func TestTokenize(t *testing.T) {
if !IsOperatorCh('+') {
t.Error()
}
if !IsVariableCh('5') {
t.Error()
}
if !IsVariableCh('r') {
t.Error()
}
if !IsVariableCh('E') {
t.Error()
}
data := facts.NewFactCollection()
fact := facts.NewFact(`
{
"A" : 1,
"B" : 2,
"C" : 3,
"E" : 3,
"F" : 2,
"G" : 1,
"H" : "hello world"
}
`)
data.Add("u", fact)
/*exprs := []string{"($A + $B) * $C > $E * $F + $G", "$A * 3 + 5 == 8",
"$A > 0", "0 < $A", "0 > $A - $B", "0 > (($A - $B))", "0 != $C - 1",
"(((($A)))) >= 1", "$A > 0 && $B == 2", "$H == \"hello world\""}*/
exprs := []string{"$u.H == \"hello world\""}
a, b := VariableValue("hello world", "$u.H", data)
if a != b {
t.Error(a, b)
}
for _, expr := range exprs {
t.Log(expr)
t.Log("tokenize")
tks := Tokenize(expr)
for _, tk := range tks {
t.Log(tk)
}
pexpr := ToReversePolishNotation(tks)
t.Log(pexpr)
v := CalcReversePolishNotation(pexpr, data)
if v != "true" {
t.Error(expr, v)
}
}
}
func main() {
engine := rulengine.NewRuleEngine()
engine.AddExpression("$user.age > 35", "age_larger_than_35")
engine.AddExpression("$user.gender == male", "male")
engine.AddExpression("$user.gender == female", "female")
engine.AddRule(&logic.Rule{Expression: "age_larger_than_35 & male", Action: "Pass"})
data := facts.NewFactCollection()
user := `
{
"age" : 47,
"gender" : "male"
}
`
fact := facts.NewFact(user)
data.Add("user", fact)
exprNames := engine.GetFiredExpressions(data)
log.Println(exprNames)
actions := engine.GetAction(data)
log.Println(actions)
}