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|
package compiler
import (
"fmt"
"testing"
)
func TestASTNode(t *testing.T) {
tests := []struct {
root astNode
nullable bool
first symbolPositionSet
last symbolPositionSet
}{
{
root: newSymbolNode(nil, 0, 1),
nullable: false,
first: newSymbolPositionSet().add(1),
last: newSymbolPositionSet().add(1),
},
{
root: newEndMarkerNode(1, 1),
nullable: false,
first: newSymbolPositionSet().add(1),
last: newSymbolPositionSet().add(1),
},
{
root: newConcatNode(
newSymbolNode(nil, 0, 1),
newSymbolNode(nil, 0, 2),
),
nullable: false,
first: newSymbolPositionSet().add(1),
last: newSymbolPositionSet().add(2),
},
{
root: newConcatNode(
newRepeatNode(newSymbolNode(nil, 0, 1)),
newSymbolNode(nil, 0, 2),
),
nullable: false,
first: newSymbolPositionSet().add(1).add(2),
last: newSymbolPositionSet().add(2),
},
{
root: newConcatNode(
newSymbolNode(nil, 0, 1),
newRepeatNode(newSymbolNode(nil, 0, 2)),
),
nullable: false,
first: newSymbolPositionSet().add(1),
last: newSymbolPositionSet().add(1).add(2),
},
{
root: newConcatNode(
newRepeatNode(newSymbolNode(nil, 0, 1)),
newRepeatNode(newSymbolNode(nil, 0, 2)),
),
nullable: true,
first: newSymbolPositionSet().add(1).add(2),
last: newSymbolPositionSet().add(1).add(2),
},
{
root: newAltNode(
newSymbolNode(nil, 0, 1),
newSymbolNode(nil, 0, 2),
),
nullable: false,
first: newSymbolPositionSet().add(1).add(2),
last: newSymbolPositionSet().add(1).add(2),
},
{
root: newAltNode(
newRepeatNode(newSymbolNode(nil, 0, 1)),
newSymbolNode(nil, 0, 2),
),
nullable: true,
first: newSymbolPositionSet().add(1).add(2),
last: newSymbolPositionSet().add(1).add(2),
},
{
root: newAltNode(
newSymbolNode(nil, 0, 1),
newRepeatNode(newSymbolNode(nil, 0, 2)),
),
nullable: true,
first: newSymbolPositionSet().add(1).add(2),
last: newSymbolPositionSet().add(1).add(2),
},
{
root: newAltNode(
newRepeatNode(newSymbolNode(nil, 0, 1)),
newRepeatNode(newSymbolNode(nil, 0, 2)),
),
nullable: true,
first: newSymbolPositionSet().add(1).add(2),
last: newSymbolPositionSet().add(1).add(2),
},
{
root: newRepeatNode(newSymbolNode(nil, 0, 1)),
nullable: true,
first: newSymbolPositionSet().add(1),
last: newSymbolPositionSet().add(1),
},
{
root: newOptionNode(newSymbolNode(nil, 0, 1)),
nullable: true,
first: newSymbolPositionSet().add(1),
last: newSymbolPositionSet().add(1),
},
}
for i, tt := range tests {
t.Run(fmt.Sprintf("#%v", i), func(t *testing.T) {
if tt.root.nullable() != tt.nullable {
t.Errorf("unexpected nullable attribute; want: %v, got: %v", tt.nullable, tt.root.nullable())
}
if tt.first.hash() != tt.root.first().hash() {
t.Errorf("unexpected first positions attribute; want: %v, got: %v", tt.first, tt.root.first())
}
if tt.last.hash() != tt.root.last().hash() {
t.Errorf("unexpected last positions attribute; want: %v, got: %v", tt.last, tt.root.last())
}
})
}
}
|
