1
0
mirror of https://github.com/IBM/fp-go.git synced 2025-07-09 01:05:51 +02:00
Files
fp-go/state/testing/laws.go
Dr. Carsten Leue 01d490b710 fix: add State monad
Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>
2024-02-13 14:23:33 +01:00

79 lines
1.6 KiB
Go

// Copyright (c) 2023 IBM Corp.
// All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package testing
import (
"testing"
EQ "github.com/IBM/fp-go/eq"
L "github.com/IBM/fp-go/internal/monad/testing"
ST "github.com/IBM/fp-go/state"
)
// AssertLaws asserts the apply monad laws for the `Either` monad
func AssertLaws[S, A, B, C any](t *testing.T,
eqw EQ.Eq[S],
eqa EQ.Eq[A],
eqb EQ.Eq[B],
eqc EQ.Eq[C],
ab func(A) B,
bc func(B) C,
s S,
) func(a A) bool {
fofc := ST.Pointed[S, C]()
fofaa := ST.Pointed[S, func(A) A]()
fofbc := ST.Pointed[S, func(B) C]()
fofabb := ST.Pointed[S, func(func(A) B) B]()
fmap := ST.Functor[S, func(B) C, func(func(A) B) func(A) C]()
fapabb := ST.Applicative[S, func(A) B, B]()
fapabac := ST.Applicative[S, func(A) B, func(A) C]()
maa := ST.Monad[S, A, A]()
mab := ST.Monad[S, A, B]()
mac := ST.Monad[S, A, C]()
mbc := ST.Monad[S, B, C]()
return L.MonadAssertLaws(t,
ST.Eq(eqw, eqa)(s),
ST.Eq(eqw, eqb)(s),
ST.Eq(eqw, eqc)(s),
fofc,
fofaa,
fofbc,
fofabb,
fmap,
fapabb,
fapabac,
maa,
mab,
mac,
mbc,
ab,
bc,
)
}