1 files changed, 93 insertions, 0 deletions
diff --git a/spec/frontend/sidebar/components/reference/sidebar_reference_widget_spec.js b/spec/frontend/sidebar/components/reference/sidebar_reference_widget_spec.js
new file mode 100644
index 00000000000..1dbb7702a15
--- /dev/null
+++ b/spec/frontend/sidebar/components/reference/sidebar_reference_widget_spec.js
@@ -0,0 +1,93 @@
+import { GlLoadingIcon } from '@gitlab/ui';
+import { shallowMount } from '@vue/test-utils';
+import Vue from 'vue';
+import VueApollo from 'vue-apollo';
+import createMockApollo from 'helpers/mock_apollo_helper';
+import waitForPromises from 'helpers/wait_for_promises';
+import { IssuableType } from '~/issue_show/constants';
+import SidebarReferenceWidget from '~/sidebar/components/reference/sidebar_reference_widget.vue';
+import issueReferenceQuery from '~/sidebar/queries/issue_reference.query.graphql';
+import mergeRequestReferenceQuery from '~/sidebar/queries/merge_request_reference.query.graphql';
+import ClipboardButton from '~/vue_shared/components/clipboard_button.vue';
+import { issueReferenceResponse } from '../../mock_data';
+
+describe('Sidebar Reference Widget', () => {
+  let wrapper;
+  let fakeApollo;
+  const referenceText = 'reference';
+
+  const createComponent = ({
+    issuableType,
+    referenceQuery = issueReferenceQuery,
+    referenceQueryHandler = jest.fn().mockResolvedValue(issueReferenceResponse(referenceText)),
+  } = {}) => {
+    Vue.use(VueApollo);
+
+    fakeApollo = createMockApollo([[referenceQuery, referenceQueryHandler]]);
+
+    wrapper = shallowMount(SidebarReferenceWidget, {
+      apolloProvider: fakeApollo,
+      provide: {
+        fullPath: 'group/project',
+        iid: '1',
+      },
+      propsData: {
+        issuableType,
+      },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+    wrapper = null;
+  });
+
+  describe.each([
+    [IssuableType.Issue, issueReferenceQuery],
+    [IssuableType.MergeRequest, mergeRequestReferenceQuery],
+  ])('when issuableType is %s', (issuableType, referenceQuery) => {
+    it('displays the reference text', async () => {
+      createComponent({
+        issuableType,
+        referenceQuery,
+      });
+
+      await waitForPromises();
+
+      expect(wrapper.text()).toContain(referenceText);
+    });
+
+    it('displays loading icon while fetching and hides clipboard icon', async () => {
+      createComponent({
+        issuableType,
+        referenceQuery,
+      });
+
+      expect(wrapper.find(GlLoadingIcon).exists()).toBe(true);
+      expect(wrapper.find(ClipboardButton).exists()).toBe(false);
+    });
+
+    it('calls createFlash with correct parameters', async () => {
+      const mockError = new Error('mayday');
+
+      createComponent({
+        issuableType,
+        referenceQuery,
+        referenceQueryHandler: jest.fn().mockRejectedValue(mockError),
+      });
+
+      await waitForPromises();
+
+      const [
+        [
+          {
+            message,
+            error: { networkError },
+          },
+        ],
+      ] = wrapper.emitted('fetch-error');
+      expect(message).toBe('An error occurred while fetching reference');
+      expect(networkError).toEqual(mockError);
+    });
+  });
+});