// waitOrFail waits for the child to exit, draining all its output.
// If a non-negative return value is provided, child exit status must match.
func waitOrFail(t *testing.T, child *gexpect.ExpectSubprocess, expectedStatus int) {
bufOut := []string{}
// TODO(lucab): gexpect should accept those channels from the caller
ttyIn, ttyOut := child.AsyncInteractChannels()
close(ttyIn)
// drain output till gexpect closes the channel (on EOF or error)
for line := range ttyOut {
bufOut = append(bufOut, line)
}
err := child.Wait()
status, _ := common.GetExitStatus(err)
if expectedStatus >= 0 && status != expectedStatus {
t.Fatalf("rkt terminated with unexpected status %d, expected %d\nOutput:\n%s", status, expectedStatus, bufOut)
}
}
