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open QCheck2
module Suite
(R : Model.COVARIANT_1)
(I : Preface_specs.INVARIANT with type 'a t = 'a R.t)
(A : Model.T0)
(B : Model.T0)
(C : Model.T0) =
struct
module Laws = Preface_laws.Invariant.For (I)
let print pp' = Format.asprintf "%a" (R.pp pp')
let invariant_1 count =
let print = print A.pp in
let generator = R.generator A.generator in
Util.test ~count ~print generator Laws.invariant_1 (fun lhs rhs x ->
let left = lhs x
and right = rhs x in
R.equal A.equal left right )
;;
let invariant_2 count =
let print (_, x) = Format.asprintf "%a" (R.pp C.pp) x in
let generator =
let g = fun1 A.observable B.generator
and g' = fun1 B.observable A.generator
and f = fun1 C.observable A.generator
and f' = fun1 A.observable C.generator in
Gen.tup2 (Gen.tup4 g g' f f') (R.generator C.generator)
in
Util.test ~count ~print generator Laws.invariant_2
(fun lhs rhs ((fg, fg', ff, ff'), x) ->
let g = Fn.apply fg
and g' = Fn.apply fg'
and f = Fn.apply ff
and f' = Fn.apply ff' in
let left = lhs g g' f f' x
and right = rhs g g' f f' x in
R.equal B.equal left right )
;;
let tests ~count = [ invariant_1 count; invariant_2 count ]
end
module Suite_contravariant
(R : Model.CONTRAVARIANT_1)
(I : Preface_specs.INVARIANT with type 'a t = 'a R.t)
(A : Model.T0)
(B : Model.T0)
(C : Model.T0) =
struct
module Laws = Preface_laws.Invariant.For (I)
let invariant_1 count =
let generator = R.generator A.observable
and input = R.input A.generator in
Util.test ~count (Gen.tup2 generator input) Laws.invariant_1
(fun lhs rhs (c, x) ->
let c = R.lift c in
let left = lhs c
and right = rhs c in
R.run_equality x left right )
;;
let invariant_2 count =
let generator =
Gen.tup5
(fun1 A.observable B.generator)
(fun1 B.observable A.generator)
(fun1 C.observable A.generator)
(fun1 A.observable C.generator)
(R.generator C.observable)
and input = R.input B.generator in
Util.test ~count (Gen.tup2 generator input) Laws.invariant_2
(fun lhs rhs ((f, g, h, i, c), x) ->
let f = Fn.apply f
and g = Fn.apply g
and h = Fn.apply h
and i = Fn.apply i
and c = R.lift c in
let left = lhs f g h i c
and right = rhs f g h i c in
R.run_equality x left right )
;;
let tests ~count = [ invariant_1 count; invariant_2 count ]
end