93 lines
1.3 KiB
Plaintext
93 lines
1.3 KiB
Plaintext
!SLIDE
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# `expect`
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!SLIDE
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# What should we get as an output?
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!SLIDE even-larger
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``` coffeescript
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describe 'Cat', ->
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describe '#meow', ->
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it 'should meow correctly', ->
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expect(cat.meow()).toEqual('meow')
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```
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!SLIDE
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# Wait, we need a cat.
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!SLIDE even-larger
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``` coffeescript
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describe 'Cat', ->
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describe '#meow', ->
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it 'should meow correctly', ->
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cat = new Cat()
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expect(cat.meow()).toEqual('meow')
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```
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!SLIDE even-larger
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``` coffeescript
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# code-under-test
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class this.Cat
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meow: ->
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```
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!SLIDE larger
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``` javascript
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// safety wrapper to prevent global pollution
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(function() {
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// ...but we want to pollute the Cat class
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this.Cat = (function() {
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function Cat() {}
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Cat.prototype.meow = function() {};
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return Cat;
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})();
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})(this) // this is window in a browser
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```
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!SLIDE
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# Run it!
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!SLIDE even-larger
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```
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1 spec, 1 failure
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Expected undefined to equal 'meow'.
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```
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!SLIDE
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# Make it meow!
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!SLIDE even-larger
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``` coffeescript
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class this.Cat
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meow: -> "meow"
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```
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!SLIDE even-larger
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```
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1 spec, 0 failures
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```
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!SLIDE
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# Here's what you should have meow...
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!SLIDE even-larger
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``` coffeescript
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# spec
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describe 'Cat', ->
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describe '#meow', ->
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it 'should meow correctly', ->
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expect(cat.meow()).toEqual('meow')
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```
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!SLIDE even-larger
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``` coffeescript
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# code-under-test
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class this.Cat
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meow: -> "meow"
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```
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