1 files changed, 106 insertions, 0 deletions
diff --git a/spec/frontend/pipelines/components/jobs/jobs_app_spec.js b/spec/frontend/pipelines/components/jobs/jobs_app_spec.js
new file mode 100644
index 00000000000..1ea6096c922
--- /dev/null
+++ b/spec/frontend/pipelines/components/jobs/jobs_app_spec.js
@@ -0,0 +1,106 @@
+import { GlIntersectionObserver, GlSkeletonLoader } from '@gitlab/ui';
+import { createLocalVue, shallowMount } from '@vue/test-utils';
+import VueApollo from 'vue-apollo';
+import createMockApollo from 'helpers/mock_apollo_helper';
+import waitForPromises from 'helpers/wait_for_promises';
+import createFlash from '~/flash';
+import JobsApp from '~/pipelines/components/jobs/jobs_app.vue';
+import JobsTable from '~/jobs/components/table/jobs_table.vue';
+import getPipelineJobsQuery from '~/pipelines/graphql/queries/get_pipeline_jobs.query.graphql';
+import { mockPipelineJobsQueryResponse } from '../../mock_data';
+
+const localVue = createLocalVue();
+localVue.use(VueApollo);
+
+jest.mock('~/flash');
+
+describe('Jobs app', () => {
+  let wrapper;
+  let resolverSpy;
+
+  const findSkeletonLoader = () => wrapper.findComponent(GlSkeletonLoader);
+  const findJobsTable = () => wrapper.findComponent(JobsTable);
+
+  const triggerInfiniteScroll = () =>
+    wrapper.findComponent(GlIntersectionObserver).vm.$emit('appear');
+
+  const createMockApolloProvider = (resolver) => {
+    const requestHandlers = [[getPipelineJobsQuery, resolver]];
+
+    return createMockApollo(requestHandlers);
+  };
+
+  const createComponent = (resolver) => {
+    wrapper = shallowMount(JobsApp, {
+      provide: {
+        fullPath: 'root/ci-project',
+        pipelineIid: 1,
+      },
+      localVue,
+      apolloProvider: createMockApolloProvider(resolver),
+    });
+  };
+
+  beforeEach(() => {
+    resolverSpy = jest.fn().mockResolvedValue(mockPipelineJobsQueryResponse);
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  it('displays the loading state', () => {
+    createComponent(resolverSpy);
+
+    expect(findSkeletonLoader().exists()).toBe(true);
+    expect(findJobsTable().exists()).toBe(false);
+  });
+
+  it('displays the jobs table', async () => {
+    createComponent(resolverSpy);
+
+    await waitForPromises();
+
+    expect(findJobsTable().exists()).toBe(true);
+    expect(findSkeletonLoader().exists()).toBe(false);
+    expect(createFlash).not.toHaveBeenCalled();
+  });
+
+  it('handles job fetch error correctly', async () => {
+    resolverSpy = jest.fn().mockRejectedValue(new Error('GraphQL error'));
+
+    createComponent(resolverSpy);
+
+    await waitForPromises();
+
+    expect(createFlash).toHaveBeenCalledWith({
+      message: 'An error occured while fetching the pipelines jobs.',
+    });
+  });
+
+  it('handles infinite scrolling by calling fetchMore', async () => {
+    createComponent(resolverSpy);
+
+    await waitForPromises();
+
+    triggerInfiniteScroll();
+
+    expect(resolverSpy).toHaveBeenCalledWith({
+      after: 'eyJpZCI6Ijg0NyJ9',
+      fullPath: 'root/ci-project',
+      iid: 1,
+    });
+  });
+
+  it('does not display main loading state again after fetchMore', async () => {
+    createComponent(resolverSpy);
+
+    expect(findSkeletonLoader().exists()).toBe(true);
+
+    await waitForPromises();
+
+    triggerInfiniteScroll();
+
+    expect(findSkeletonLoader().exists()).toBe(false);
+  });
+});