Jasmine Cheat Sheet

References

• Also see the Jest cheatsheet. Jest uses Jasmine and therefore has a similar API.
• https://jasmine.github.io
• Jasmine Cheat Sheet

[Tests] Event spies

spyOnEvent($('#some_element'), 'click')
$('#some_element').click()
expect('click').toHaveBeenPreventedOn($('#some_element'))
expect('click').toHaveBeenTriggeredOn($('#some_element'))

[Tests] HTML runner

var jasmineEnv = jasmine.getEnv()
jasmineEnv.updateInterval = 250

var htmlReporter = new jasmine.HtmlReporter()
jasmineEnv.addReporter(htmlReporter)

$(function() { jasmineEnv.execute() })

Jasmine jQuery

[Tests] Async

test('works with promises', () => {
  return new Promise((resolve, reject) => {
    ···
  })
})

Make your test return a promise.

[Tests] Creating spies

stub = jasmine.createSpy('stub')
stub('hello')

expect(stub.identity).toEqual('stub')
expect(stub).toHaveBeenCalled()

[Tests] Spies

spyOn(foo, 'setBar')
spyOn(foo, 'setBar').andReturn(123)
spyOn(foo, 'getBar').andCallFake(function() { return 1001; })
foo.setBar(123)

expect(foo.setBar).toHaveBeenCalled()
expect(foo.setBar).toHaveBeenCalledWith(123)
expect(foo.setBar.calls.length).toEqual(2)
expect(foo.setBar.calls[0].args[0]).toEqual(123)

[Tests] Pending

xit('this is a pending test', () => {
  ···
})

xdescribe('this is a pending block', () => {
  ···
})

[Tests] Hooks

beforeEach(() => {
  ···
})

afterEach(() => {
  ···
})

[Tests] Expectations

expect(true).toBe(true)
expect(true).not.toBe(true)

expect(a).toEqual(bar)

expect(message).toMatch(/bar/)
expect(message).toMatch('bar')

expect(a.foo).toBeDefined()
expect(a.foo).toBeUndefined()
expect(a.foo).toBeNull()

expect(a.foo).toBeTruthy()
expect(a.foo).toBeFalsy()

expect(message).toContain('hello')

expect(pi).toBeGreaterThan(3)
expect(pi).toBeLessThan(4)
expect(pi).toBeCloseTo(3.1415, 0.1)

expect(func).toThrow()

[Tests] Writing tests

describe('A suite', () => {
  it('works', () => {
    expect(true).toBe(true)
  })
})