Maryia/BOT-755/test: test case for recent component (deriv-com#10964)

* test: recent component

* fix: improve test-case

* fix: refactor test

* refactor: improve test case

packages/bot-web-ui/src/components/dashboard/dashboard-component/load-bot-preview/__tests__/recent.spec.tsx

@@ -0,0 +1,80 @@
+import React from 'react';
+import { mockStore, StoreProvider } from '@deriv/stores';
+// eslint-disable-next-line import/no-extraneous-dependencies
+import { render, screen } from '@testing-library/react';
+import { mock_ws } from 'Utils/mock';
+import RootStore from 'Stores/root-store';
+import { DBotStoreProvider, mockDBotStore } from 'Stores/useDBotStore';
+import RecentComponent from '../recent';
+
+jest.mock('@deriv/shared', () => ({
+    ...jest.requireActual('@deriv/shared'),
+    isMobile: jest.fn(() => true),
+}));
+
+jest.mock('@deriv/bot-skeleton/src/scratch/blockly', () => jest.fn());
+
+jest.mock('@deriv/bot-skeleton/src/scratch/dbot', () => ({}));
+
+jest.mock('@deriv/bot-skeleton/src/scratch/hooks/block_svg', () => jest.fn());
+
+const dashboard_strategy = {
+    name: '',
+    xml: '',
+    save_type: '',
+    timestamp: 1,
+};
+
+const dashboard_strategies = [
+    { ...dashboard_strategy, name: 'Strategy1', id: '1' },
+    { ...dashboard_strategy, name: 'Strategy2', id: '2' },
+];
+
+describe('RecentComponent', () => {
+    let wrapper: ({ children }: { children: JSX.Element }) => JSX.Element, mock_DBot_store: RootStore | undefined;
+
+    beforeEach(() => {
+        const mock_store = mockStore({});
+        mock_DBot_store = mockDBotStore(mock_store, mock_ws);
+
+        mock_DBot_store?.load_modal.setDashboardStrategies(dashboard_strategies);
+
+        wrapper = ({ children }: { children: JSX.Element }) => (
+            <StoreProvider store={mock_store}>
+                <DBotStoreProvider ws={mock_ws} mock={mock_DBot_store}>
+                    {children}
+                </DBotStoreProvider>
+            </StoreProvider>
+        );
+    });
+
+    it('Should display the list of strategies', () => {
+        render(<RecentComponent />, { wrapper });
+
+        const recent_сomponent = screen.getByText('Your bots:');
+        const strategy_one = screen.getByText('Strategy1');
+        const strategy_two = screen.getByText('Strategy2');
+
+        expect(recent_сomponent).toBeInTheDocument();
+        expect(strategy_one).toBeInTheDocument();
+        expect(strategy_two).toBeInTheDocument();
+    });
+
+    it('Should display text size equal to "xs" when using the mobile version', () => {
+        render(<RecentComponent />, { wrapper });
+
+        const load_strategy_label = screen.getByText('Your bots:');
+
+        expect(load_strategy_label).toBeInTheDocument();
+        expect(load_strategy_label).toHaveStyle('--text-size: var(--text-size-xs)');
+    });
+
+    it('Should not display anything if the list of strategies is empty', () => {
+        mock_DBot_store?.load_modal.setDashboardStrategies([]);
+
+        render(<RecentComponent />, { wrapper });
+
+        const recent_component = screen.queryByText('Your bots:');
+        expect(recent_component).not.toBeInTheDocument();
+    });
+});