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