Merge pull request #269 from mathjax/issue248

[main] GetSemantic: add string conversion

Author: pkra

lib/main.js

@@ -549,9 +549,8 @@ function GetSpeech(result) {
 function GetSemantic(result) {
   if (!data.semantic) return;
   result.streeJson = speech.toJson(result.mml);
-  result.streeXml = data.minSTree ?
-    speech.toSemantic(result.mml) :
-    speech.pprintXML(speech.toSemantic(result.mml));
+  var xml = speech.toSemantic(result.mml).toString();
+  result.streeXml = data.minSTree ? xml : speech.pprintXML(xml);
 }
 
 //

test/sre-semantictree.js

@@ -0,0 +1,20 @@
+var tape = require('tape');
+var mjAPI = require("../lib/main.js");
+
+tape('semanticTree: basic test', function(t) {
+  t.plan(2);
+
+  var tex = 'a+b=c';
+  mjAPI.start();
+
+  mjAPI.typeset({
+    math: tex,
+    format: "TeX",
+    mml: true,
+    speakText: true,
+    semantic: true
+  }, function(data) {
+    t.ok(data.streeJson, 'semantic tree JSON');
+    t.ok(data.streeXml, 'semantic tree XML');
+  });
+});