Supporting Windows paths in the filename normalization.

tools/playwright/src/utils.ts

@@ -6,16 +6,20 @@
 /**
  * Normalizes a file path by removing webpack:// prefixes and similar bundler artifacts.
  * Handles cases where webpack:/ appears in the middle of the path.
+ * Supports both forward slashes (Unix) and backslashes (Windows).
  * Examples:
  *   webpack:/@scope/package/src/file.ts -> @scope/package/src/file.ts
  *   prefix/webpack:/@scope/package/src/file.ts -> @scope/package/src/file.ts
+ *   D:\path\webpack:\@scope\package\file.ts -> @scope/package/file.ts
  *   /absolute/path/to/file.ts -> /absolute/path/to/file.ts
  */
 export function normalizeFilePath(filePath: string): string {
-  // Find webpack:/ or webpack:// anywhere in the path and extract everything after it
-  const webpackMatch = filePath.match(/webpack:\/\/?(.+)/);
+  // Find webpack:/ or webpack:// or webpack:\ anywhere in the path and extract everything after it
+  // Handles both Unix (/) and Windows (\) path separators
+  const webpackMatch = filePath.match(/webpack:[/\\]{1,2}(.+)/);
   if (webpackMatch) {
-    return webpackMatch[1];
+    // Normalize backslashes to forward slashes for consistency
+    return webpackMatch[1].replace(/\\/g, "/");
   }
 
   // Remove any leading ./ from regular paths

tools/playwright/tests/utils.spec.ts

@@ -56,4 +56,24 @@ test.describe("normalizeFilePath", () => {
   test("should handle empty string", () => {
     expect(normalizeFilePath("")).toBe("");
   });
+
+  test("should handle Windows path with webpack:\\ (backslash)", () => {
+    const input =
+      "D:\\a\\_work\\1\\a\\project\\tests\\webpack:\\package\\tests\\file.spec.ts";
+    const expected = "package/tests/file.spec.ts";
+    expect(normalizeFilePath(input)).toBe(expected);
+  });
+
+  test("should normalize backslashes to forward slashes in webpack paths", () => {
+    const input = "webpack:\\package\\src\\nested\\file.spec.ts";
+    const expected = "package/src/nested/file.spec.ts";
+    expect(normalizeFilePath(input)).toBe(expected);
+  });
+
+  test("should handle Windows CI path with webpack in the middle", () => {
+    const input =
+      "D:\\build\\agent\\project\\tests\\webpack:\\lib\\tests\\feature.spec.ts";
+    const expected = "lib/tests/feature.spec.ts";
+    expect(normalizeFilePath(input)).toBe(expected);
+  });
 });