method for removing comments from a stringified function

lib/utils.js

@@ -149,6 +149,12 @@ var Utils = module.exports = {
       a[key] = b[key]
     }
     return a
+  },
+  removeCommentsFromFunctionString: function(s) {
+    s = s.replace(/\s*(\/\/.*)/g, '')
+    s = s.replace(/(\/\*[\n\r\s\S]*?\*\/)/mg, '')
+
+    return s
   }
 }
 

spec/utils.spec.js

+var Utils = require('../lib/utils')
+
+describe('Utils', function() {
+  describe('removeCommentsFromFunctionString', function() {
+    it("removes line comments at the start of a line", function() {
+      var functionWithLineComments = function() {
+        // noot noot
+      }
+
+      var result = Utils.removeCommentsFromFunctionString(functionWithLineComments.toString())
+      expect(result).toNotMatch(/.*noot.*/)
+    })
+
+    it("removes lines comments in the middle of a line", function() {
+      var functionWithLineComments = function() {
+        alert(1) // noot noot
+      }
+
+      var result = Utils.removeCommentsFromFunctionString(functionWithLineComments.toString())
+      expect(result).toNotMatch(/.*noot.*/)
+    })
+
+    it("removes range comments", function() {
+      var s = function() {
+        alert(1) /*
+          noot noot
+        */
+        alert(2) /*
+          foo
+        */
+      }.toString()
+
+      var result = Utils.removeCommentsFromFunctionString(s)
+      expect(result).toNotMatch(/.*noot.*/)
+      expect(result).toNotMatch(/.*foo.*/)
+      expect(result).toMatch(/.*alert\(2\).*/)
+    })
+  })
+})