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44 lines
1.1 KiB
Go
44 lines
1.1 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 array
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import (
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"testing"
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O "github.com/IBM/fp-go/option"
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"github.com/stretchr/testify/assert"
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)
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type ArrayType = []int
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func TestTraverse(t *testing.T) {
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traverse := Traverse(
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O.Of[ArrayType],
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O.Map[ArrayType, func(int) ArrayType],
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O.Ap[ArrayType, int],
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func(n int) O.Option[int] {
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if n%2 == 0 {
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return O.None[int]()
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}
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return O.Of(n)
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})
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assert.Equal(t, O.None[[]int](), traverse(ArrayType{1, 2}))
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assert.Equal(t, O.Of(ArrayType{1, 3}), traverse(ArrayType{1, 3}))
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}
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