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// 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 regexp
import (
"os";
"regexp";
"testing";
)
var good_re = []string{
``,
`.`,
`^.$`,
`a`,
`a*`,
`a+`,
`a?`,
`a|b`,
`a*|b*`,
`(a*|b)(c*|d)`,
`[a-z]`,
`[a-abc-c\-\]\[]`,
`[a-z]+`,
`[]`,
`[abc]`,
`[^1234]`,
}
// TODO: nice to do this with a map but we don't have an iterator
type StringError struct {
re string;
err *os.Error;
}
var bad_re = []StringError{
StringError{ `*`, regexp.ErrBareClosure },
StringError{ `(abc`, regexp.ErrUnmatchedLpar },
StringError{ `abc)`, regexp.ErrUnmatchedRpar },
StringError{ `x[a-z`, regexp.ErrUnmatchedLbkt },
StringError{ `abc]`, regexp.ErrUnmatchedRbkt },
StringError{ `[z-a]`, regexp.ErrBadRange },
StringError{ `abc\`, regexp.ErrExtraneousBackslash },
StringError{ `a**`, regexp.ErrBadClosure },
StringError{ `a*+`, regexp.ErrBadClosure },
StringError{ `a??`, regexp.ErrBadClosure },
StringError{ `*`, regexp.ErrBareClosure },
StringError{ `\x`, regexp.ErrBadBackslash },
}
type Vec []int;
type Tester struct {
re string;
text string;
match Vec;
}
var matches = []Tester {
Tester{ ``, "", Vec{0,0} },
Tester{ `a`, "a", Vec{0,1} },
Tester{ `b`, "abc", Vec{1,2} },
Tester{ `.`, "a", Vec{0,1} },
Tester{ `.*`, "abcdef", Vec{0,6} },
Tester{ `^abcd$`, "abcd", Vec{0,4} },
Tester{ `^bcd'`, "abcdef", Vec{} },
Tester{ `^abcd$`, "abcde", Vec{} },
Tester{ `a+`, "baaab", Vec{1,4} },
Tester{ `a*`, "baaab", Vec{0,0} },
Tester{ `[a-z]+`, "abcd", Vec{0,4} },
Tester{ `[^a-z]+`, "ab1234cd", Vec{2,6} },
Tester{ `[a\-\]z]+`, "az]-bcz", Vec{0,4} },
Tester{ `[日本語]+`, "日本語日本語", Vec{0,18} },
Tester{ `()`, "", Vec{0,0, 0,0} },
Tester{ `(a)`, "a", Vec{0,1, 0,1} },
Tester{ `(.)(.)`, "日a", Vec{0,4, 0,3, 3,4} },
Tester{ `(.*)`, "", Vec{0,0, 0,0} },
Tester{ `(.*)`, "abcd", Vec{0,4, 0,4} },
Tester{ `(..)(..)`, "abcd", Vec{0,4, 0,2, 2,4} },
Tester{ `(([^xyz]*)(d))`, "abcd", Vec{0,4, 0,4, 0,3, 3,4} },
Tester{ `((a|b|c)*(d))`, "abcd", Vec{0,4, 0,4, 2,3, 3,4} },
Tester{ `(((a|b|c)*)(d))`, "abcd", Vec{0,4, 0,4, 0,3, 2,3, 3,4} },
Tester{ `a*(|(b))c*`, "aacc", Vec{0,4, 2,2, -1,-1} },
}
func CompileTest(t *testing.T, expr string, error *os.Error) regexp.Regexp {
re, err := regexp.Compile(expr);
if err != error {
t.Error("compiling `", expr, "`; unexpected error: ", err.String());
}
return re
}
func PrintVec(t *testing.T, m [] int) {
l := len(m);
if l == 0 {
t.Log("\t<no match>");
} else {
for i := 0; i < l; i = i+2 {
t.Log("\t", m[i], ",", m[i+1])
}
}
}
func Equal(m1, m2 []int) bool {
l := len(m1);
if l != len(m2) {
return false
}
for i := 0; i < l; i++ {
if m1[i] != m2[i] {
return false
}
}
return true
}
func MatchTest(t *testing.T, expr string, str string, match []int) {
re := CompileTest(t, expr, nil);
if re == nil {
return
}
m := re.Execute(str);
if !Equal(m, match) {
t.Error("failure on `", expr, "` matching `", str, "`:");
PrintVec(t, m);
t.Log("should be:");
PrintVec(t, match);
}
}
export func TestGoodCompile(t *testing.T) {
for i := 0; i < len(good_re); i++ {
CompileTest(t, good_re[i], nil);
}
}
export func TestBadCompile(t *testing.T) {
for i := 0; i < len(bad_re); i++ {
CompileTest(t, bad_re[i].re, bad_re[i].err)
}
}
export func TestMatch(t *testing.T) {
for i := 0; i < len(matches); i++ {
test := &matches[i];
MatchTest(t, test.re, test.text, test.match)
}
}
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