Wrap test cases in parentheses

This lets people use test cases like:

    10 + something(20)
    // => 30

Author: yamadapc

examples/add.js

@@ -9,6 +9,7 @@
  *    add(10, 20)
  *    // => 30
  *    add(10, 50) // => 60
+ *    10 + add(10, 50) // => 70
  */
 
 function add(x, y) {

lib/index.js

@@ -93,7 +93,7 @@ exports.toJsdocRegister = function jsdoctest$toJsdocRegister(comment) {
   var compiled = _.map(comment.examples, function(example) {
     var id = baseId + example.testCase + ' => ' + example.expectedResult;
     var fn = 'function() {' +
-      example.testCase + '.should.equal(' + example.expectedResult + ');' +
+      '(' + example.testCase + ').should.equal(' + example.expectedResult + ');' +
     '}';
     return '__registerTest(\'' + id + '\', ' + fn + ');';
   }).join('');

lib/mocha.js

@@ -48,7 +48,7 @@ exports.commentToMochaSpec = function commentToMochaSpec(comment) {
   return '\ndescribe(\'' + ctx.string + '\', function() {' +
          _.map(comment.examples, function(example) {
            return 'it(\'' + example.testCase + '\', function() {' +
-                     example.testCase +
+                     '(' + example.testCase + ')' +
                        '.should.eql(' + example.expectedResult + ');' +
                   '});';
          }).join('\n') +

test/mocha.test.js

@@ -17,7 +17,7 @@ describe('jsdoctest/mocha', function() {
         content.should.containEql(
         '\ndescribe(\'add()\', function() {' +
             'it(\'add(1, 2)\', function() {' +
-              'add(1, 2).should.eql(3);' +
+              '(add(1, 2)).should.eql(3);' +
             '});' +
           '});'
         );