fixed editor component spec

ee/app/assets/javascripts/ide/components/repo_editor.vue

@@ -90,7 +90,7 @@ export default {
       });
     },
     setupEditor() {
-      if (!this.activeFile) return;
+      if (!this.activeFile || !this.editor.instance) return;
 
       this.model = this.editor.createModel(this.activeFile);
 

spec/javascripts/ide/components/repo_editor_spec.js

@@ -63,7 +63,7 @@ describe('RepoEditor', () => {
 
   describe('createEditorInstance', () => {
     it('calls createInstance when viewer is editor', (done) => {
-      spyOn(vm.editor, 'createInstance').and.callThrough();
+      spyOn(vm.editor, 'createInstance');
 
       vm.createEditorInstance();
 
@@ -77,7 +77,7 @@ describe('RepoEditor', () => {
     it('calls createDiffInstance when viewer is diff', (done) => {
       vm.$store.state.viewer = 'diff';
 
-      spyOn(vm.editor, 'createDiffInstance').and.callThrough();
+      spyOn(vm.editor, 'createDiffInstance');
 
       vm.createEditorInstance();