatchKind.All)
+    expect(pattern.match(`${currentDrive}\\foo\\bar\\test.js`)).toBe(MatchKind.None)
+  })
+})