Improved NavPills component and added test

src/settings/Settings.tsx

@@ -1,7 +1,7 @@
 import { FC, ReactNode } from 'react';
 import { Navigate, Routes, Route } from 'react-router-dom';
 import { NoMenuLayout } from '../common/NoMenuLayout';
-import { NavPills } from '../utils/NavPills';
+import { NavPillItem, NavPills } from '../utils/NavPills';
 
 const SettingsSections: FC<{ items: ReactNode[] }> = ({ items }) => (
   <>
@@ -18,13 +18,11 @@ const Settings = (
   Tags: FC,
 ) => () => (
   <NoMenuLayout>
-    <NavPills
-      items={[
-        { to: 'app', children: 'App' },
-        { to: 'short-urls', children: 'Short URLs' },
-        { to: 'others', children: 'Others' },
-      ]}
-    />
+    <NavPills>
+      <NavPillItem to="app">App</NavPillItem>
+      <NavPillItem to="short-urls">Short URLs</NavPillItem>
+      <NavPillItem to="others">Others</NavPillItem>
+    </NavPills>
 
     <Routes>
       <Route path="app" element={<SettingsSections items={[ <UserInterface key="one" />, <RealTimeUpdates key="two" /> ]} />} />

src/utils/NavPills.tsx

@@ -1,17 +1,29 @@
-import { FC, ReactNode } from 'react';
+import { FC, Children, isValidElement } from 'react';
 import { Card, Nav, NavLink } from 'reactstrap';
 import { NavLink as RouterNavLink } from 'react-router-dom';
 import './NavPills.scss';
 
-interface NavPillsProps {
-  items: { children: ReactNode; to: string; replace?: boolean }[];
+interface NavPillProps {
+  to: string;
+  replace?: boolean;
 }
 
-export const NavPills: FC<NavPillsProps> = ({ items }) => (
+export const NavPillItem: FC<NavPillProps> = ({ children, ...rest }) => (
+  <NavLink className="nav-pills__nav-link" tag={RouterNavLink} {...rest}>
+    {children}
+  </NavLink>
+);
+
+export const NavPills: FC = ({ children }) => (
   <Card className="nav-pills__nav p-0 overflow-hidden mb-3" body>
     <Nav pills fill>
-      {items.map(({ children, ...rest }, index) =>
-        <NavLink key={index} className="nav-pills__nav-link" tag={RouterNavLink} {...rest}>{children}</NavLink>)}
+      {Children.map(children, (child) => {
+        if (!isValidElement(child) || child.type !== NavPillItem) {
+          throw new Error('Only NavPillItem children are allowed inside NavPills.');
+        }
+
+        return child;
+      })}
     </Nav>
   </Card>
 );

src/visits/VisitsStats.tsx

@@ -15,7 +15,7 @@ import { Settings } from '../settings/reducers/settings';
 import { SelectedServer } from '../servers/data';
 import { supportsBotVisits } from '../utils/helpers/features';
 import { prettify } from '../utils/helpers/numbers';
-import { NavPills } from '../utils/NavPills';
+import { NavPillItem, NavPills } from '../utils/NavPills';
 import LineChartCard from './charts/LineChartCard';
 import VisitsTable from './VisitsTable';
 import { NormalizedOrphanVisit, NormalizedVisit, VisitsFilter, VisitsInfo, VisitsParams } from './types';
@@ -143,18 +143,14 @@ const VisitsStats: FC<VisitsStatsProps> = ({
 
     return (
       <>
-        <NavPills
-          items={Object.values(sections).map(({ title, icon, subPath }) => ({
-            replace: true,
-            to: buildSectionUrl(subPath),
-            children: (
-              <>
-                <FontAwesomeIcon icon={icon} />
-                <span className="ml-2 d-none d-sm-inline">{title}</span>
-              </>
-            ),
-          }))}
-        />
+        <NavPills>
+          {Object.values(sections).map(({ title, icon, subPath }, index) => (
+            <NavPillItem key={index} to={buildSectionUrl(subPath)} replace>
+              <FontAwesomeIcon icon={icon} />
+              <span className="ml-2 d-none d-sm-inline">{title}</span>
+            </NavPillItem>
+          ))}
+        </NavPills>
         <Row>
           <Routes>
             <Route

test/utils/NavPills.test.tsx

@@ -0,0 +1,37 @@
+import { shallow } from 'enzyme';
+import { Card, Nav } from 'reactstrap';
+import { NavPillItem, NavPills } from '../../src/utils/NavPills';
+
+describe('<NavPills />', () => {
+  it.each([
+    [ 'Foo' ],
+    [ <span key="1">Hi!</span> ],
+    [[ <NavPillItem key="1" to="" />, <span key="2">Hi!</span> ]],
+  ])('throws error when any of the children is not a NavPillItem', (children) => {
+    expect.assertions(1);
+
+    try {
+      shallow(<NavPills>{children}</NavPills>);
+    } catch (e: any) {
+      expect(e.message).toEqual('Only NavPillItem children are allowed inside NavPills.');
+    }
+  });
+
+  it('renders provided items', () => {
+    const wrapper = shallow(
+      <NavPills>
+        <NavPillItem to="1">1</NavPillItem>
+        <NavPillItem to="2">2</NavPillItem>
+        <NavPillItem to="3">3</NavPillItem>
+      </NavPills>,
+    );
+    const card = wrapper.find(Card);
+    const nav = wrapper.find(Nav);
+
+    expect(card).toHaveLength(1);
+    expect(card.prop('body')).toEqual(true);
+    expect(nav).toHaveLength(1);
+    expect(nav.prop('pills')).toEqual(true);
+    expect(nav.prop('fill')).toEqual(true);
+  });
+});