syscall.CloseHandle(h)
	}
	h, err = syscall.Open(dir, syscall.O_RDONLY|syscall.O_CREAT, 0)
	if err == nil {
		t.Error("Open should have failed")
	} else {
		syscall.CloseHandle(h)
	}
}

func TestComputerName(t *testing.T) {
	name, err := syscall.ComputerName()
	if err != nil {
		t.Fatalf("ComputerName failed: %v", err)
	}
	if len(name) == 0 {
		t.Error("ComputerName returned empty string")
	}
}