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errorcontext_test.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package errorcontext_test
import (
"context"
"errors"
"testing"
"github.com/smartystreets/assertions"
"go.thethings.network/lorawan-stack/pkg/errorcontext"
"go.thethings.network/lorawan-stack/pkg/util/test"
"go.thethings.network/lorawan-stack/pkg/util/test/assertions/should"
)
var err error
func ExampleErrorContext() {
ctx, cancel := errorcontext.New(test.Context())
defer cancel(nil)
go func() {
for {
// do work
if err != nil {
cancel(err)
}
}
}()
for {
select {
// case data := <-dataChan:
case <-ctx.Done():
return
}
}
}
func TestErrorContext(t *testing.T) {
a := assertions.New(t)
{
err := errors.New("foo")
ctx, cancel := errorcontext.New(test.Context())
cancel(err)
select {
case <-ctx.Done():
a.So(ctx.Err(), should.Equal, err)
default:
t.Error("Context was not done")
}
cancel(errors.New("other"))
<-ctx.Done()
a.So(ctx.Err(), should.Equal, err)
}
{
ctx, cancel := context.WithCancel(test.Context())
ctx, _ = errorcontext.New(ctx)
cancel()
select {
case <-ctx.Done():
a.So(ctx.Err(), should.Equal, context.Canceled)
default:
t.Error("Context was not done")
}
}
}