expect-to-core

Core assertions for expect-to.

Installation

npm install --save-dev expect-to-core

These are included by default in expect-to, e.g.

import expect, { be, deepEqual } from 'expect-to'

Assertions

• be — does a === check

  expect('test').to(be('test'));

• deepEqual — does a deeply equal check using deep-eql

  expect({ foo: 'bar' }).to(deepEqual({ foo: 'bar' }));

• not

  expect('test').to(not(be('testing')));

• beTruthy

  expect('test').to(beTruthy);
  expect(null).to(not(beTruthy));

• beFalsy

  expect('').to(beFalsy);
  expect('foo').to(not(beFalsy));

• exist (i.e. neither null nor undefined)

  expect('test').to(exist);
  expect(null).to(not(exist));

• beEmpty

  expect([]).to(beEmpty);

• contain

  expect([1,2,3]).to(contain(2));

• beInstanceOf

  expect(new Date()).to(beInstanceOf(Date));

• beType

  expect(true).to(beType('boolean'));
  expect('foo').to(beType('string'));

• match

  expect('TeSt').to(match(/test/i));

• throwError

  expect(() => {
    throw new Error()
  }).to(throwError()),
  
  expect(() => {
    throw new Error()
  }).to(throwError(Error)),
  
  expect(() => {
    throw new Error('foo')
  }).to(throwError(Error, 'foo')),
  
  expect(() => {
    throw new Error('foo')
  }).to(throwError('foo')),
  
  expect(() => {
    throw new Error('foo')
  }).to(throwError(/foo/)),