mirror of
https://github.com/autc04/Retro68.git
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226 lines
4.6 KiB
Go
226 lines
4.6 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package regexp
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import (
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"reflect"
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"regexp/syntax"
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"strings"
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"testing"
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)
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var runeMergeTests = []struct {
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left, right, merged []rune
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next []uint32
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leftPC, rightPC uint32
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}{
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{
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// empty rhs
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[]rune{69, 69},
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[]rune{},
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[]rune{69, 69},
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[]uint32{1},
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1, 2,
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},
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{
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// identical runes, identical targets
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[]rune{69, 69},
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[]rune{69, 69},
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[]rune{},
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[]uint32{mergeFailed},
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1, 1,
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},
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{
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// identical runes, different targets
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[]rune{69, 69},
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[]rune{69, 69},
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[]rune{},
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[]uint32{mergeFailed},
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1, 2,
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},
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{
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// append right-first
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[]rune{69, 69},
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[]rune{71, 71},
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[]rune{69, 69, 71, 71},
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[]uint32{1, 2},
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1, 2,
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},
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{
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// append, left-first
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[]rune{71, 71},
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[]rune{69, 69},
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[]rune{69, 69, 71, 71},
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[]uint32{2, 1},
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1, 2,
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},
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{
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// successful interleave
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[]rune{60, 60, 71, 71, 101, 101},
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[]rune{69, 69, 88, 88},
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[]rune{60, 60, 69, 69, 71, 71, 88, 88, 101, 101},
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[]uint32{1, 2, 1, 2, 1},
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1, 2,
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},
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{
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// left surrounds right
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[]rune{69, 74},
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[]rune{71, 71},
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[]rune{},
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[]uint32{mergeFailed},
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1, 2,
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},
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{
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// right surrounds left
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[]rune{69, 74},
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[]rune{68, 75},
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[]rune{},
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[]uint32{mergeFailed},
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1, 2,
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},
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{
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// overlap at interval begin
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[]rune{69, 74},
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[]rune{74, 75},
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[]rune{},
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[]uint32{mergeFailed},
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1, 2,
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},
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{
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// overlap ar interval end
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[]rune{69, 74},
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[]rune{65, 69},
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[]rune{},
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[]uint32{mergeFailed},
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1, 2,
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},
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{
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// overlap from above
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[]rune{69, 74},
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[]rune{71, 74},
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[]rune{},
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[]uint32{mergeFailed},
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1, 2,
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},
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{
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// overlap from below
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[]rune{69, 74},
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[]rune{65, 71},
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[]rune{},
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[]uint32{mergeFailed},
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1, 2,
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},
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{
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// out of order []rune
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[]rune{69, 74, 60, 65},
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[]rune{66, 67},
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[]rune{},
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[]uint32{mergeFailed},
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1, 2,
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},
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}
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func TestMergeRuneSet(t *testing.T) {
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for ix, test := range runeMergeTests {
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merged, next := mergeRuneSets(&test.left, &test.right, test.leftPC, test.rightPC)
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if !reflect.DeepEqual(merged, test.merged) {
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t.Errorf("mergeRuneSet :%d (%v, %v) merged\n have\n%v\nwant\n%v", ix, test.left, test.right, merged, test.merged)
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}
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if !reflect.DeepEqual(next, test.next) {
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t.Errorf("mergeRuneSet :%d(%v, %v) next\n have\n%v\nwant\n%v", ix, test.left, test.right, next, test.next)
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}
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}
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}
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var onePassTests = []struct {
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re string
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isOnePass bool
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}{
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{`^(?:a|(?:a*))$`, false},
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{`^(?:(a)|(?:a*))$`, false},
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{`^(?:(?:(?:.(?:$))?))$`, true},
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{`^abcd$`, true},
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{`^(?:(?:a{0,})*?)$`, false},
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{`^(?:(?:a+)*)$`, true},
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{`^(?:(?:a|(?:aa)))$`, true},
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{`^(?:[^\s\S])$`, true},
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{`^(?:(?:a{3,4}){0,})$`, false},
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{`^(?:(?:(?:a*)+))$`, true},
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{`^[a-c]+$`, true},
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{`^[a-c]*$`, true},
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{`^(?:a*)$`, true},
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{`^(?:(?:aa)|a)$`, true},
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{`^[a-c]*`, false},
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{`^...$`, true},
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{`^(?:a|(?:aa))$`, true},
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{`^a((b))c$`, true},
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{`^a.[l-nA-Cg-j]?e$`, true},
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{`^a((b))$`, true},
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{`^a(?:(b)|(c))c$`, true},
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{`^a(?:(b*)|(c))c$`, false},
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{`^a(?:b|c)$`, true},
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{`^a(?:b?|c)$`, true},
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{`^a(?:b?|c?)$`, false},
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{`^a(?:b?|c+)$`, true},
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{`^a(?:b+|(bc))d$`, false},
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{`^a(?:bc)+$`, true},
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{`^a(?:[bcd])+$`, true},
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{`^a((?:[bcd])+)$`, true},
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{`^a(:?b|c)*d$`, true},
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{`^.bc(d|e)*$`, true},
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{`^(?:(?:aa)|.)$`, false},
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{`^(?:(?:a{1,2}){1,2})$`, false},
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{`^l` + strings.Repeat("o", 2<<8) + `ng$`, true},
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}
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func TestCompileOnePass(t *testing.T) {
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var (
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p *syntax.Prog
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re *syntax.Regexp
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err error
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)
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for _, test := range onePassTests {
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if re, err = syntax.Parse(test.re, syntax.Perl); err != nil {
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t.Errorf("Parse(%q) got err:%s, want success", test.re, err)
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continue
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}
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// needs to be done before compile...
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re = re.Simplify()
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if p, err = syntax.Compile(re); err != nil {
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t.Errorf("Compile(%q) got err:%s, want success", test.re, err)
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continue
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}
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isOnePass := compileOnePass(p) != nil
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if isOnePass != test.isOnePass {
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t.Errorf("CompileOnePass(%q) got isOnePass=%v, expected %v", test.re, isOnePass, test.isOnePass)
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}
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}
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}
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// TODO(cespare): Unify with onePassTests and rationalize one-pass test cases.
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var onePassTests1 = []struct {
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re string
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match string
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}{
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{`^a(/b+(#c+)*)*$`, "a/b#c"}, // golang.org/issue/11905
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}
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func TestRunOnePass(t *testing.T) {
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for _, test := range onePassTests1 {
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re, err := Compile(test.re)
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if err != nil {
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t.Errorf("Compile(%q): got err: %s", test.re, err)
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continue
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}
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if re.onepass == nil {
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t.Errorf("Compile(%q): got nil, want one-pass", test.re)
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continue
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}
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if !re.MatchString(test.match) {
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t.Errorf("onepass %q did not match %q", test.re, test.match)
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}
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}
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}
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