tests.js

// Property-based test
describe('properties', () => {
  it('is a bijection', () => {
    fc.assert(fc.property(
      fc.integer(1, Number.MAX_SAFE_INTEGER),
      seed => decode(encode(seed)) === seed
    ))
  });
})


// Example-based test
describe('record locator module', () => {
  it('should encode integers into record locator strings', () => {
    recordLocator.encode(270600).should.equal('AAAA');
    recordLocator.encode(1048575).should.equal('ZZZZ');
    recordLocator.encode(345560).should.equal('DKHR');
  });
})