ff7f5487e6
- Migrate from vanilla JavaScript SPA to Next.js 16 with App Router - Add server-side rendering for all pages (Home, Compare, Rankings) - Create individual school pages with dynamic routing (/school/[urn]) - Implement Chart.js and Leaflet map integrations - Add comprehensive SEO with sitemap, robots.txt, and JSON-LD - Set up Docker multi-service architecture (PostgreSQL, FastAPI, Next.js) - Update CI/CD pipeline to build both backend and frontend images - Fix Dockerfile to include devDependencies for TypeScript compilation - Add Jest testing configuration - Implement performance optimizations (code splitting, caching) Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
105 lines
2.5 KiB
TypeScript
105 lines
2.5 KiB
TypeScript
/**
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* Utility Functions Tests
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*/
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import {
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formatPercentage,
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formatProgress,
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calculateTrend,
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isValidPostcode,
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debounce,
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} from '@/lib/utils';
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describe('formatPercentage', () => {
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it('formats percentages correctly', () => {
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expect(formatPercentage(75.5)).toBe('75.5%');
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expect(formatPercentage(100)).toBe('100.0%');
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expect(formatPercentage(0)).toBe('0.0%');
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});
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it('handles null values', () => {
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expect(formatPercentage(null)).toBe('-');
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});
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});
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describe('formatProgress', () => {
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it('formats progress scores correctly', () => {
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expect(formatProgress(2.5)).toBe('+2.5');
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expect(formatProgress(-1.3)).toBe('-1.3');
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expect(formatProgress(0)).toBe('0.0');
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});
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it('handles null values', () => {
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expect(formatProgress(null)).toBe('-');
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});
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});
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describe('calculateTrend', () => {
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it('calculates upward trend', () => {
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expect(calculateTrend(75, 70)).toBe('up');
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});
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it('calculates downward trend', () => {
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expect(calculateTrend(70, 75)).toBe('down');
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});
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it('calculates same trend', () => {
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expect(calculateTrend(75, 75)).toBe('same');
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});
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it('handles null previous value', () => {
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expect(calculateTrend(75, null)).toBe('same');
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});
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it('handles null current value', () => {
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expect(calculateTrend(null, 75)).toBe('same');
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});
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});
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describe('isValidPostcode', () => {
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it('validates correct UK postcodes', () => {
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expect(isValidPostcode('SW1A 1AA')).toBe(true);
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expect(isValidPostcode('M1 1AE')).toBe(true);
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expect(isValidPostcode('B33 8TH')).toBe(true);
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});
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it('rejects invalid postcodes', () => {
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expect(isValidPostcode('INVALID')).toBe(false);
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expect(isValidPostcode('12345')).toBe(false);
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expect(isValidPostcode('')).toBe(false);
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});
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});
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describe('debounce', () => {
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jest.useFakeTimers();
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it('delays function execution', () => {
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const mockFn = jest.fn();
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const debouncedFn = debounce(mockFn, 300);
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debouncedFn('test');
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expect(mockFn).not.toHaveBeenCalled();
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jest.advanceTimersByTime(300);
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expect(mockFn).toHaveBeenCalledWith('test');
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expect(mockFn).toHaveBeenCalledTimes(1);
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});
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it('cancels previous calls', () => {
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const mockFn = jest.fn();
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const debouncedFn = debounce(mockFn, 300);
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debouncedFn('first');
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jest.advanceTimersByTime(150);
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debouncedFn('second');
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jest.advanceTimersByTime(150);
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debouncedFn('third');
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jest.advanceTimersByTime(300);
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expect(mockFn).toHaveBeenCalledWith('third');
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expect(mockFn).toHaveBeenCalledTimes(1);
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});
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jest.useRealTimers();
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});
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