Bug 1638147 - Introduce tests for MathML accessibility support on mac. r=morgan

Differential Revision: https://phabricator.services.mozilla.com/D75425

accessible/tests/browser/mac/browser.ini

@@ -22,3 +22,4 @@ support-files =
 [browser_aria_haspopup.js]
 [browser_required.js]
 [browser_popupbutton.js]
+[browser_mathml.js]

accessible/tests/browser/mac/browser_mathml.js

@@ -0,0 +1,151 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+"use strict";
+
+function testMathAttr(iface, attr, subrole, textLeafValue) {
+  ok(iface.attributeNames.includes(attr), `Object has ${attr} attribute`);
+  let value = iface.getAttributeValue(attr);
+  is(
+    value.getAttributeValue("AXSubrole"),
+    subrole,
+    `${attr} value has correct subrole`
+  );
+
+  if (textLeafValue) {
+    let children = value.getAttributeValue("AXChildren");
+    is(children.length, 1, `${attr} value has one child`);
+
+    is(
+      children[0].getAttributeValue("AXRole"),
+      "AXStaticText",
+      `${attr} value's child is static text`
+    );
+    is(
+      children[0].getAttributeValue("AXValue"),
+      textLeafValue,
+      `${attr} value has correct text`
+    );
+  }
+}
+
+addAccessibleTask(
+  `<math id="math">
+     <msqrt id="sqrt">
+      <mi>-1</mi>
+    </msqrt>
+    </math>`,
+  async (browser, accDoc) => {
+    let math = getNativeInterface(accDoc, "math");
+    is(
+      math.getAttributeValue("AXSubrole"),
+      "AXDocumentMath",
+      "Math element has correct subrole"
+    );
+
+    let sqrt = getNativeInterface(accDoc, "sqrt");
+    is(
+      sqrt.getAttributeValue("AXSubrole"),
+      "AXMathSquareRoot",
+      "msqrt has correct subrole"
+    );
+
+    testMathAttr(sqrt, "AXMathRootRadicand", "AXMathIdentifier", "-1");
+  }
+);
+
+addAccessibleTask(
+  `<math>
+    <mroot id="root">
+      <mi>x</mi>
+      <mn>3</mn>
+    </mroot>
+  </math>`,
+  async (browser, accDoc) => {
+    let root = getNativeInterface(accDoc, "root");
+    is(
+      root.getAttributeValue("AXSubrole"),
+      "AXMathRoot",
+      "mroot has correct subrole"
+    );
+
+    testMathAttr(root, "AXMathRootRadicand", "AXMathIdentifier", "x");
+    testMathAttr(root, "AXMathRootIndex", "AXMathNumber", "3");
+  }
+);
+
+addAccessibleTask(
+  `<math>
+    <mfrac id="fraction">
+      <mi>a</mi>
+      <mi>b</mi>
+     </mfrac>
+  </math>`,
+  async (browser, accDoc) => {
+    let fraction = getNativeInterface(accDoc, "fraction");
+    is(
+      fraction.getAttributeValue("AXSubrole"),
+      "AXMathFraction",
+      "mfrac has correct subrole"
+    );
+    ok(fraction.attributeNames.includes("AXMathFractionNumerator"));
+    ok(fraction.attributeNames.includes("AXMathFractionDenominator"));
+    ok(fraction.attributeNames.includes("AXMathLineThickness"));
+
+    // Bug 1639745
+    todo_is(fraction.getAttributeValue("AXMathLineThickness"), 1);
+
+    testMathAttr(fraction, "AXMathFractionNumerator", "AXMathIdentifier", "a");
+    testMathAttr(
+      fraction,
+      "AXMathFractionDenominator",
+      "AXMathIdentifier",
+      "b"
+    );
+  }
+);
+
+addAccessibleTask(
+  `<math>
+  <msubsup id="subsup">
+    <mo>∫</mo>
+    <mn>0</mn>
+    <mn>1</mn>
+  </msubsup>
+  </math>`,
+  async (browser, accDoc) => {
+    let subsup = getNativeInterface(accDoc, "subsup");
+    is(
+      subsup.getAttributeValue("AXSubrole"),
+      "AXMathSubscriptSuperscript",
+      "msubsup has correct subrole"
+    );
+
+    testMathAttr(subsup, "AXMathSubscript", "AXMathNumber", "0");
+    testMathAttr(subsup, "AXMathSuperscript", "AXMathNumber", "1");
+    testMathAttr(subsup, "AXMathBase", "AXMathOperator", "∫");
+  }
+);
+
+addAccessibleTask(
+  `<math>
+  <munderover id="underover">
+    <mo>∫</mo>
+    <mn>0</mn>
+    <mi>∞</mi>
+  </munderover>
+  </math>`,
+  async (browser, accDoc) => {
+    let underover = getNativeInterface(accDoc, "underover");
+    is(
+      underover.getAttributeValue("AXSubrole"),
+      "AXMathUnderOver",
+      "munderover has correct subrole"
+    );
+
+    testMathAttr(underover, "AXMathUnder", "AXMathNumber", "0");
+    testMathAttr(underover, "AXMathOver", "AXMathIdentifier", "∞");
+    testMathAttr(underover, "AXMathBase", "AXMathOperator", "∫");
+  }
+);