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package participle
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestErrorReporting(t *testing.T) {
type cls struct {
Visibility string `@"public"?`
Class string `"class" @Ident`
}
type union struct {
Visibility string `@"public"?`
Union string `"union" @Ident`
}
type decl struct {
Class *cls `( @@`
Union *union ` | @@ )`
}
type grammar struct {
Decls []*decl `( @@ ";" )*`
}
p := mustTestParser(t, &grammar{}, UseLookahead(5))
var err error
ast := &grammar{}
err = p.ParseString(`public class A;`, ast)
assert.NoError(t, err)
err = p.ParseString(`public union A;`, ast)
assert.NoError(t, err)
err = p.ParseString(`public struct Bar;`, ast)
assert.EqualError(t, err, `1:8: unexpected token "struct" (expected "union")`)
err = p.ParseString(`public class 1;`, ast)
assert.EqualError(t, err, `1:14: unexpected token "1" (expected <ident>)`)
}
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