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concurrent_test.go
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package concurrent_test
import (
"context"
"errors"
"testing"
"github.com/gregwebs/go-concurrent"
"github.com/shoenig/test/must"
)
func TestGoN(t *testing.T) {
var err []error
workNone := func(_ int) error { return nil }
err = concurrent.GoN(0, workNone)
must.Nil(t, err)
err = concurrent.GoN(2, workNone)
must.Nil(t, err)
tracked := make([]bool, 10)
workTracked := func(i int) error { tracked[i] = true; return nil }
err = concurrent.GoN(0, workTracked)
must.Nil(t, err)
must.False(t, tracked[0])
tracked = make([]bool, 10)
err = concurrent.GoN(2, workTracked)
must.Nil(t, err)
must.False(t, tracked[2])
must.True(t, tracked[1])
must.True(t, tracked[0])
}
func TestGoNSerials(t *testing.T) {
var err []error
gr := concurrent.GoSerial()
workNone := func(_ int) error { return nil }
err = gr.GoN(0, workNone)
must.Nil(t, err)
err = gr.GoN(2, workNone)
must.Nil(t, err)
tracked := make([]bool, 10)
workTracked := func(i int) error { tracked[i] = true; return nil }
err = gr.GoN(0, workTracked)
must.Nil(t, err)
must.False(t, tracked[0])
tracked = make([]bool, 10)
err = gr.GoN(2, workTracked)
must.Nil(t, err)
must.False(t, tracked[2])
must.True(t, tracked[1])
must.True(t, tracked[0])
}
func TestGoEach(t *testing.T) {
var err []error
tracked := make([]bool, 10)
workNone := func(_ bool) error { return nil }
err = concurrent.GoEach(tracked, workNone)
must.Nil(t, err)
workTracked := func(_ bool) error { tracked[0] = true; return nil }
err = concurrent.GoEach(tracked, workTracked)
must.Nil(t, err)
must.False(t, tracked[1])
must.True(t, tracked[0])
workTracked = func(_ bool) error { tracked[1] = true; return nil }
err = concurrent.GoEach(tracked, workTracked)
must.Nil(t, err)
must.False(t, tracked[2])
must.True(t, tracked[1])
must.True(t, tracked[0])
}
func TestGoEachSerial(t *testing.T) {
var err []error
tracked := make([]bool, 10)
workNone := func(_ bool) error { return nil }
gr := concurrent.GoSerial()
err = concurrent.GoEachRoutine(tracked, workNone)(gr)
must.Nil(t, err)
workTracked := func(_ bool) error { tracked[0] = true; return nil }
err = concurrent.GoEachRoutine(tracked, workTracked)(gr)
must.Nil(t, err)
must.False(t, tracked[1])
must.True(t, tracked[0])
workTracked = func(_ bool) error { tracked[1] = true; return nil }
err = concurrent.GoEachRoutine(tracked, workTracked)(gr)
must.Nil(t, err)
must.False(t, tracked[2])
must.True(t, tracked[1])
must.True(t, tracked[0])
}
func TestChannelMerge(t *testing.T) {
{
c1 := make(chan error)
c2 := make(chan error)
close(c1)
close(c2)
err, ok := concurrent.TryRecv(concurrent.ChannelMerge(c1, c2))
must.False(t, ok)
must.Nil(t, err)
}
{
c1 := make(chan error)
c2 := make(chan error)
go func() {
c1 <- errors.New("c1")
c2 <- errors.New("c2")
close(c1)
close(c2)
}()
merged := concurrent.ChannelMerge(c1, c2)
_, ok := <-merged
must.True(t, ok)
_, ok = <-merged
must.True(t, ok)
_, ok = <-merged
must.False(t, ok)
}
}
func TestGroup(t *testing.T) {
ctx := context.Background()
var err []error
workNone := func() error { return nil }
group, _ := concurrent.NewGroupContext(ctx)
group.Go(workNone)
err = group.Wait()
must.Nil(t, err)
group.Go(workNone)
err = group.Wait()
must.Nil(t, err)
tracked := make([]bool, 0, 10)
workTracked := func() error { tracked = append(tracked, true); return nil }
err = group.Wait()
must.Nil(t, err)
must.Len(t, 0, tracked)
tracked = make([]bool, 0, 10)
group.Go(workTracked)
group.Go(workTracked)
err = group.Wait()
must.Nil(t, err)
must.Len(t, 2, tracked)
must.True(t, tracked[1])
must.True(t, tracked[0])
}