describe('Date Format Utilities', () => {
it('should format dates correctly', () => {
const today = new Date();
const yesterday = new Date(today);
yesterday.setDate(yesterday.getDate() - 1);
const formatDate = (date: Date): string => {
return date.toISOString().split('T')[0];
};
expect(formatDate(today)).toMatch(/^\d{4}-\d{2}-\d{2}$/);
expect(formatDate(yesterday)).toMatch(/^\d{4}-\d{2}-\d{2}$/);
// Test that yesterday is actually one day before today
const todayFormatted = formatDate(today);
const yesterdayFormatted = formatDate(yesterday);
const todayTime = new Date(todayFormatted).getTime();
const yesterdayTime = new Date(yesterdayFormatted).getTime();
expect(todayTime - yesterdayTime).toBe(24 * 60 * 60 * 1000); // 24 hours in milliseconds
});
it('should handle different date ranges', () => {
const daysAgo = (days: number): string => {
const date = new Date();
date.setDate(date.getDate() - days);
return date.toISOString().split('T')[0];
};
expect(daysAgo(0)).toMatch(/^\d{4}-\d{2}-\d{2}$/);
expect(daysAgo(7)).toMatch(/^\d{4}-\d{2}-\d{2}$/);
expect(daysAgo(30)).toMatch(/^\d{4}-\d{2}-\d{2}$/);
});
it('should calculate date differences correctly', () => {
const startDate = new Date('2024-01-01');
const endDate = new Date('2024-01-08');
const diffInMs = endDate.getTime() - startDate.getTime();
const diffInDays = Math.ceil(diffInMs / (1000 * 60 * 60 * 24));
expect(diffInDays).toBe(7);
});
});
describe('Environment Variables', () => {
it('should handle missing environment variables gracefully', () => {
const getEnvVar = (name: string, defaultValue: string | null = null): string | null => {
return process.env[name] || defaultValue;
};
expect(getEnvVar('NONEXISTENT_VAR')).toBeNull();
expect(getEnvVar('NONEXISTENT_VAR', 'default')).toBe('default');
});
it('should validate environment variable format', () => {
const validateEmail = (email: string): boolean => {
const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
return emailRegex.test(email);
};
expect(validateEmail('test@example.com')).toBe(true);
expect(validateEmail('invalid-email')).toBe(false);
expect(validateEmail('')).toBe(false);
});
it('should validate boolean environment variables', () => {
const parseBooleanEnv = (value: string | undefined): boolean => {
if (!value) return false;
return value.toLowerCase() === 'true' || value === '1';
};
expect(parseBooleanEnv('true')).toBe(true);
expect(parseBooleanEnv('TRUE')).toBe(true);
expect(parseBooleanEnv('1')).toBe(true);
expect(parseBooleanEnv('false')).toBe(false);
expect(parseBooleanEnv('0')).toBe(false);
expect(parseBooleanEnv(undefined)).toBe(false);
});
});
