More meaningful test

use lowecase, uppercase and special characters around the toUpperCase function to prove the custom applied function works as intended

test/partial-test.js

@@ -113,14 +113,14 @@ describe('Partials spec', function () {
     it('Partial without indentation should inherit functions.', function () {
       var template = '{{> partial }}';
       var data = {
-        t: function () {
+        toUpperCase: function () {
               return function (label) {
                       return label.toUpperCase();
               };
         }
       };
-      var partials = {partial: '{{ #t }}Input{{ /t }}:'};
-      var expected = 'INPUT:';
+      var partials = {partial: 'aA-{{ #toUpperCase }}Input{{ /toUpperCase }}-Aa'};
+      var expected = 'aA-INPUT-Aa';
       var renderResult = Mustache.render(template, data, partials);
       assert.equal(renderResult, expected);
     });
@@ -128,14 +128,14 @@ describe('Partials spec', function () {
     it('Partial with indentation should inherit functions.', function () {
       var template = '  {{> partial }}';
       var data = {
-        t: function () {
+        toUpperCase: function () {
               return function (label) {
                       return label.toUpperCase();
               };
         }
       };
-      var partials = {partial: '{{ #t }}Input{{ /t }}:'};
-      var expected = '  INPUT:';
+      var partials = {partial: 'aA-{{ #toUpperCase }}Input{{ /toUpperCase }}-Aa'};
+      var expected = '  aA-INPUT-Aa';
       var renderResult = Mustache.render(template, data, partials);
       assert.equal(renderResult, expected);
     });