func TestInt(t *testing.T) {
	reset()

	ev := RegisterIntVar(testVar, 123, "")
	v, present := ev.Lookup()
	if v != 123 {
		t.Errorf("Expected 123, got %v", v)
	}
	if present {
		t.Errorf("Expected not present")
	}

	v = ev.Get()
	if v != 123 {
		t.Errorf("Expected 123, got %v", v)
	}

	_ = os.Setenv(testVar, "XXX")

	ev = RegisterIntVar(testVar, 123, "")
	v, present = ev.Lookup()

	v := Var{Name: name, DefaultValue: strconv.FormatBool(defaultValue), Description: description, Type: BOOL}
	RegisterVar(v)
	return BoolVar{getVar(name)}
}

// RegisterIntVar registers a new integer environment variable.
func RegisterIntVar(name string, defaultValue int, description string) IntVar {
	v := Var{Name: name, DefaultValue: strconv.FormatInt(int64(defaultValue), 10), Description: description, Type: INT}
	RegisterVar(v)