// Copyright (c) 2024 Celestino Amoroso (celestino.amoroso@gmail.com).
// All rights reserved.
// t_funcs_test.go
package expr
import (
"errors"
"testing"
)
func TestFuncs(t *testing.T) {
section := "Funcs"
inputs := []inputType{
/* 1 */ {`two=func(){2}; two()`, int64(2), nil},
/* 2 */ {`double=func(x) {2*x}; (double(3))`, int64(6), nil},
/* 3 */ {`double=func(x){2*x}; double(3)`, int64(6), nil},
/* 4 */ {`double=func(x){2*x}; a=5; double(3+a) + 1`, int64(17), nil},
/* 5 */ {`double=func(x){2*x}; a=5; two=func() {2}; (double(3+a) + 1) * two()`, int64(34), nil},
/* 6 */ {`@x="hello"; @x`, nil, errors.New(`[1:3] variable references are not allowed in top level expressions: "@x"`)},
/* 7 */ {`f=func(){@x="hello"}; f(); x`, "hello", nil},
/* 8 */ {`f=func(@y){@y=@y+1}; f(2); y`, int64(3), nil},
/* 9 */ {`f=func(@y){g=func(){@x=5}; @y=@y+g()}; f(2); y+x`, nil, errors.New(`undefined variable or function "x"`)},
/* 10 */ {`f=func(@y){g=func(){@x=5}; @z=g(); @y=@y+@z}; f(2); y+z`, int64(12), nil},
/* 11 */ {`f=func(@y){g=func(){@x=5}; g(); @z=x; @y=@y+@z}; f(2); y+z`, int64(12), nil},
/* 12 */ {`f=func(@y){g=func(){@x=5}; g(); @z=x; @x=@y+@z}; f(2); y+x`, int64(9), nil},
/* 13 */ {`two=func(){2}; four=func(f){f()+f()}; four(two)`, int64(4), nil},
/* 14 */ {`two=func(){2}; two(123)`, nil, errors.New(`two(): too much params -- expected 0, got 1`)},
}
t.Setenv("EXPR_PATH", ".")
// parserTestSpec(t, section, inputs, 69)
parserTest(t, section, inputs)
}
func dummy(ctx ExprContext, name string, args []any) (result any, err error) {
return
}
func TestFunctionToStringSimple(t *testing.T) {
source := newGolangFunctor(dummy)
want := "func() {<body>}"
got := source.ToString(0)
if got != want {
t.Errorf(`(func() -> result = %v [%T], want = %v [%T]`, got, got, want, want)
}
}
func TestFunctionGetFunc(t *testing.T) {
source := newGolangFunctor(dummy)
want := ExprFunc(nil)
got := source.GetFunc()
if got != want {
t.Errorf(`(func() -> result = %v [%T], want = %v [%T]`, got, got, want, want)
}
}