school_compare/nextjs-app/__tests__/components/CompareAdmissions.test.tsx

/**
 * Getting a place — phase and school-type correctness (expert sign-off
 * must-fixes M1/M3):
 * - an all-through school's Year 7 round must never render on the primary
 *   tab as if it were Reception odds;
 * - selective schools get entrance-test framing, and the secondary tab
 *   never shows the primaries' distance template.
 */

import { render, screen } from '@testing-library/react';

import { CompareAdmissions } from '@/components/compare/CompareAdmissions';
import type { ComparisonData, School, SchoolAdmissions } from '@/lib/types';

function school(urn: number, name: string, extra: Partial<School> = {}): School {
  return { urn, school_name: name, ...extra } as School;
}

function admissions(partial: Partial<SchoolAdmissions>): SchoolAdmissions {
  return {
    year: 202627,
    school_phase: 'Secondary',
    places_offered: 173,
    total_applications: 433,
    first_preference_offer_pct: 83,
    oversubscribed: true,
    ...partial,
  } as SchoolAdmissions;
}

function entry(info: School, a: SchoolAdmissions | null): ComparisonData {
  return {
    school_info: info,
    yearly_data: [],
    ofsted: null,
    census: null,
    admissions: a,
    admissions_history: a ? [a] : [],
    deprivation: null,
  };
}

describe('CompareAdmissions', () => {
  it("does not show an all-through school's Year 7 round on the primary tab", () => {
    // The real M1 scenario: an all-through school (Year 7 round only) beside
    // a primary with a Reception round.
    const allThrough = school(137306, 'Hessle High and Penshurst Primary');
    const primary = school(138690, 'Barclay Primary School');
    const data = {
      '137306': entry(allThrough, admissions({ school_phase: 'Secondary' })),
      '138690': entry(
        primary,
        admissions({
          school_phase: 'Primary',
          total_applications: 300,
          places_offered: 120,
          first_preference_offer_pct: 96,
        }),
      ),
    };

    render(<CompareAdmissions schools={[allThrough, primary]} data={data} isSecondary={false} />);

    // Hessle's Year 7 figures must not appear…
    expect(screen.queryByText('433')).toBeNull();
    expect(
      screen.getByText(/We don't hold Reception admissions data for this school/),
    ).toBeInTheDocument();
    // …while Barclay's Reception round renders normally.
    expect(screen.getByText('300')).toBeInTheDocument();
  });

  it('phase-labels the section empty state when no matching round exists at all', () => {
    const allThrough = school(137306, 'Hessle High and Penshurst Primary');
    const data = { '137306': entry(allThrough, admissions({ school_phase: 'Secondary' })) };

    render(<CompareAdmissions schools={[allThrough]} data={data} isSecondary={false} />);

    expect(
      screen.getByText(/No Reception admissions data is available for these schools yet/),
    ).toBeInTheDocument();
    expect(screen.queryByText('433')).toBeNull();
  });

  it('shows the Year 7 round on the secondary tab', () => {
    const allThrough = school(137306, 'Hessle High and Penshurst Primary');
    const data = { '137306': entry(allThrough, admissions({ school_phase: 'Secondary' })) };

    render(<CompareAdmissions schools={[allThrough]} data={data} isSecondary={true} />);

    expect(screen.getByText('433')).toBeInTheDocument();
    expect(screen.getByText('173')).toBeInTheDocument();
  });

  it('gives selective schools entrance-test framing, never the distance template', () => {
    const grammar = school(136276, 'Watford Grammar School for Boys', {
      admissions_policy: 'Selective',
      religious_denomination: 'Church of England',
    });
    const data = {
      '136276': entry(grammar, admissions({ first_preference_offer_pct: 43.7 })),
    };

    render(<CompareAdmissions schools={[grammar]} data={data} isSecondary={true} />);

    expect(
      screen.getByText(/Entry is by entrance test\. The school is selective/),
    ).toBeInTheDocument();
    expect(screen.queryByText(/non-faith primaries/)).toBeNull();
  });

  it('secondary faith school gets faith-aware copy, not the primaries template', () => {
    const faithSchool = school(102052, "Bishop Stopford's School", {
      admissions_policy: 'Non-selective',
      religious_denomination: 'Church of England',
    });
    const data = {
      '102052': entry(faithSchool, admissions({ first_preference_offer_pct: 68 })),
    };

    render(<CompareAdmissions schools={[faithSchool]} data={data} isSecondary={true} />);

    expect(screen.getByText(/faith-based criteria may apply/)).toBeInTheDocument();
    expect(screen.queryByText(/non-faith primaries/)).toBeNull();
  });

  it('keeps the reviewed distance copy for oversubscribed non-faith primaries', () => {
    const primary = school(100140, 'Plumcroft Primary School');
    const data = {
      '100140': entry(
        primary,
        admissions({ school_phase: 'Primary', first_preference_offer_pct: 73.4 }),
      ),
    };

    render(<CompareAdmissions schools={[primary]} data={data} isSecondary={false} />);

    expect(screen.getByText(/for most non-faith primaries, distance decides/)).toBeInTheDocument();
  });
});