tor-browser

commit 093fd1b8d1ef2ff5b46908bdf7c3d4013e7ae579
parent 067b8e963928a39eadca429969ae77edc8b01f29
Author: Jan Varga <jvarga@igalia.com>
Date:   Tue, 18 Nov 2025 11:55:59 +0000

Bug 1990419 - Add WPT for rejecting CSSStyleValue with mismatched associated property; r=emilio

Add a new Web Platform Test verifying that StylePropertyMap.set() throws a
TypeError when a CSSStyleValue with an existing [[associatedProperty]] does
not match the property being assigned to.

Differential Revision: https://phabricator.services.mozilla.com/D271810

Diffstat:
M
testing/web-platform/meta/css/css-typed-om/the-stylepropertymap/declared/set.tentative.html.ini
 | 
3
+++
M
testing/web-platform/meta/css/css-typed-om/the-stylepropertymap/inline/set.tentative.html.ini
 | 
3
+++
M
testing/web-platform/tests/css/css-typed-om/the-stylepropertymap/declared/set.tentative.html
 | 
11
+++++++++++
M
testing/web-platform/tests/css/css-typed-om/the-stylepropertymap/inline/set.tentative.html
 | 
11
+++++++++++

4 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/testing/web-platform/meta/css/css-typed-om/the-stylepropertymap/declared/set.tentative.html.ini b/testing/web-platform/meta/css/css-typed-om/the-stylepropertymap/declared/set.tentative.html.ini
@@ -31,3 +31,6 @@
 
   [StylePropertyMap.set is case-insensitive]
     expected: FAIL
+
+  [Setting a property with a CSSStyleValue whose associated property does not match throws TypeError]
+    expected: FAIL
diff --git a/testing/web-platform/meta/css/css-typed-om/the-stylepropertymap/inline/set.tentative.html.ini b/testing/web-platform/meta/css/css-typed-om/the-stylepropertymap/inline/set.tentative.html.ini
@@ -31,3 +31,6 @@
 
   [StylePropertyMap.set is case-insensitive]
     expected: FAIL
+
+  [Setting a property with a CSSStyleValue whose associated property does not match throws TypeError]
+    expected: FAIL
diff --git a/testing/web-platform/tests/css/css-typed-om/the-stylepropertymap/declared/set.tentative.html b/testing/web-platform/tests/css/css-typed-om/the-stylepropertymap/declared/set.tentative.html
@@ -95,4 +95,15 @@ test(t => {
   assert_style_value_array_equals(result, [CSS.s(1), CSS.s(2)]);
 }, 'StylePropertyMap.set is case-insensitive');
 
+test(t => {
+  let styleMap = createDeclaredStyleMap(t, 'margin: 10px');
+
+  const result = styleMap.get('margin');
+  assert_equals(result.constructor.name, 'CSSStyleValue');
+
+  assert_throws_js(TypeError, () => {
+    styleMap.set('padding', result);
+  });
+}, 'Setting a property with a CSSStyleValue whose associated property does not match throws TypeError');
+
 </script>
diff --git a/testing/web-platform/tests/css/css-typed-om/the-stylepropertymap/inline/set.tentative.html b/testing/web-platform/tests/css/css-typed-om/the-stylepropertymap/inline/set.tentative.html
@@ -95,4 +95,15 @@ test(t => {
   assert_style_value_array_equals(result, [CSS.s(1), CSS.s(2)]);
 }, 'StylePropertyMap.set is case-insensitive');
 
+test(t => {
+  let styleMap = createInlineStyleMap(t, 'margin: 10px');
+
+  const result = styleMap.get('margin');
+  assert_equals(result.constructor.name, 'CSSStyleValue');
+
+  assert_throws_js(TypeError, () => {
+    styleMap.set('padding', result);
+  });
+}, 'Setting a property with a CSSStyleValue whose associated property does not match throws TypeError');
+
 </script>