64 lines
2.3 KiB
TypeScript
64 lines
2.3 KiB
TypeScript
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import { getNavigationSource } from '@/lib/analytics';
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/** jsdom's document.referrer is read-only; redefining it is the way in. */
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function referrer(url: string) {
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Object.defineProperty(document, 'referrer', { value: url, configurable: true });
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}
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const ORIGIN = 'http://localhost';
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describe('getNavigationSource', () => {
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afterEach(() => referrer(''));
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it('attributes a visit from a location page to the place layer', () => {
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/*
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* The one this was added for.
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*
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* W2 published ~3,900 location pages whose entire purpose is to funnel
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* search traffic onto school pages. Before this case existed they fell
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* through to 'direct' — so the location layer's contribution was not
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* merely missing from the funnel, it was being counted in the bucket you
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* read as "typed the URL". The measurement that decides whether W2 worked
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* was confidently reporting the wrong answer.
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*/
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referrer(`${ORIGIN}/schools/barnet`);
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expect(getNavigationSource()).toBe('place');
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});
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it.each([
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['/schools/authority/kent', 'authority'],
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['/schools/near/sw11', 'outcode'],
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['/schools/brentwood/primary', 'phase variant'],
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])('covers %s (%s)', (path) => {
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referrer(`${ORIGIN}${path}`);
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expect(getNavigationSource()).toBe('place');
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});
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it('still calls a school page "detail", one character away', () => {
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// /school/ and /schools/ differ by one letter and mean different things.
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// A prefix test written in the wrong order silently merges them.
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referrer(`${ORIGIN}/school/100010-brecknock-primary-school`);
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expect(getNavigationSource()).toBe('detail');
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});
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it.each([
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['/', 'search'],
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['/rankings', 'rankings'],
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['/compare?urns=1,2', 'compare'],
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])('leaves %s attributed as %s', (path, expected) => {
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referrer(`${ORIGIN}${path}`);
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expect(getNavigationSource()).toBe(expected);
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});
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it('treats an external referrer as direct', () => {
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// Umami records the real referrer on the pageview; this field is only
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// about internal navigation.
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referrer('https://www.google.com/search?q=schools+in+barnet');
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expect(getNavigationSource()).toBe('direct');
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});
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it('treats no referrer as direct', () => {
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referrer('');
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expect(getNavigationSource()).toBe('direct');
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});
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});
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