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package optimizer_test
import (
"strings"
"testing"
"github.com/antonmedv/expr/ast"
"github.com/antonmedv/expr/checker"
"github.com/antonmedv/expr/conf"
"github.com/antonmedv/expr/optimizer"
"github.com/antonmedv/expr/parser"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestOptimize_constant_folding(t *testing.T) {
tree, err := parser.Parse(`[1,2,3][5*5-25]`)
require.NoError(t, err)
err = optimizer.Optimize(&tree.Node, nil)
require.NoError(t, err)
expected := &ast.IndexNode{
Node: &ast.ConstantNode{Value: []int{1, 2, 3}},
Index: &ast.IntegerNode{Value: 0},
}
assert.Equal(t, ast.Dump(expected), ast.Dump(tree.Node))
}
func TestOptimize_in_array(t *testing.T) {
config := conf.New(map[string]int{"v": 0})
tree, err := parser.Parse(`v in [1,2,3]`)
require.NoError(t, err)
_, err = checker.Check(tree, config)
require.NoError(t, err)
err = optimizer.Optimize(&tree.Node, nil)
require.NoError(t, err)
expected := &ast.BinaryNode{
Operator: "in",
Left: &ast.IdentifierNode{Value: "v"},
Right: &ast.ConstantNode{Value: map[int]struct{}{1: {}, 2: {}, 3: {}}},
}
assert.Equal(t, ast.Dump(expected), ast.Dump(tree.Node))
}
func TestOptimize_in_range(t *testing.T) {
tree, err := parser.Parse(`age in 18..31`)
require.NoError(t, err)
err = optimizer.Optimize(&tree.Node, nil)
require.NoError(t, err)
left := &ast.IdentifierNode{
Value: "age",
}
expected := &ast.BinaryNode{
Operator: "and",
Left: &ast.BinaryNode{
Operator: ">=",
Left: left,
Right: &ast.IntegerNode{
Value: 18,
},
},
Right: &ast.BinaryNode{
Operator: "<=",
Left: left,
Right: &ast.IntegerNode{
Value: 31,
},
},
}
assert.Equal(t, ast.Dump(expected), ast.Dump(tree.Node))
}
func TestOptimize_const_range(t *testing.T) {
tree, err := parser.Parse(`-1..1`)
require.NoError(t, err)
err = optimizer.Optimize(&tree.Node, nil)
require.NoError(t, err)
expected := &ast.ConstantNode{
Value: []int{-1, 0, 1},
}
assert.Equal(t, ast.Dump(expected), ast.Dump(tree.Node))
}
func TestOptimize_const_expr(t *testing.T) {
tree, err := parser.Parse(`upper("hello")`)
require.NoError(t, err)
env := map[string]interface{}{
"upper": strings.ToUpper,
}
config := conf.New(env)
config.ConstExpr("upper")
err = optimizer.Optimize(&tree.Node, config)
require.NoError(t, err)
expected := &ast.ConstantNode{
Value: "HELLO",
}
assert.Equal(t, ast.Dump(expected), ast.Dump(tree.Node))
}
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