const { parseStoreNumber } = require('../utils/validate');

describe('parseStoreNumber', () => {
  it('extracts a simple store number', () => {
    expect(parseStoreNumber('store 782')).toBe('782');
    expect(parseStoreNumber('analyze 305')).toBe('305');
  });

  it('handles numbers with surrounding text', () => {
    expect(parseStoreNumber('please analyze store 1234 now')).toBe('1234');
  });

  it('returns null for invalid input', () => {
    expect(parseStoreNumber(null)).toBeNull();
    expect(parseStoreNumber('')).toBeNull();
    expect(parseStoreNumber('store abc')).toBeNull();
    expect(parseStoreNumber('store 0')).toBeNull();
    expect(parseStoreNumber('store -42')).toBeNull();
  });

  it('ignores numbers that are too long', () => {
    expect(parseStoreNumber('store 12345678901')).toBeNull(); // 11 digits
  });

  it('normalizes by removing leading zeros in result (via parseInt)', () => {
    expect(parseStoreNumber('store 00042')).toBe('42');
  });
});