Merge pull request #48 from alexander-alvarez/empty-import-bugfix

Empty import bugfix

Author: rwjblue

__testfixtures__/ember-qunit-codemod/remove-empty-import.input.js

@@ -0,0 +1 @@
+import { module, test } from 'ember-qunit';

__testfixtures__/ember-qunit-codemod/remove-empty-import.output.js

@@ -0,0 +1 @@
+import { module, test } from 'qunit';

ember-qunit-codemod.js

@@ -119,6 +119,11 @@ module.exports = function(file, api, options) {
     emberQUnitImports
       .get('specifiers')
       .replace(Array.from(emberQUnitSpecifiers).map(s => j.importSpecifier(j.identifier(s))));
+
+    // If we have an empty import, remove the import declaration
+    if (emberQUnitSpecifiers.size === 0) {
+      emberQUnitImports.remove();
+    }
   }
 
   function updateEmberTestHelperImports() {