| 1 | expect = require('chai').expect
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| 2 |
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| 3 | Binder = require('binder')
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| 4 | Injector = require('injector')
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| 5 |
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| 6 |
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| 7 | class Parent
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| 8 | name: 'Parent'
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| 9 |
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| 10 | class Child1 extends Parent
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| 11 | name: 'Child1'
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| 12 |
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| 13 | class Child2 extends Parent
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| 14 | name: 'Child2'
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| 15 |
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| 16 | class GrandChild extends Child1
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| 17 | name: 'GrandChild'
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| 18 |
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| 19 | class MySingleton
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| 20 | @scope: 'SINGLETON'
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| 21 |
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| 22 | class MyParamed
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| 23 | constructor: (@name, @age) ->
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| 24 |
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| 25 | describe 'An injector', ->
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| 26 | it 'should create an instance', ->
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| 27 | injector = new Injector()
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| 28 |
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| 29 | instance = injector.getInstance(GrandChild)
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| 30 | expect(instance.name).to.equal 'GrandChild'
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| 31 |
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| 32 | instance = injector.getInstance(Parent)
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| 33 | expect(instance.name).to.equal 'Parent'
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| 34 |
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| 35 | it 'should bail when trying to create an unknown child', ->
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| 36 | injector = new Injector()
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| 37 | create = -> injector.getInstance(666)
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| 38 | expect(create).to.throw /Could not resolve/
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| 39 |
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| 40 | it 'should return the same instance when creating a singleton', ->
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| 41 | injector = new Injector()
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| 42 | inst1 = injector.getInstance(MySingleton)
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| 43 | inst2 = injector.getInstance(MySingleton)
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| 44 |
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| 45 | expect(inst1).to.equal inst2
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| 46 |
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| 47 | it 'should pass constructor args', ->
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| 48 | injector = new Injector()
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| 49 |
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| 50 | unnamed = injector.getInstance(MyParamed)
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| 51 | named = injector.getInstance(MyParamed, 'Frank', 44)
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| 52 |
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| 53 | expect(unnamed.name).to.not.exist
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| 54 | expect(unnamed.age).to.not.exist
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| 55 | expect(named.name).to.equal 'Frank'
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| 56 | expect(named.age).to.equal 44
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| 57 |
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| 58 | it 'should obey a simple singleton binding', ->
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| 59 | class MyBinder extends Binder
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| 60 | configure: ->
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| 61 | @bind(Parent).to(Child2)
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| 62 |
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| 63 | injector = new Injector(new MyBinder())
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| 64 |
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| 65 | expect(injector.getInstance(Child2)).to.be.an.instanceOf Child2
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| 66 | expect(injector.getInstance(Parent)).to.be.an.instanceOf Child2
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| 67 |
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| 68 | it 'should obey a simple instance binding', ->
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| 69 | class MyBinder extends Binder
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| 70 | configure: ->
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| 71 | @bind(Child2).to(GrandChild).inScope('INSTANCE')
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| 72 |
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| 73 | injector = new Injector(new MyBinder())
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| 74 | inst1 = injector.getInstance(Child2)
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| 75 | inst2 = injector.getInstance(Child2)
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| 76 |
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| 77 | expect(inst1).to.be.an.instanceOf GrandChild
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| 78 | expect(inst2).to.be.an.instanceOf GrandChild
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| 79 |
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| 80 | expect(inst1).to.not.equal inst2
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| 81 |
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| 82 | it 'should obey a simple constant binding', ->
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| 83 | class MyBinder extends Binder
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| 84 | configure: ->
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| 85 | @bindConstant('pants').to(666)
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| 86 | injector = new Injector(new MyBinder())
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| 87 | expect(injector.getInstance('pants')).to.equal 666
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| 88 |
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| 89 | it 'should return itself when asking for an injector', ->
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| 90 | injector = new Injector()
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| 91 | injector.someNewField = 3
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| 92 | expect(injector.getInstance(Injector).someNewField).to.equal 3
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