mirror of
https://github.com/IBM/fp-go.git
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55 lines
1.4 KiB
Go
55 lines
1.4 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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"os"
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"testing"
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F "github.com/IBM/fp-go/function"
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"github.com/stretchr/testify/assert"
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)
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func TestWithResource(t *testing.T) {
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onCreate := func() Either[error, *os.File] {
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return TryCatchError(func() (*os.File, error) {
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return os.CreateTemp("", "*")
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})
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}
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onDelete := F.Flow2(
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func(f *os.File) Either[error, string] {
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return TryCatchError(func() (string, error) {
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return f.Name(), f.Close()
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})
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},
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Chain(func(name string) Either[error, any] {
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return TryCatchError(func() (any, error) {
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return name, os.Remove(name)
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})
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}),
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)
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onHandler := func(f *os.File) Either[error, string] {
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return Of[error](f.Name())
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}
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tempFile := WithResource[error, *os.File, string](onCreate, onDelete)
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resE := tempFile(onHandler)
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assert.True(t, IsRight(resE))
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}
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