14 July 2017
TIL: How to Correctly Use a Jasmine Spy
by Alex Heflin
At Gaslight we are all about continuously growing and learning, so we’re starting a “Today I Learned Series”! Stay tuned for more tidbits!
I often find myself stumped when trying to use spies in a JavaScript test… Until Today.
TIL: How to correctly use a Jasmine Spy:
Foo = require('foo')
describe 'Foo'
describe 'bar'
it 'does a thing'
spyOn(Foo, 'bar')
foo = new Foo()
expect(foo.bar).toHaveBeenCalled()
Run into no method error? Try spyOn(Foo.prototype, 'bar').
- Jasmine is a popular JavaScript testing framework
- Spies are a type of test double that allow you to stub functions and track the function call, and it’s arguments
For more information on Jasmine Spies, visit their documentation.
Related Posts
Looking to start programming, try this…
John Stamates
Read More →
Cincinnati Javascript: Asynchronous JavaScript Demystified with Kory Smith
Tim Mecklem
Read More →
Faster Tests on your Elixir/Phoenix project and what to do when you get them
Chris Nelson
Read More →
