mirror of
https://github.com/IBM/fp-go.git
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43 lines
1.4 KiB
Go
43 lines
1.4 KiB
Go
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// 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 ioeither
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import (
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"fmt"
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"testing"
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E "github.com/IBM/fp-go/either"
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S "github.com/IBM/fp-go/string"
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"github.com/stretchr/testify/assert"
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)
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func TestApplicativeMonoid(t *testing.T) {
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m := ApplicativeMonoid[error](S.Monoid)
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// good cases
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assert.Equal(t, E.Of[error]("ab"), m.Concat(Of[error]("a"), Of[error]("b"))())
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assert.Equal(t, E.Of[error]("a"), m.Concat(Of[error]("a"), m.Empty())())
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assert.Equal(t, E.Of[error]("b"), m.Concat(m.Empty(), Of[error]("b"))())
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// bad cases
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e1 := fmt.Errorf("e1")
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e2 := fmt.Errorf("e1")
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assert.Equal(t, E.Left[string](e1), m.Concat(Left[string](e1), Of[error]("b"))())
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assert.Equal(t, E.Left[string](e1), m.Concat(Left[string](e1), Left[string](e2))())
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assert.Equal(t, E.Left[string](e2), m.Concat(Of[error]("a"), Left[string](e2))())
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}
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