test: added unit tests for useUnitsList

Author: aleksandernsilva

apps/meteor/client/components/Omnichannel/hooks/useUnitsList.spec.ts

@@ -0,0 +1,56 @@
+import type { IOmnichannelBusinessUnit, Serialized } from '@rocket.chat/core-typings';
+import { MockedAppRootBuilder } from '@rocket.chat/mock-providers/dist/MockedAppRootBuilder';
+import { act, renderHook, waitFor } from '@testing-library/react';
+
+import { useUnitsList } from './useUnitsList';
+import { createFakeBusinessUnit } from '../../../../tests/mocks/data';
+
+const formatUnitItem = (u: Serialized<IOmnichannelBusinessUnit>) => ({
+	_id: u._id,
+	label: u.name,
+	value: u._id,
+});
+
+const mockGetUnits = jest.fn();
+
+const appRoot = new MockedAppRootBuilder().withEndpoint('GET', '/v1/livechat/units', mockGetUnits);
+
+afterEach(() => {
+	jest.clearAllMocks();
+});
+
+it('should fetch business units', async () => {
+	const limit = 5;
+
+	const data = Array.from({ length: 10 }, () => createFakeBusinessUnit());
+
+	mockGetUnits.mockImplementation(({ offset, count }: { offset: number; count: number }) => {
+		const units = data.slice(offset, offset + count);
+
+		return {
+			units,
+			count,
+			offset,
+			total: data.length,
+		};
+	});
+
+	const { result } = renderHook(() => useUnitsList({ filter: '', limit }), { wrapper: appRoot.build() });
+
+	expect(result.current.isFetching).toBe(true);
+	await waitFor(() => expect(result.current.isFetching).toBe(false));
+
+	expect(mockGetUnits).toHaveBeenCalled();
+	expect(result.current.data).toEqual(data.slice(0, 5).map(formatUnitItem));
+
+	await act(() => result.current.fetchNextPage());
+
+	expect(mockGetUnits).toHaveBeenCalledTimes(2);
+	await waitFor(() => expect(result.current.data).toHaveLength(10));
+	expect(result.current.data).toEqual(data.map(formatUnitItem));
+
+	await act(() => result.current.fetchNextPage());
+
+	// should not fetch again since total was reached
+	expect(mockGetUnits).toHaveBeenCalledTimes(2);
+});

apps/meteor/tests/mocks/data.ts

@@ -13,6 +13,7 @@ import type {
 	Serialized,
 	ILivechatAgent,
 	ILivechatTag,
+	IOmnichannelBusinessUnit,
 } from '@rocket.chat/core-typings';
 import { parse } from '@rocket.chat/message-parser';
 
@@ -375,3 +376,16 @@ export function createFakeTag(overrides?: Partial<Serialized<ILivechatTag>>): Se
 		...overrides,
 	};
 }
+
+export function createFakeBusinessUnit(overrides?: Partial<Serialized<IOmnichannelBusinessUnit>>): Serialized<IOmnichannelBusinessUnit> {
+	return {
+		_id: faker.string.uuid(),
+		name: faker.commerce.department(),
+		visibility: 'public',
+		type: 'u',
+		numMonitors: 1,
+		numDepartments: 1,
+		_updatedAt: new Date().toISOString(),
+		...overrides,
+	};
+}