Add test case for my change

test/unit/publicapi.test.js

diff --git a/test/unit/publicapi.test.js b/test/unit/publicapi.test.js
index ac0a219..285699c 100644
--- a/test/unit/publicapi.test.js
+++ b/test/unit/publicapi.test.js
@@ -144,6 +144,8 @@
       assert.equal(mq.text(), '3^4');
       mq.latex('3x+\\ 4');
       assert.equal(mq.text(), '3*x+ 4');
+      mq.latex('x^2');
+      assert.equal(mq.text(), 'x**2')
     });
 
     test('.moveToDirEnd(dir)', function() {