Fix Comments being lost around modules (#199)

Fix Comments being lost around modules

Author: Robert Jackson

transforms/convert-module-for-to-setup-test/__testfixtures__/module-with-comments.input.js

@@ -0,0 +1,6 @@
+//import RSVP from 'rsvp';
+import { module } from 'qunit';
+
+module('Unit | whatever');
+
+// test('commented out test', function(assert) {});

transforms/convert-module-for-to-setup-test/__testfixtures__/module-with-comments.output.js

@@ -0,0 +1,6 @@
+//import RSVP from 'rsvp';
+import { module } from 'qunit';
+
+module('Unit | whatever', function() {});
+
+// test('commented out test', function(assert) {});

transforms/convert-module-for-to-setup-test/index.js

@@ -77,6 +77,9 @@ module.exports = function(file, api) {
         subject = j.literal(`model:${calleeArguments[0].value}`);
       }
 
+      this.comments = p.node.comments;
+      this.trailingComments = p.node.trailingComments;
+
       this.originalSetupType = calleeName;
       this.moduleName = moduleName;
       this.moduleOptions = options;
@@ -451,6 +454,8 @@ module.exports = function(file, api) {
         }
       }
 
+      moduleInvocation.comments = moduleInfo.comments;
+      moduleInvocation.trailingComments = moduleInfo.trailingComments;
       moduleInfo.moduleInvocation = moduleInvocation;
 
       if (needsHooks === true) {