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package jsonstream
import (
"context"
"encoding/json"
"fmt"
"io"
"testing"
"time"
"github.com/docker/cli/cli/streams"
"gotest.tools/v3/assert"
)
func TestDisplay(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
t.Cleanup(cancel)
client, server := io.Pipe()
t.Cleanup(func() {
assert.NilError(t, server.Close())
})
go func() {
enc := json.NewEncoder(server)
for i := 0; i < 100; i++ {
select {
case <-ctx.Done():
assert.NilError(t, server.Close(), "failed to close jsonmessage server")
return
default:
err := enc.Encode(JSONMessage{
Status: "Downloading",
ID: fmt.Sprintf("id-%d", i),
Progress: &JSONProgress{
Current: int64(i),
Total: 100,
Start: 0,
},
})
if err != nil {
break
}
time.Sleep(100 * time.Millisecond)
}
}
}()
streamCtx, cancelStream := context.WithCancel(context.Background())
t.Cleanup(cancelStream)
done := make(chan error)
go func() {
out := streams.NewOut(io.Discard)
done <- Display(streamCtx, client, out)
}()
cancelStream()
select {
case <-time.After(time.Second * 3):
case err := <-done:
assert.ErrorIs(t, err, context.Canceled)
}
}
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