Function runCommandAndTests

node_exporter_test.go:129–154

(cmd *exec.Cmd, address string, fn func(pid int) error)

}

func runCommandAndTests(cmd *exec.Cmd, address string, fn func(pid int) error) error {
	if err := cmd.Start(); err != nil {
		return fmt.Errorf("failed to start command: %s", err)
	}
	time.Sleep(50 * time.Millisecond)
	for i := range 10 {
		if err := queryExporter(address); err == nil {
			break
		}
		time.Sleep(500 * time.Millisecond)
		if cmd.Process == nil || i == 9 {
			return fmt.Errorf("can't start command")
		}
	}

	errc := make(chan error)
	go func(pid int) {
		errc <- fn(pid)
	}(cmd.Process.Pid)

	err := <-errc
	if cmd.Process != nil {
		cmd.Process.Kill()
	}
	return err
}