mirror of
https://github.com/IBM/fp-go.git
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165 lines
3.6 KiB
Go
165 lines
3.6 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 readerioeither
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import (
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"context"
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"fmt"
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"testing"
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"time"
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E "github.com/IBM/fp-go/either"
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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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"github.com/stretchr/testify/assert"
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)
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func TestInnerContextCancelSemantics(t *testing.T) {
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// start with a simple context
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outer := context.Background()
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parent, parentCancel := context.WithCancel(outer)
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defer parentCancel()
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inner, innerCancel := context.WithCancel(parent)
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defer innerCancel()
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assert.NoError(t, parent.Err())
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assert.NoError(t, inner.Err())
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innerCancel()
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assert.NoError(t, parent.Err())
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assert.Error(t, inner.Err())
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}
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func TestOuterContextCancelSemantics(t *testing.T) {
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// start with a simple context
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outer := context.Background()
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parent, outerCancel := context.WithCancel(outer)
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defer outerCancel()
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inner, innerCancel := context.WithCancel(parent)
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defer innerCancel()
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assert.NoError(t, parent.Err())
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assert.NoError(t, inner.Err())
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outerCancel()
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assert.Error(t, parent.Err())
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assert.Error(t, inner.Err())
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}
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func TestOuterAndInnerContextCancelSemantics(t *testing.T) {
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// start with a simple context
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outer := context.Background()
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parent, outerCancel := context.WithCancel(outer)
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defer outerCancel()
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inner, innerCancel := context.WithCancel(parent)
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defer innerCancel()
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assert.NoError(t, parent.Err())
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assert.NoError(t, inner.Err())
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outerCancel()
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innerCancel()
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assert.Error(t, parent.Err())
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assert.Error(t, inner.Err())
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outerCancel()
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innerCancel()
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assert.Error(t, parent.Err())
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assert.Error(t, inner.Err())
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}
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func TestCancelCauseSemantics(t *testing.T) {
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// start with a simple context
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outer := context.Background()
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parent, outerCancel := context.WithCancelCause(outer)
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defer outerCancel(nil)
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inner := context.WithValue(parent, "key", "value")
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assert.NoError(t, parent.Err())
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assert.NoError(t, inner.Err())
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err := fmt.Errorf("test error")
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outerCancel(err)
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assert.Error(t, parent.Err())
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assert.Error(t, inner.Err())
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assert.Equal(t, err, context.Cause(parent))
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assert.Equal(t, err, context.Cause(inner))
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}
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func TestTimer(t *testing.T) {
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delta := 3 * time.Second
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timer := Timer(delta)
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ctx := context.Background()
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t0 := time.Now()
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res := timer(ctx)()
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t1 := time.Now()
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assert.WithinDuration(t, t0.Add(delta), t1, time.Second)
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assert.True(t, E.IsRight(res))
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}
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func TestCanceledApply(t *testing.T) {
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// our error
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err := fmt.Errorf("TestCanceledApply")
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// the actual apply value errors out after some time
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errValue := F.Pipe1(
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Left[string](err),
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Delay[string](time.Second),
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)
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// function never resolves
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fct := Never[func(string) string]()
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// apply the values, we expect an error after 1s
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applied := F.Pipe1(
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fct,
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Ap[string, string](errValue),
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)
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res := applied(context.Background())()
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assert.Equal(t, E.Left[string](err), res)
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}
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func TestRegularApply(t *testing.T) {
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value := Of("Carsten")
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fct := Of(utils.Upper)
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applied := F.Pipe1(
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fct,
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Ap[string, string](value),
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)
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res := applied(context.Background())()
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assert.Equal(t, E.Of[error]("CARSTEN"), res)
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}
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