Unit test case for useImageStreams

frontend/src/pages/projects/screens/spawner/__tests__/useImageStreams.spec.ts

@@ -0,0 +1,61 @@
+import { k8sListResourceItems } from '@openshift/dynamic-plugin-sdk-utils';
+import { act } from '@testing-library/react';
+import { mockImageStreamK8sResource } from '~/__mocks__/mockImageStreamK8sResource';
+import { standardUseFetchState, testHook } from '~/__tests__/unit/testUtils/hooks';
+import useImageStreams from '~/pages/projects/screens/spawner/useImageStreams';
+
+jest.mock('@openshift/dynamic-plugin-sdk-utils', () => ({
+  k8sListResourceItems: jest.fn(),
+}));
+
+const k8sListResourceItemsMock = k8sListResourceItems as jest.Mock;
+
+describe('useImageStreams', () => {
+  it('should return notebook image streams', async () => {
+    const mockedImageStreams = { data: mockImageStreamK8sResource({}) };
+    k8sListResourceItemsMock.mockReturnValue(Promise.resolve(mockedImageStreams));
+
+    const renderResult = testHook(useImageStreams)('namespace');
+    expect(k8sListResourceItemsMock).toHaveBeenCalledTimes(1);
+    expect(renderResult).hookToStrictEqual(standardUseFetchState([]));
+    expect(renderResult).hookToHaveUpdateCount(1);
+
+    // wait for update
+    await renderResult.waitForNextUpdate();
+    expect(k8sListResourceItemsMock).toHaveBeenCalledTimes(1);
+    expect(renderResult).hookToStrictEqual(standardUseFetchState(mockedImageStreams, true));
+    expect(renderResult).hookToHaveUpdateCount(2);
+    expect(renderResult).hookToBeStable([false, false, true, true]);
+
+    // refresh
+    k8sListResourceItemsMock.mockReturnValue(Promise.resolve({ data: mockedImageStreams.data }));
+    await act(() => renderResult.result.current[3]());
+    expect(k8sListResourceItemsMock).toHaveBeenCalledTimes(2);
+    expect(renderResult).hookToHaveUpdateCount(3);
+    expect(renderResult).hookToBeStable([false, true, true, true]);
+  });
+
+  it('should handle errors and rethrow', async () => {
+    k8sListResourceItemsMock.mockReturnValue(Promise.reject(new Error('error1')));
+
+    const renderResult = testHook(useImageStreams)('namespace');
+    expect(k8sListResourceItemsMock).toHaveBeenCalledTimes(1);
+    expect(renderResult).hookToStrictEqual(standardUseFetchState([]));
+    expect(renderResult).hookToHaveUpdateCount(1);
+
+    // wait for update
+    await renderResult.waitForNextUpdate();
+    expect(k8sListResourceItemsMock).toHaveBeenCalledTimes(1);
+    expect(renderResult).hookToStrictEqual(standardUseFetchState([], false, new Error('error1')));
+    expect(renderResult).hookToHaveUpdateCount(2);
+    expect(renderResult).hookToBeStable([true, true, false, true]);
+
+    // refresh
+    k8sListResourceItemsMock.mockReturnValue(Promise.reject(new Error('error2')));
+    await act(() => renderResult.result.current[3]());
+    expect(k8sListResourceItemsMock).toHaveBeenCalledTimes(2);
+    expect(renderResult).hookToStrictEqual(standardUseFetchState([], false, new Error('error2')));
+    expect(renderResult).hookToHaveUpdateCount(3);
+    expect(renderResult).hookToBeStable([true, true, false, true]);
+  });
+});