Fix error thrown on overview page

public/pages/TopNQueries/TopNQueries.test.tsx

@@ -0,0 +1,208 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import React from 'react';
+import { render, screen, fireEvent, waitFor } from '@testing-library/react';
+import '@testing-library/jest-dom/extend-expect';
+import { MemoryRouter } from 'react-router-dom';
+import TopNQueries, { QUERY_INSIGHTS, CONFIGURATION } from './TopNQueries';
+import { CoreStart } from 'opensearch-dashboards/public';
+
+jest.mock('../QueryInsights/QueryInsights', () => () => <div>Mocked QueryInsights</div>);
+jest.mock('../Configuration/Configuration', () => () => <div>Mocked Configuration</div>);
+jest.mock('../QueryDetails/QueryDetails', () => () => <div>Mocked QueryDetails</div>);
+
+const mockCore = ({
+  http: {
+    get: jest.fn(),
+    put: jest.fn(),
+  },
+} as unknown) as CoreStart;
+
+const setUpDefaultEnabledSettings = () => {
+  const mockLatencyResponse = { response: { top_queries: [{ id: '1' }, { id: '2' }] } };
+  const mockCpuResponse = { response: { top_queries: [{ id: '2' }, { id: '3' }] } };
+  const mockMemoryResponse = { response: { top_queries: [{ id: '1' }] } };
+  // Mock API responses for each metric
+  (mockCore.http.get as jest.Mock).mockImplementation((endpoint) => {
+    if (endpoint === '/api/top_queries/latency') return Promise.resolve(mockLatencyResponse);
+    if (endpoint === '/api/top_queries/cpu') return Promise.resolve(mockCpuResponse);
+    if (endpoint === '/api/top_queries/memory') return Promise.resolve(mockMemoryResponse);
+    return Promise.resolve({ response: { top_queries: [] } });
+  });
+  // Mock API response for all metrics enabled
+  const mockSettingsResponse = {
+    response: {
+      persistent: {
+        search: {
+          insights: {
+            top_queries: {
+              latency: { enabled: 'true', top_n_size: '10', window_size: '1h' },
+              cpu: { enabled: 'true', top_n_size: '10', window_size: '1h' },
+              memory: { enabled: 'true', top_n_size: '5', window_size: '30m' },
+            },
+          },
+        },
+      },
+    },
+  };
+  (mockCore.http.get as jest.Mock).mockResolvedValueOnce(mockSettingsResponse);
+};
+
+describe('TopNQueries Component', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('renders and switches tabs correctly', () => {
+    render(
+      <MemoryRouter initialEntries={[QUERY_INSIGHTS]}>
+        <TopNQueries core={mockCore} />
+      </MemoryRouter>
+    );
+
+    // Check for Query Insights tab content
+    expect(screen.getByText('Mocked QueryInsights')).toBeInTheDocument();
+    expect(screen.getByText('Top N queries')).toBeInTheDocument();
+    expect(screen.getByText('Configuration')).toBeInTheDocument();
+
+    // Switch to Configuration tab
+    fireEvent.click(screen.getByText('Configuration'));
+    expect(screen.getByText('Mocked Configuration')).toBeInTheDocument();
+  });
+
+  it('updates settings in retrieveConfigInfo based on API response', async () => {
+    const mockSettingsResponse = {
+      response: {
+        persistent: {
+          search: {
+            insights: {
+              top_queries: {
+                latency: { enabled: 'true', top_n_size: '10', window_size: '1h' },
+                cpu: { enabled: 'false' },
+                memory: { enabled: 'true', top_n_size: '5', window_size: '30m' },
+              },
+            },
+          },
+        },
+      },
+    };
+    (mockCore.http.get as jest.Mock).mockResolvedValueOnce(mockSettingsResponse);
+    render(
+      <MemoryRouter initialEntries={[CONFIGURATION]}>
+        <TopNQueries core={mockCore} />
+      </MemoryRouter>
+    );
+    await waitFor(() => {
+      expect(mockCore.http.get).toHaveBeenCalledWith('/api/settings');
+      expect(screen.getByText('Mocked Configuration')).toBeInTheDocument();
+    });
+  });
+
+  it('fetches queries for all metrics in retrieveQueries', async () => {
+    setUpDefaultEnabledSettings();
+    render(
+      <MemoryRouter initialEntries={[QUERY_INSIGHTS]}>
+        <TopNQueries core={mockCore} />
+      </MemoryRouter>
+    );
+    await waitFor(() => {
+      // Verify each endpoint is called
+      expect(mockCore.http.get).toHaveBeenCalledWith('/api/settings');
+      expect(mockCore.http.get).toHaveBeenCalledWith(
+        '/api/top_queries/latency',
+        expect.any(Object)
+      );
+      expect(mockCore.http.get).toHaveBeenCalledWith('/api/top_queries/cpu', expect.any(Object));
+      expect(mockCore.http.get).toHaveBeenCalledWith('/api/top_queries/memory', expect.any(Object));
+      // Check that deduplicated queries would be displayed in QueryInsights
+      expect(screen.getByText('Mocked QueryInsights')).toBeInTheDocument();
+    });
+  });
+
+  it('fetches queries for only enabled metrics in retrieveQueries', async () => {
+    const mockResponse = { response: { top_queries: [{ id: '1' }, { id: '2' }] } };
+    // Mock API responses for each metric
+    (mockCore.http.get as jest.Mock).mockImplementation((endpoint) => {
+      if (endpoint === '/api/top_queries/latency') return Promise.resolve(mockResponse);
+      if (endpoint === '/api/top_queries/cpu') return Promise.resolve(mockResponse);
+      if (endpoint === '/api/top_queries/memory') return Promise.resolve(mockResponse);
+      return Promise.resolve({ response: { top_queries: [] } });
+    });
+    // Mock API response for only one metrics enabled
+    const mockSettingsResponse = {
+      response: {
+        persistent: {
+          search: {
+            insights: {
+              top_queries: {
+                latency: { enabled: 'true', top_n_size: '10', window_size: '1h' },
+                cpu: { enabled: 'false' },
+                memory: { enabled: 'false' },
+              },
+            },
+          },
+        },
+      },
+    };
+    (mockCore.http.get as jest.Mock).mockResolvedValueOnce(mockSettingsResponse);
+    render(
+      <MemoryRouter initialEntries={[QUERY_INSIGHTS]}>
+        <TopNQueries core={mockCore} />
+      </MemoryRouter>
+    );
+    await waitFor(() => {
+      // Verify each endpoint is called
+      expect(mockCore.http.get).toHaveBeenCalledWith('/api/settings');
+      expect(mockCore.http.get).toHaveBeenCalledWith(
+        '/api/top_queries/latency',
+        expect.any(Object)
+      );
+      expect(mockCore.http.get).not.toHaveBeenCalledWith(
+        '/api/top_queries/cpu',
+        expect.any(Object)
+      );
+      expect(mockCore.http.get).not.toHaveBeenCalledWith(
+        '/api/top_queries/memory',
+        expect.any(Object)
+      );
+      // Check that deduplicated queries would be displayed in QueryInsights
+      expect(screen.getByText('Mocked QueryInsights')).toBeInTheDocument();
+    });
+  });
+
+  it('updates time range and fetches data when time range changes', async () => {
+    setUpDefaultEnabledSettings();
+    (mockCore.http.get as jest.Mock).mockResolvedValueOnce({ response: { top_queries: [] } });
+    // Render with initial time range
+    const { rerender } = render(
+      <MemoryRouter initialEntries={[QUERY_INSIGHTS]}>
+        <TopNQueries core={mockCore} initialStart="now-1d" initialEnd="now" />
+      </MemoryRouter>
+    );
+    // Mock a new response for the time range update
+    (mockCore.http.get as jest.Mock).mockResolvedValueOnce({
+      response: { top_queries: [{ id: 'newQuery' }] },
+    });
+    // Re-render with updated time range to simulate a change
+    rerender(
+      <MemoryRouter initialEntries={[QUERY_INSIGHTS]}>
+        <TopNQueries core={mockCore} initialStart="now-7d" initialEnd="now" />
+      </MemoryRouter>
+    );
+    // Verify that the component re-fetches data for the new time range
+    await waitFor(() => {
+      // 1 initial call for settings, 3 each for the initial rendering and re-rendering
+      expect(mockCore.http.get).toHaveBeenCalledTimes(7);
+      expect(mockCore.http.get).toHaveBeenCalledWith('/api/settings');
+      expect(mockCore.http.get).toHaveBeenCalledWith(
+        '/api/top_queries/latency',
+        expect.any(Object)
+      );
+      expect(mockCore.http.get).toHaveBeenCalledWith('/api/top_queries/cpu', expect.any(Object));
+      expect(mockCore.http.get).toHaveBeenCalledWith('/api/top_queries/memory', expect.any(Object));
+    });
+  });
+});

public/pages/TopNQueries/TopNQueries.tsx

@@ -23,12 +23,20 @@ export interface MetricSettings {
   currTimeUnit: string;
 }
 
-const TopNQueries = ({ core }: { core: CoreStart }) => {
+const TopNQueries = ({
+  core,
+  initialStart = 'now-1d',
+  initialEnd = 'now',
+}: {
+  core: CoreStart;
+  initialStart?: string;
+  initialEnd?: string;
+}) => {
   const history = useHistory();
   const location = useLocation();
   const [loading, setLoading] = useState(false);
-  const [currStart, setStart] = useState('now-1d');
-  const [currEnd, setEnd] = useState('now');
+  const [currStart, setStart] = useState(initialStart);
+  const [currEnd, setEnd] = useState(initialEnd);
   const [recentlyUsedRanges, setRecentlyUsedRanges] = useState([
     { start: currStart, end: currEnd },
   ]);
@@ -172,10 +180,8 @@ const TopNQueries = ({ core }: { core: CoreStart }) => {
       if (get) {
         try {
           const resp = await core.http.get('/api/settings');
-          const settings = resp.response.persistent.search.insights.top_queries;
-          const latency = settings.latency;
-          const cpu = settings.cpu;
-          const memory = settings.memory;
+          const { latency, cpu, memory } =
+            resp?.response?.persistent?.search?.insights?.top_queries || {};
           if (latency !== undefined && latency.enabled === 'true') {
             const [time, timeUnits] = latency.window_size.match(/\D+|\d+/g);
             setMetricSettings('latency', {