stalniy

sharedExampleFor('Range validator', function(fieldName, min, max) {
  it('rejects values greater than "max" value', function() {
    $subject[fieldName] = max() + 1;
    expect($subject.hasErrorOn(fieldName)).to.be.true;
  });
  
  it('rejects values less than "min" value', function() {
    $subject[fieldName] = min() - 1;
    expect($subject.hasErrorOn(fieldName)).to.be.true;
  });

stalniy

function itBehavesLike(type) {
  var args = arguments;
  
  describe('behaves like "' + type + '"', function() {
    includeExamplesFor.apply(this, args);
  });
}

stalniy

describe('Array', function() {
  subject(function() {
    return [];
  });
  
  includeExamplesFor('Collection');
});

describe('Set', function() {
  subject(function() {

stalniy

sharedExamplesFor('Collection', function() {
  it('is empty by default', function() {
    expect($subject).to.be.empty;
  });
  
  it('increments "length" property when adds a new item', function() {
    $subject.add(1, 2, 3);
    expect($subject).to.have.length(3);
  });
  

stalniy

describe('Article', function() {
  subject(function() {
    return Article.create({ title: 'BDD lazy vars' });
  });
  
  its('status', () => is.expected.to.equal('draft'));
  
  describe('changes history', function() {
    subject(function() {
      return $subject.changes(); // $subject refers to parent subject, i.e. created article

stalniy

describe('Article', function() {
  subject(function() {
    return Article.create({ title: 'BDD lazy vars' });
  });
  
  its('status', () => is.expected.to.equal('draft'));
  
  // or even better
  it(() => is.expected.to.be.a.draft);
});

stalniy

describe('Article', function() {
  subject(function() {
    return Article.create({ title: 'BDD lazy vars' });
  });
  
  it('is created as a draft by default', function() {
    expect($subject.status).to.equal('draft');
  });
});

stalniy

describe('Article', function() {
  def('article', function() {
    return new Article({ type: 'news', });
  });
  
  before(function() {
    article.id = 1; // first instance
  });
  
  before(function() {

stalniy

describe('Invoice', function() {
  def('user', function() {
    return User.create({ role: 'member' });
  });
  
  def('invoice', function() {
    return $user.invoices.create({ price: 10, currency: 'USD' });
  });
  
  describe('by default', function() {

stalniy

describe('Invoice', function() {
  var invoice, user;
  
  describe('by default', function() {
    beforeEach(function() {
      user = User.create({ role: 'member' });
      invoice = user.invoices.create({ price: 10, currency: 'USD' });
    });
    
    it('has status "fraud" if amount does not equal to invoice amount', function() {