Add test cases for custom functions in partials

test/partial-test.js

@@ -109,4 +109,22 @@ describe('Partials spec', function () {
       var renderResult = Mustache.render(template, data, partials);
       assert.equal(renderResult, expected);
     });
-});
+
+    it('Partial should inherit functions without indentation.', function () {
+      var template = '{{> partial }}';
+      var data = {t: () => (label) => label.toUpperCase()};
+      var partials = {partial: '{{ #t }}Input{{ /t }}:'};
+      var expected = 'INPUT:';
+      var renderResult = Mustache.render(template, data, partials);
+      assert.equal(renderResult, expected);
+    });
+
+    it('Partial should inherit functions with indentation.', function () {
+      var template = '  {{> partial }}';
+      var data = {t: () => (label) => label.toUpperCase()};
+      var partials = {partial: '{{ #t }}Input{{ /t }}:'};
+      var expected = '  INPUT:';
+      var renderResult = Mustache.render(template, data, partials);
+      assert.equal(renderResult, expected);
+    });
+});