title | category | layout | weight | updated | version |
---|---|---|---|---|---|
Chai.js |
JavaScript libraries |
2017/sheet |
-3 |
2017-08-30 |
chai v4.x |
const { assert } = require('chai')
{: .-setup}
assert(val)
assert.fail(actual, expected)
assert.ok(val) // is truthy
assert.equal(actual, expected) // compare with ==
assert.strictEqual(actual, expected) // compare with ===
assert.deepEqual(actual, expected) // deep equal check
assert.isTrue(val)
assert.isFalse(val)
assert.isNull(val)
assert.isNotNull(val)
assert.isUndefined(val)
assert.isDefined(val)
assert.isFunction(val)
assert.isObject(val)
assert.isArray(val)
assert.isString(val)
assert.isNumber(val)
assert.isBoolean(val)
assert.typeOf(/tea/, 'regexp') // Object.prototype.toString()
assert.instanceOf(chai, Tea)
assert.include([ a,b,c ], a)
assert.match(val, /regexp/)
assert.property(obj, 'tea') // 'tea' in object
assert.deepProperty(obj, 'tea.green')
assert.propertyVal(person, 'name', 'John')
assert.deepPropertyVal(post, 'author.name', 'John')
assert.lengthOf(object, 3)
assert.throws(function() { ... })
assert.throws(function() { ... }, /reference error/)
assert.doesNotThrow
assert.operator(1, '<', 2)
assert.closeTo(actual, expected)
See: Assert API (chaijs.com)
const { expect } = require('chai')
{: .-setup}
expect(object)
.to.equal(expected)
.to.eql(expected) // deep equality
.to.deep.equal(expected) // same as .eql
.to.be.a('string')
.to.include(val)
.be.ok(val)
.be.true
.be.false
.to.exist
.to.be.null
.to.be.undefined
.to.be.empty
.to.be.arguments
.to.be.function
.to.be.instanceOf
.to.be.gt(5) // aka: .above .greaterThan
.to.be.gte(5) // aka: .at.least
.to.be.lt(5) // aka: .below
.to.respondTo('bar')
.to.satisfy((n) => n > 0)
.to.have.members([2, 3, 4])
.to.have.keys(['foo'])
.to.have.key('foo')
expect(() => { ··· })
.to.throw(/not a function/)
See: BDD (chaijs.com)
.to .be .been .is .that .and .have .with .at .of .same
These don't do anything and can be chained.
expect(object).not.equal('x')
global.jQuery = ···
chai.use(require('chai-jquery'))
{: .-setup}
expect($body)
.have.attr('foo')
.have.prop('disabled')
.have.css('background')
.have.css('background-color', '#ffffff')
.have.data('foo')
.have.class('active')
.have.id('id')
.have.html('<em>hi</em>')
.have.text('hello')
.have.value('2013')
expect($body)
.be.visible
.be.hidden
.be.checked
.be.selected
.be.enabled
.be.disabled
.be.empty
.to.exist
.to.contain('text')
.to.have('.selector')