chore: revert "fix(test-runner): escape backslashes in win cli (#11763)" (#12004)

packages/playwright-test/src/cli.ts

@@ -181,7 +181,7 @@ function forceRegExp(pattern: string): RegExp {
   const match = pattern.match(/^\/(.*)\/([gi]*)$/);
   if (match)
     return new RegExp(match[1], match[2]);
-  return new RegExp(pattern.replace(/\\/g, '\\\\'), 'gi');
+  return new RegExp(pattern, 'gi');
 }
 
 function overridesFromOptions(options: { [key: string]: any }): Config {

tests/playwright-test/command-line-filter.spec.ts

@@ -15,7 +15,6 @@
  */
 
 import { test, expect } from './playwright-test-fixtures';
-import path from 'path';
 
 test('should filter by file name', async ({ runInlineTest }) => {
   const result = await runInlineTest({
@@ -94,14 +93,6 @@ test('should run nothing for missing line', async ({ runInlineTest }) => {
   expect(result.failed).toBe(1);
 });
 
-test('should escape path on windows', async ({ runInlineTest }) => {
-  const result = await runInlineTest({
-    'foo/test.spec.ts': `pwt.test('fails', () => { expect(1).toBe(2); });`,
-  }, undefined, undefined, { additionalArgs: [path.join('foo', 'test.spec.ts')] });
-  expect(result.exitCode).toBe(1);
-  expect(result.failed).toBe(1);
-});
-
 test('should focus a single nested test spec', async ({ runInlineTest }) => {
   const result = await runInlineTest({
     'foo.test.ts': `

tests/playwright-test/test-ignore.spec.ts

@@ -185,7 +185,7 @@ test('should match cli string argument', async ({ runInlineTest }) => {
       const { test } = pwt;
       test('pass', ({}) => {});
     `
-  }, {}, {}, { additionalArgs: [`dir${path.sep}a`] });
+  }, {}, {}, { additionalArgs: [`dir\\${path.sep}a`] });
   expect(result.passed).toBe(1);
   expect(result.report.suites.map(s => s.file).sort()).toEqual(['a.test.ts']);
   expect(result.exitCode).toBe(0);