fix: add default value when destructuring collaborator options (#966)

fix: add default value when destructuring collaborator options

src/components/EditCoursePage/EditCourseForm.jsx

@@ -268,7 +268,7 @@ export class BaseEditCourseForm extends React.Component {
 
     const {
       data: {
-        results: allResults,
+        results: allResults = [],
       },
     } = collaboratorOptions;
 

src/components/EditCoursePage/EditCourseForm.test.jsx

@@ -474,4 +474,24 @@ describe('BaseEditCourseForm', () => {
     const fields = component.find({ name: 'imageSrc' });
     expect(fields).toHaveLength(1);
   });
+
+  it('renders html correctly while fetching collaborator options', () => {
+    const component = shallow(<BaseEditCourseForm
+      handleSubmit={() => null}
+      initialValues={{
+        title: initialValuesFull.title,
+      }}
+      title={initialValuesFull.title}
+      number="Test101x"
+      courseStatuses={[UNPUBLISHED]}
+      courseInfo={courseInfo}
+      courseOptions={courseOptions}
+      courseRunOptions={courseRunOptions}
+      uuid={initialValuesFull.uuid}
+      type={initialValuesFull.type}
+      id="edit-course-form"
+      collaboratorOptions={{ data: {} }}
+    />);
+    expect(shallowToJson(component)).toMatchSnapshot();
+  });
 });