85 lines
3.4 KiB
FSharp
85 lines
3.4 KiB
FSharp
namespace NightLight.Core.Tests
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open NightLight.Core.Core
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open NightLight.Core.Tests.TimeChangedGenerators
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open NightLight.Core.Tests.InteractionListGenerators
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open FsCheck.Xunit
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open FsCheck.FSharp
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type NightLightTests() =
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let createFakeHomeWithNightLightAndInteract (interactions: Interaction list) =
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let mutable nightLightStateMachine = NightLightStateMachine()
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let fakeHome = FakeHome()
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fakeHome.OnEventPublished.Add(fun event ->
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match event |> nightLightStateMachine.OnEventReceived with
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| Ok(newState, commands) ->
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commands |> Seq.iter fakeHome.ProcessCommand
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nightLightStateMachine <- newState
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| Error error -> failwith $"Unexpected error {error}")
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fakeHome.Interact interactions
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fakeHome
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let doesLightHavePowerAfter interactions light =
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interactions
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|> Seq.choose (fun interaction ->
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match interaction with
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| HumanInteraction(LightPoweredOff l) when l = light -> Some false
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| HumanInteraction(LightPoweredOn l) when l = light -> Some true
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| _ -> None)
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|> Seq.tryLast
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|> Option.defaultValue false
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[<Property>]
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let ``All lights that are on should be white or yellow during the day`` () =
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genTimeChangedToDay
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|> Gen.bind (fun timeChangedToDay -> genInteractionListContaining timeChangedToDay _.IsTimeChanged)
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|> Arb.fromGen
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|> Prop.forAll
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<| fun interactions ->
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let fakeHome = createFakeHomeWithNightLightAndInteract interactions
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fakeHome.ForAllLightsThatAreOn(fun (_, _, color) -> color = White || color = Yellow)
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[<Property>]
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let ``All lights that are on should be red during the night`` () =
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genTimeChangedToNight
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|> Gen.bind (fun timeChangedToNight -> genInteractionListContaining timeChangedToNight _.IsTimeChanged)
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|> Arb.fromGen
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|> Prop.forAll
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<| fun interactions ->
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let fakeHome = createFakeHomeWithNightLightAndInteract interactions
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fakeHome.ForAllLightsThatAreOn(fun (_, _, color) -> color = Red)
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[<Property>]
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let ``After pressing 'On' on the remote, the remotely controlled lights that have power should be on until they are powered off or 'Off' is pressed``
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()
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=
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genInteractionListContaining (HumanInteraction RemotePressedOnButton) (function
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| HumanInteraction RemotePressedOffButton -> true
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| HumanInteraction(LightPoweredOff l) when l.ControlledWithRemote -> true
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| _ -> false)
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|> Arb.fromGen
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|> Prop.forAll
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<| fun interactions ->
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let fakeHome = createFakeHomeWithNightLightAndInteract interactions
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fakeHome.LightStates
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|> Seq.filter (fst >> doesLightHavePowerAfter interactions)
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|> Seq.map snd
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|> Seq.forall _.IsOn
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[<Property>]
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let ``After pressing 'Off' on the remote, the remotely controlled lights should stay off until 'On' is pressed``
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()
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=
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genInteractionListContaining
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(HumanInteraction RemotePressedOffButton)
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((=) (HumanInteraction RemotePressedOnButton))
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|> Arb.fromGen
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|> Prop.forAll
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<| fun interactions ->
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let fakeHome = createFakeHomeWithNightLightAndInteract interactions
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fakeHome.ForAllRemotelyControlledLights(fun (_, state) -> state = Off)
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