Fix scanning for "and" in mixed fractions

src/commands/math/commands.ts

@@ -966,22 +966,27 @@ var Fraction =
             // Handle the case of an integer followed by a simplified fraction such as 1\frac{1}{2}.
             // Such combinations should be spoken aloud as "1 and 1 half."
             // Start at the left sibling of the fraction and continue leftward until something other than a digit or whitespace is found.
-            var precededByInteger = false;
+            let sawDigit = false;
+
+            let sibling;
+            // Scan until you see something other than a digit or space
             for (
-              var sibling: NodeRef | undefined = this[L];
-              sibling && sibling[L] !== undefined;
+              sibling = this[L];
+              sibling &&
+              sibling.ctrlSeq &&
+              (sibling.ctrlSeq === '\\ ' || intRgx.test(sibling.ctrlSeq ?? ''));
               sibling = sibling[L]
             ) {
-              // Ignore whitespace
-              if (sibling.ctrlSeq === '\\ ') {
-                continue;
-              } else if (intRgx.test(sibling.ctrlSeq || '')) {
-                precededByInteger = true;
-              } else {
-                precededByInteger = false;
-                break;
+              if (intRgx.test(sibling.ctrlSeq)) {
+                sawDigit = true;
               }
             }
+            const lastNodeSeen = sibling;
+
+            // `precededByInteger` is true if everything we saw while scanning is digits and spaces, and
+            // we saw at least one digit.
+            const precededByInteger =
+              sawDigit && !(lastNodeSeen && lastNodeSeen.ctrlSeq === '.');
             if (precededByInteger) {
               output += 'and ';
             }

test/unit/aria.test.js

@@ -255,6 +255,36 @@ suite('aria', function () {
     assertAriaEqual('left parenthesis');
   });
 
+  test('testing mathspeak for mixed fractions', function () {
+    const mq = mathField;
+    mq.latex('1+2\\frac{3}{4}');
+    mq.select();
+    assert.equal(mq.mathspeak().trim(), '1 plus 2 and 3 fourths');
+
+    mq.latex('1.2\\frac{3}{4}');
+    mq.select();
+    assert.equal(mq.mathspeak().trim(), '1.2 3 fourths');
+
+    mq.latex('a\\frac{3}{4}');
+    mq.select();
+    assert.equal(mq.mathspeak().trim(), '"a" 3 fourths');
+
+    mq.latex('a1\\frac{3}{4}');
+    mq.select();
+    assert.equal(mq.mathspeak().trim(), '"a" 1 and 3 fourths');
+
+    mq.latex('1\\left(x\\right)\\frac{3}{4}');
+    mq.select();
+    assert.equal(
+      mq.mathspeak().trim(),
+      '1 left parenthesis, "x" , right parenthesis 3 fourths'
+    );
+
+    mq.latex('1+2\\ \\ \\frac{3}{4}');
+    mq.select();
+    assert.equal(mq.mathspeak().trim(), '1 plus 2 and 3 fourths');
+  });
+
   test('testing beginning and end alerts', function () {
     mathField.typedText('sqrt(x)');
     mathField.keystroke('Home');