mirror of
https://github.com/IBM/fp-go.git
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74 lines
1.7 KiB
Go
74 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 iooption
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import (
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"fmt"
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"os"
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"testing"
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F "github.com/IBM/fp-go/function"
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"github.com/IBM/fp-go/internal/utils"
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I "github.com/IBM/fp-go/io"
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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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func TestMap(t *testing.T) {
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assert.Equal(t, O.Of(2), F.Pipe1(
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Of(1),
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Map(utils.Double),
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)())
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}
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func TestChainOptionK(t *testing.T) {
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f := ChainOptionK(func(n int) O.Option[int] {
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if n > 0 {
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return O.Of(n)
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}
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return O.None[int]()
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})
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assert.Equal(t, O.Of(1), f(Of(1))())
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assert.Equal(t, O.None[int](), f(Of(-1))())
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assert.Equal(t, O.None[int](), f(None[int]())())
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}
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func TestFromOption(t *testing.T) {
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f := FromOption[int]
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assert.Equal(t, O.Of(1), f(O.Some(1))())
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assert.Equal(t, O.None[int](), f(O.None[int]())())
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}
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func TestChainIOK(t *testing.T) {
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f := ChainIOK(func(n int) I.IO[string] {
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return I.MakeIO(func() string {
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return fmt.Sprintf("%d", n)
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})
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})
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assert.Equal(t, O.Of("1"), f(Of(1))())
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assert.Equal(t, O.None[string](), f(None[int]())())
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}
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func TestEnv(t *testing.T) {
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env := Optionize1(os.LookupEnv)
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assert.True(t, O.IsSome(env("PATH")()))
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assert.False(t, O.IsSome(env("PATHxyz")()))
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}
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