func checkRuleErrorCode(a assert.Assert, err error, expected RuleErrorCode) {
a = a.Stack(1)
if err == nil {
a.Errorf("No error provided.")
return
}
casted, ok := err.(RuleError)
if !ok {
a.Errorf("Invalid Error type: %s", err.Error())
return
}
a.EqInt(int(casted.Code()), int(expected))
}
