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|
package ci_test
import (
"bytes"
"context"
"os"
"path/filepath"
"testing"
"hakurei.app/cmd/mbf/internal/ci"
)
func TestFollow(t *testing.T) {
t.Parallel()
pathname := filepath.Join(t.TempDir(), "f")
w, err := os.Create(pathname)
if err != nil {
t.Fatal(err)
}
var buf bytes.Buffer
ctx, cancel := context.WithCancel(t.Context())
var want string
go func() {
defer cancel()
for _, s := range []string{
"\xde\xad\xbe\xef",
"\xff\xff\xff\xff",
"\x00\x00",
} {
want += s
if _, _err := w.WriteString(s); _err != nil {
panic(_err)
}
}
}()
retry:
if err = ci.Follow(ctx, pathname, &buf); err != nil {
t.Fatal(err)
}
<-ctx.Done()
// the inotify event takes time to arrive, and there is no way to
// synchronise for this cleanly
if buf.Len() != len(want) {
goto retry
}
if got := buf.String(); got != want {
t.Fatalf("follow: %q, want %q", got, want)
}
}
|
