fix(aria snapshots): normalize whitespace (#34285)

Author: dgozman

packages/playwright-core/src/server/injected/ariaSnapshot.ts

@@ -16,7 +16,7 @@
 
 import * as roleUtils from './roleUtils';
 import { getElementComputedStyle } from './domUtils';
-import { escapeRegExp, longestCommonSubstring } from '@isomorphic/stringUtils';
+import { escapeRegExp, longestCommonSubstring, normalizeWhiteSpace } from '@isomorphic/stringUtils';
 import { yamlEscapeKeyIfNeeded, yamlEscapeValueIfNeeded } from './yaml';
 import type { AriaProps, AriaRole, AriaTemplateNode, AriaTemplateRoleNode, AriaTemplateTextNode } from '@isomorphic/ariaSnapshot';
 
@@ -137,7 +137,7 @@ function toAriaNode(element: Element): AriaNode | null {
   if (!role || role === 'presentation' || role === 'none')
     return null;
 
-  const name = roleUtils.getElementAccessibleName(element, false) || '';
+  const name = normalizeWhiteSpace(roleUtils.getElementAccessibleName(element, false) || '');
   const result: AriaNode = { role, name, children: [], element };
 
   if (roleUtils.kAriaCheckedRoles.includes(role))
@@ -170,7 +170,7 @@ function normalizeStringChildren(rootA11yNode: AriaNode) {
   const flushChildren = (buffer: string[], normalizedChildren: (AriaNode | string)[]) => {
     if (!buffer.length)
       return;
-    const text = normalizeWhitespaceWithin(buffer.join('')).trim();
+    const text = normalizeWhiteSpace(buffer.join(''));
     if (text)
       normalizedChildren.push(text);
     buffer.length = 0;
@@ -196,8 +196,6 @@ function normalizeStringChildren(rootA11yNode: AriaNode) {
   visit(rootA11yNode);
 }
 
-const normalizeWhitespaceWithin = (text: string) => text.replace(/[\u200b\s\t\r\n]+/g, ' ');
-
 function matchesText(text: string, template: RegExp | string | undefined): boolean {
   if (!template)
     return true;

packages/playwright-core/src/utils/isomorphic/ariaSnapshot.ts

@@ -212,7 +212,7 @@ class KeyParser {
     const ch = this._peek();
     if (ch === '"') {
       this._next();
-      return this._readString();
+      return normalizeWhitespace(this._readString());
     }
 
     if (ch === '/') {

tests/page/page-aria-snapshot.spec.ts

@@ -509,6 +509,32 @@ it('should escape yaml text in text nodes', async ({ page }) => {
   `);
 });
 
+it('should normalize whitespace', async ({ page }) => {
+  await page.setContent(`
+    <details>
+      <summary> one  \n two <a href="#"> link &nbsp;\n  1 </a> </summary>
+    </details>
+    <input value='  hello   &nbsp; world '>
+  `);
+
+  await checkAndMatchSnapshot(page.locator('body'), `
+    - group:
+      - text: one two
+      - link "link 1"
+    - textbox: hello world
+  `);
+
+  // Weird whitespace in the template should be normalized.
+  await expect(page.locator('body')).toMatchAriaSnapshot(`
+    - group:
+      - text: |
+          one
+          two
+      - link "  link     1 "
+    - textbox:        hello  world
+  `);
+});
+
 it('should handle long strings', async ({ page }) => {
   const s = 'a'.repeat(10000);
   await page.setContent(`