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school_compare/nextjs-app/__tests__/lib/schoolSections.destinations.test.ts
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import { computeSecondaryFlags, buildSecondaryNavItems } from '@/lib/schoolSections';
import type { School, SchoolDestinations } from '@/lib/types';
const schoolInfo = {
urn: 137083, school_name: 'Northbrook Academy', phase: 'Secondary',
has_sixth_form: true,
} as unknown as School;
const base = { schoolInfo, yearlyData: [], deprivation: null, finance: null };
const phase = (categories = 1) => ({
cohort_year: '2022/23',
groups: {
all: {
cohort: 180,
categories: Array.from({ length: categories }, () => ({
category: 'school_sixth_form' as const,
pupils: 75, percentage: 41.7, status: 'published' as const,
})),
},
},
});
const ks4Only: SchoolDestinations = { ks4: phase(), ks5: null };
const both: SchoolDestinations = { ks4: phase(), ks5: phase() };
describe('computeSecondaryFlags — destinations', () => {
it('flags KS4 destinations when the block carries categories', () => {
const flags = computeSecondaryFlags({ ...base, destinations: ks4Only });
expect(flags.hasKs4Destinations).toBe(true);
expect(flags.hasKs5Destinations).toBe(false);
});
it('flags both phases when both are present', () => {
const flags = computeSecondaryFlags({ ...base, destinations: both });
expect(flags.hasKs4Destinations).toBe(true);
expect(flags.hasKs5Destinations).toBe(true);
});
it('flags neither when the block is absent', () => {
const flags = computeSecondaryFlags({ ...base, destinations: null });
expect(flags.hasKs4Destinations).toBe(false);
expect(flags.hasKs5Destinations).toBe(false);
});
it('does not flag a phase whose groups carry no categories', () => {
const empty: SchoolDestinations = {
ks4: { cohort_year: '2022/23', groups: {} }, ks5: null,
};
expect(computeSecondaryFlags({ ...base, destinations: empty }).hasKs4Destinations)
.toBe(false);
});
it('does not flag a phase whose only group has an empty category list', () => {
const empty: SchoolDestinations = { ks4: phase(0), ks5: null };
expect(computeSecondaryFlags({ ...base, destinations: empty }).hasKs4Destinations)
.toBe(false);
});
});
describe('buildSecondaryNavItems — destinations', () => {
const navInput = {
ofsted: null, admissions: null, admissionDistance: null,
hasLocation: false, yearlyDataLength: 0,
};
it('adds both entries, after GCSEs', () => {
const flags = computeSecondaryFlags({ ...base, destinations: both });
const ids = buildSecondaryNavItems({ ...flags, hasResults: true }, navInput)
.map(i => i.id);
expect(ids).toContain('destinations');
expect(ids).toContain('post16-destinations');
expect(ids.indexOf('destinations')).toBeGreaterThan(ids.indexOf('gcse'));
expect(ids.indexOf('post16-destinations')).toBe(ids.indexOf('destinations') + 1);
});
it('adds no entry for a phase that will not render — the nav must not link to a missing anchor', () => {
const flags = computeSecondaryFlags({ ...base, destinations: null });
const ids = buildSecondaryNavItems(flags, navInput).map(i => i.id);
expect(ids).not.toContain('destinations');
expect(ids).not.toContain('post16-destinations');
});
});