| Copyright | (C) 2017 ATS Advanced Telematic Systems GmbH |
|---|---|
| License | BSD-style (see the file LICENSE) |
| Maintainer | Stevan Andjelkovic <stevan@advancedtelematic.com> |
| Stability | provisional |
| Portability | non-portable (GHC extensions) |
| Safe Haskell | None |
| Language | Haskell2010 |
Test.StateMachine.Types
Contents
Description
This module contains the main types exposed to the user. The module is perhaps best read indirectly, on a per need basis, via the main module Test.StateMachine.
- data Untyped act where
- type StateMachine model act m = StateMachine' model act m Void
- stateMachine :: forall m model act. Functor m => Generator model act -> Shrinker act -> Precondition model act -> Transition model act -> Postcondition model act -> InitialModel model -> Semantics act m -> Runner m -> StateMachine' model act m Void
- okTransition :: Transition model act -> Transition' model act Void
- okPostcondition :: Postcondition model act -> Postcondition' model act Void
- okSemantics :: Functor m => Semantics act m -> Semantics' act m Void
- data StateMachine' model act m err = StateMachine {
- generator' :: Generator model act
- shrinker' :: Shrinker act
- precondition' :: Precondition model act
- transition' :: Transition' model act err
- postcondition' :: Postcondition' model act err
- model' :: InitialModel model
- semantics' :: Semantics' act m err
- runner' :: Runner m
- type Generator model act = model Symbolic -> Gen (Untyped act)
- type Shrinker act = forall v resp. act v resp -> [act v resp]
- type Precondition model act = forall resp. model Symbolic -> act Symbolic resp -> Bool
- type Transition model act = forall resp v. (Ord1 v, Show1 v) => model v -> act v resp -> v resp -> model v
- type Transition' model act err = forall resp v. (Ord1 v, Show1 v) => model v -> act v resp -> Result err (v resp) -> model v
- type Postcondition model act = forall resp. model Concrete -> act Concrete resp -> resp -> Bool
- type Postcondition' model act err = forall resp. model Concrete -> act Concrete resp -> Result err resp -> Bool
- type InitialModel m = forall v. m v
- data Result err resp
- ppResult :: (Show err, Show resp) => Result err resp -> String
- type Semantics act m = forall resp. act Concrete resp -> m resp
- type Semantics' act m err = forall resp. act Concrete resp -> m (Result err resp)
- type Runner m = m Property -> IO Property
- data Reason
- module Test.StateMachine.Types.Generics
- module Test.StateMachine.Types.HFunctor
- module Test.StateMachine.Types.References
Untyped actions
data Untyped act where Source #
An untyped action is an action where the response type is hidden away using an existential type.
We need to hide the response type when generating actions, because in general the actions we want to generate will have different response types; and thus we can only type the generating function if we hide the response type.
Type aliases
type StateMachine model act m = StateMachine' model act m Void Source #
A (non-failing) state machine record bundles up all functionality needed to perform our tests.
stateMachine :: forall m model act. Functor m => Generator model act -> Shrinker act -> Precondition model act -> Transition model act -> Postcondition model act -> InitialModel model -> Semantics act m -> Runner m -> StateMachine' model act m Void Source #
Helper for lifting non-failing semantics to a possibly failing state machine record.
okTransition :: Transition model act -> Transition' model act Void Source #
okPostcondition :: Postcondition model act -> Postcondition' model act Void Source #
okSemantics :: Functor m => Semantics act m -> Semantics' act m Void Source #
data StateMachine' model act m err Source #
Same as above, but with possibly failing semantics.
Constructors
| StateMachine | |
Fields
| |
type Generator model act = model Symbolic -> Gen (Untyped act) Source #
When generating actions we have access to a model containing symbolic references.
type Shrinker act = forall v resp. act v resp -> [act v resp] Source #
Shrinking should preserve the response type of the action.
type Precondition model act = forall resp. model Symbolic -> act Symbolic resp -> Bool Source #
Pre-conditions are checked while generating, at this stage we do not yet have access to concrete references.
type Transition model act = forall resp v. (Ord1 v, Show1 v) => model v -> act v resp -> v resp -> model v Source #
The transition function must be polymorphic in the type of variables used, as it is used both while generating and executing.
type Transition' model act err = forall resp v. (Ord1 v, Show1 v) => model v -> act v resp -> Result err (v resp) -> model v Source #
type Postcondition model act = forall resp. model Concrete -> act Concrete resp -> resp -> Bool Source #
Post-conditions are checked after the actions have been executed and we got a response.
type Postcondition' model act err = forall resp. model Concrete -> act Concrete resp -> Result err resp -> Bool Source #
type InitialModel m = forall v. m v Source #
The initial model is polymorphic in the type of references it uses, so that it can be used both in the pre- and the post-condition check.
The result of executing an action.
type Semantics act m = forall resp. act Concrete resp -> m resp Source #
When we execute our actions we have access to concrete references.
type Semantics' act m err = forall resp. act Concrete resp -> m (Result err resp) Source #
Constructors
| Ok | |
| PreconditionFailed | |
| PostconditionFailed |