mirror of
https://github.com/IBM/fp-go.git
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64 lines
1.8 KiB
Go
64 lines
1.8 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 either
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import (
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"testing"
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M "github.com/IBM/fp-go/monoid/testing"
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N "github.com/IBM/fp-go/number"
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"github.com/stretchr/testify/assert"
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)
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func TestApplySemigroup(t *testing.T) {
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sg := ApplySemigroup[string](N.SemigroupSum[int]())
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la := Left[int]("a")
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lb := Left[int]("b")
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r1 := Right[string](1)
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r2 := Right[string](2)
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r3 := Right[string](3)
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assert.Equal(t, la, sg.Concat(la, lb))
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assert.Equal(t, lb, sg.Concat(r1, lb))
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assert.Equal(t, la, sg.Concat(la, r2))
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assert.Equal(t, lb, sg.Concat(r1, lb))
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assert.Equal(t, r3, sg.Concat(r1, r2))
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}
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func TestApplicativeMonoid(t *testing.T) {
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m := ApplicativeMonoid[string](N.MonoidSum[int]())
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la := Left[int]("a")
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lb := Left[int]("b")
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r1 := Right[string](1)
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r2 := Right[string](2)
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r3 := Right[string](3)
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assert.Equal(t, la, m.Concat(la, m.Empty()))
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assert.Equal(t, lb, m.Concat(m.Empty(), lb))
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assert.Equal(t, r1, m.Concat(r1, m.Empty()))
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assert.Equal(t, r2, m.Concat(m.Empty(), r2))
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assert.Equal(t, r3, m.Concat(r1, r2))
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}
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func TestApplicativeMonoidLaws(t *testing.T) {
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m := ApplicativeMonoid[string](N.MonoidSum[int]())
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M.AssertLaws(t, m)([]Either[string, int]{Left[int]("a"), Right[string](1)})
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}
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