1 files changed, 119 insertions, 17 deletions
diff --git a/testing/web-platform/tests/mathml/presentation-markup/mrow/legacy-mstyle-attributes.html b/testing/web-platform/tests/mathml/presentation-markup/mrow/legacy-mstyle-attributes.html
index 2463c40476..0b14ac5334 100644
--- a/testing/web-platform/tests/mathml/presentation-markup/mrow/legacy-mstyle-attributes.html
+++ b/testing/web-platform/tests/mathml/presentation-markup/mrow/legacy-mstyle-attributes.html
@@ -35,11 +35,12 @@
 </head>
 <body>
   <div id="log"></div>
-  <!-- Note: mpadded attributes are not tested since MathML3 did not allow to
-       set them from mstyle. Also, it is not clear whether munderover's
-       accent/accentunder could be applied from mstyle, given that the former
-       clashes with mo@accent. Other legacy mstyle attributes not in MathML
-       Core or without visual effect are not tested.
+  <!-- Note: In earlier versions of MathML, putting some attributes on the
+       mstyle element was supposed to produce the same rendering as putting them
+       on the all descendants (with some exceptions). In MathML Core, relevant
+       style attributes are implemented as CSS properties and are no longer
+       specific to the mstyle element. The tests below verify that attributes
+       on mstyle that are not mapped to CSS have no effect.
     -->
   <p class="TestContainer" id="mspace">
     <math>
@@ -84,12 +85,12 @@
           <mn>3</mn>
         </munder>
       </mstyle>
-      <mstyle accent="false">
-        <mover>
-          <mn>4</mn>
-          <mo>⇀</mo>
-        </mover>
-      </mstyle>
+      <!-- Note: accent was a shared attribute name for mover and mo, so
+           make mstyle an ancestor of mo but not of mover. -->
+      <mover>
+        <mn>4</mn>
+        <mstyle accent="false"><mo>⇀</mo></mstyle>
+      </mover>
       <mstyle stretchy="false" symmetric="false" maxsize="20px">
         <mrow>
           <mo>|</mo>
@@ -102,6 +103,15 @@
           <mn>4</mn>
         </mrow>
       </mstyle>
+      <mstyle form="prefix">
+        <mrow>
+          <mn>1</mn>
+          <!-- Infix and prefix forms of − do not have the same lspace/rspace
+               values in the operator dictionary -->
+          <mo>−</mo>
+          <mn>2</mn>
+        </mrow>
+      </mstyle>
     </math>
     <math displaystyle="true">
       <mstyle>
@@ -115,12 +125,10 @@
           <mn>3</mn>
         </munder>
       </mstyle>
-      <mstyle>
-        <mover>
-          <mn>4</mn>
-          <mo>⇀</mo>
-        </mover>
-      </mstyle>
+      <mover>
+        <mn>4</mn>
+        <mstyle><mo>⇀</mo></mstyle>
+      </mover>
       <mstyle>
         <mrow>
           <mo>|</mo>
@@ -133,6 +141,13 @@
           <mn>4</mn>
         </mrow>
       </mstyle>
+      <mstyle>
+        <mrow>
+          <mn>1</mn>
+          <mo>−</mo>
+          <mn>2</mn>
+        </mrow>
+      </mstyle>
     </math>
   </p>
   <!-- notation attribute is from MathML3's menclose element -->
@@ -160,5 +175,92 @@
       </mstyle>
     </math>
   </p>
+  <p class="TestContainer" id="mpadded">
+    <math>
+      <mstyle width="100px" height="50px" depth="50px"
+              lspace="10px" voffset="15px">
+        <mpadded style="background: lightblue">
+          <mspace width="10px" height="10px" style="background: black"></mspace>
+        </mpadded>
+      </mstyle>
+    </math>
+    <math>
+      <mstyle>
+        <mpadded style="background: lightblue">
+          <mspace width="10px" height="10px" style="background: black"></mspace>
+        </mpadded>
+      </mstyle>
+    </math>
+  </p>
+  <p class="TestContainer" id="mover">
+    <math>
+      <mstyle accent="true">
+        <mover>
+          <mn>1</mn>
+          <mn>2</mn>
+        </mover>
+      </mstyle>
+    </math>
+    <math>
+      <mstyle>
+        <mover>
+          <mn>1</mn>
+          <mn>2</mn>
+        </mover>
+      </mstyle>
+    </math>
+  </p>
+  <p class="TestContainer" id="munder">
+    <math>
+      <mstyle accentunder="true">
+        <munder>
+          <mn>1</mn>
+          <mn>2</mn>
+        </munder>
+      </mstyle>
+    </math>
+    <math>
+      <mstyle>
+        <munder>
+          <mn>1</mn>
+          <mn>2</mn>
+        </munder>
+      </mstyle>
+    </math>
+  </p>
+  <p class="TestContainer" id="munderover">
+    <math>
+      <mstyle accent="true">
+        <munderover>
+          <mn>1</mn>
+          <mn>2</mn>
+          <mn>3</mn>
+        </munderover>
+      </mstyle>
+      <mstyle accentunder="true">
+        <munderover>
+          <mn>1</mn>
+          <mn>2</mn>
+          <mn>3</mn>
+        </munderover>
+      </mstyle>
+    </math>
+    <math>
+      <mstyle>
+        <munderover>
+          <mn>1</mn>
+          <mn>2</mn>
+          <mn>3</mn>
+        </munderover>
+      </mstyle>
+      <mstyle>
+        <munderover>
+          <mn>1</mn>
+          <mn>2</mn>
+          <mn>3</mn>
+        </munderover>
+      </mstyle>
+    </math>
+  </p>
 </body>
 </html>