blob: b086facc3ed3a24cae0f4a9be8cfd64e58e7a130 [file] [log] [blame]
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ebnf
import (
"go/token"
"io/ioutil"
"testing"
)
var fset = token.NewFileSet()
var goodGrammars = []string{
`Program = .`,
`Program = foo .
foo = "foo" .`,
`Program = "a" | "b" "c" .`,
`Program = "a" … "z" .`,
`Program = Song .
Song = { Note } .
Note = Do | (Re | Mi | Fa | So | La) | Ti .
Do = "c" .
Re = "d" .
Mi = "e" .
Fa = "f" .
So = "g" .
La = "a" .
Ti = ti .
ti = "b" .`,
}
var badGrammars = []string{
`Program = | .`,
`Program = | b .`,
`Program = a … b .`,
`Program = "a" … .`,
`Program = … "b" .`,
`Program = () .`,
`Program = [] .`,
`Program = {} .`,
}
func checkGood(t *testing.T, filename string, src []byte) {
grammar, err := Parse(fset, filename, src)
if err != nil {
t.Errorf("Parse(%s) failed: %v", src, err)
}
if err = Verify(fset, grammar, "Program"); err != nil {
t.Errorf("Verify(%s) failed: %v", src, err)
}
}
func checkBad(t *testing.T, filename string, src []byte) {
_, err := Parse(fset, filename, src)
if err == nil {
t.Errorf("Parse(%s) should have failed", src)
}
}
func TestGrammars(t *testing.T) {
for _, src := range goodGrammars {
checkGood(t, "", []byte(src))
}
for _, src := range badGrammars {
checkBad(t, "", []byte(src))
}
}
var files = []string{
// TODO(gri) add some test files
}
func TestFiles(t *testing.T) {
for _, filename := range files {
src, err := ioutil.ReadFile(filename)
if err != nil {
t.Fatal(err)
}
checkGood(t, filename, src)
}
}