add generation completeness test

test/generation.js

@@ -0,0 +1,17 @@
+var CodeGenerator = require("../lib/6to5/generator").CodeGenerator;
+var traverse      = require("../lib/6to5/traverse");
+var assert        = require("assert");
+var _             = require("lodash");
+
+suite("generation", function () {
+  test("completeness", function () {
+    _.each(traverse.VISITOR_KEYS, function (keys, type) {
+      assert.ok(!!CodeGenerator.prototype[type], type + " should exist");
+    });
+
+    _.each(CodeGenerator.prototype, function (fn, type) {
+      if (!/[A-Z]/.test(type[0])) return;
+      assert.ok(traverse.VISITOR_KEYS[type], type + " should not exist");
+    });
+  });
+});