database-test-suites.js

describe('Testing Item model', () => {
  let sampleItemVal;

  beforeEach(() => {
    sampleItemVal = {
      name: 'sample item',
      price: 10,
      rating: '5',
      hash: 'hashGreaterThan10Chars'
    };
  });

  it('it should throw an error due to missing fields', (done) => {
    let item = new Item();

    item.validate((err) => {
      expect(err.errors.name).to.exist;
      expect(err.errors.rating).to.exist;
      expect(err.errors.price).to.exist;
      expect(err.errors.hash).to.exist;

      done();
    });
  });

  it('it should throw an error due to incorrect hash length', (done) => {
    let item = new Item(sampleItemVal);

    item.validate((err) => {
      if (err) {
        expect(err).to.be.instanceOf(ValidationError);
        // this is expected, do not pass err to done()
        done();
      } else {
        const unexpectedSuccessError = new Error('⚠️ Unexpected success!');
        done(unexpectedSuccessError);
      }
    });
  });

  it('it should create the item successfully with correct parameters', (done) => {
    let item = new Item({
      ...sampleItemVal,
      hash: '1234567891'
    });

    item.validate((err) => {
      if (err) {
        const unexpectedFailureError = new Error('⚠️ Unexpected failure!');
        done(unexpectedFailureError);
      } else {
        expect(item.hash).to.equal('1234567891');
        done();
      }
    });
  });
});