37 lines
1.3 KiB
Lua
37 lines
1.3 KiB
Lua
describe('find', function()
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it('produces an error if its parent errors', function()
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local observable = Rx.Observable.fromValue(''):map(function(x) return x() end)
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expect(observable.subscribe).to.fail()
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expect(observable:find().subscribe).to.fail()
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end)
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it('uses the identity function as a predicate if none is specified', function()
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local observable = Rx.Observable.fromTable({false, false, true, true, false}):find()
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expect(observable).to.produce(true)
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end)
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it('passes all arguments to the predicate', function()
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local predicate = spy()
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local observable = Rx.Observable.create(function(observer)
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observer:onNext(1, 2, 3)
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observer:onNext(4, 5, 6)
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observer:onCompleted()
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end)
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observable:find(predicate):subscribe()
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expect(predicate).to.equal({{1, 2, 3}, {4, 5, 6}})
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end)
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it('produces the first element for which the predicate returns true and completes', function()
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local observable = Rx.Observable.fromRange(5):find(function(x) return x > 3 end)
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expect(observable).to.produce(4)
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end)
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it('completes after its parent completes if no value satisfied the predicate', function()
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local observable = Rx.Observable.fromRange(5):find(function() return false end)
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expect(observable).to.produce({})
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end)
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end)
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