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package pipe
import (
"context"
"testing"
"github.com/stretchr/testify/require"
)
func TestPipe(t *testing.T) {
t.Parallel()
runCh := make(chan struct{})
f := func(ctx context.Context) (string, error) {
select {
case <-ctx.Done():
return "", context.Cause(ctx)
case <-runCh:
return "res0", nil
}
}
waitSignal := make(chan struct{}, 10)
signalled := 0
signal := func() {
signalled++
waitSignal <- struct{}{}
}
p, start := NewWithFunction[any](f)
p.OnSendCompletion = signal
go start()
require.Equal(t, false, p.Receiver.Receive())
st := p.Receiver.Status()
require.Equal(t, false, st.Completed)
require.Equal(t, false, st.Canceled)
require.Zero(t, st.Value)
require.Equal(t, 0, signalled)
close(runCh)
<-waitSignal
p.Receiver.Receive()
st = p.Receiver.Status()
require.Equal(t, true, st.Completed)
require.Equal(t, false, st.Canceled)
require.NoError(t, st.Err)
require.Equal(t, "res0", st.Value)
}
func TestPipeCancel(t *testing.T) {
t.Parallel()
runCh := make(chan struct{})
f := func(ctx context.Context) (string, error) {
select {
case <-ctx.Done():
return "", context.Cause(ctx)
case <-runCh:
return "res0", nil
}
}
waitSignal := make(chan struct{}, 10)
signalled := 0
signal := func() {
signalled++
waitSignal <- struct{}{}
}
p, start := NewWithFunction[any](f)
p.OnSendCompletion = signal
go start()
p.Receiver.Receive()
st := p.Receiver.Status()
require.Equal(t, false, st.Completed)
require.Equal(t, false, st.Canceled)
require.Zero(t, st.Value)
require.Equal(t, 0, signalled)
p.Receiver.Cancel()
<-waitSignal
p.Receiver.Receive()
st = p.Receiver.Status()
require.Equal(t, true, st.Completed)
require.Equal(t, true, st.Canceled)
require.Error(t, st.Err)
require.ErrorIs(t, st.Err, context.Canceled)
}
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