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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 19:23:18 +0000 |
commit | 43a123c1ae6613b3efeed291fa552ecd909d3acf (patch) | |
tree | fd92518b7024bc74031f78a1cf9e454b65e73665 /src/regexp/onepass_test.go | |
parent | Initial commit. (diff) | |
download | golang-1.20-upstream.tar.xz golang-1.20-upstream.zip |
Adding upstream version 1.20.14.upstream/1.20.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/regexp/onepass_test.go')
-rw-r--r-- | src/regexp/onepass_test.go | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/src/regexp/onepass_test.go b/src/regexp/onepass_test.go new file mode 100644 index 0000000..6a42eda --- /dev/null +++ b/src/regexp/onepass_test.go @@ -0,0 +1,225 @@ +// Copyright 2014 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 ( + "reflect" + "regexp/syntax" + "strings" + "testing" +) + +var runeMergeTests = []struct { + left, right, merged []rune + next []uint32 + leftPC, rightPC uint32 +}{ + { + // empty rhs + []rune{69, 69}, + []rune{}, + []rune{69, 69}, + []uint32{1}, + 1, 2, + }, + { + // identical runes, identical targets + []rune{69, 69}, + []rune{69, 69}, + []rune{}, + []uint32{mergeFailed}, + 1, 1, + }, + { + // identical runes, different targets + []rune{69, 69}, + []rune{69, 69}, + []rune{}, + []uint32{mergeFailed}, + 1, 2, + }, + { + // append right-first + []rune{69, 69}, + []rune{71, 71}, + []rune{69, 69, 71, 71}, + []uint32{1, 2}, + 1, 2, + }, + { + // append, left-first + []rune{71, 71}, + []rune{69, 69}, + []rune{69, 69, 71, 71}, + []uint32{2, 1}, + 1, 2, + }, + { + // successful interleave + []rune{60, 60, 71, 71, 101, 101}, + []rune{69, 69, 88, 88}, + []rune{60, 60, 69, 69, 71, 71, 88, 88, 101, 101}, + []uint32{1, 2, 1, 2, 1}, + 1, 2, + }, + { + // left surrounds right + []rune{69, 74}, + []rune{71, 71}, + []rune{}, + []uint32{mergeFailed}, + 1, 2, + }, + { + // right surrounds left + []rune{69, 74}, + []rune{68, 75}, + []rune{}, + []uint32{mergeFailed}, + 1, 2, + }, + { + // overlap at interval begin + []rune{69, 74}, + []rune{74, 75}, + []rune{}, + []uint32{mergeFailed}, + 1, 2, + }, + { + // overlap ar interval end + []rune{69, 74}, + []rune{65, 69}, + []rune{}, + []uint32{mergeFailed}, + 1, 2, + }, + { + // overlap from above + []rune{69, 74}, + []rune{71, 74}, + []rune{}, + []uint32{mergeFailed}, + 1, 2, + }, + { + // overlap from below + []rune{69, 74}, + []rune{65, 71}, + []rune{}, + []uint32{mergeFailed}, + 1, 2, + }, + { + // out of order []rune + []rune{69, 74, 60, 65}, + []rune{66, 67}, + []rune{}, + []uint32{mergeFailed}, + 1, 2, + }, +} + +func TestMergeRuneSet(t *testing.T) { + for ix, test := range runeMergeTests { + merged, next := mergeRuneSets(&test.left, &test.right, test.leftPC, test.rightPC) + if !reflect.DeepEqual(merged, test.merged) { + t.Errorf("mergeRuneSet :%d (%v, %v) merged\n have\n%v\nwant\n%v", ix, test.left, test.right, merged, test.merged) + } + if !reflect.DeepEqual(next, test.next) { + t.Errorf("mergeRuneSet :%d(%v, %v) next\n have\n%v\nwant\n%v", ix, test.left, test.right, next, test.next) + } + } +} + +var onePassTests = []struct { + re string + isOnePass bool +}{ + {`^(?:a|(?:a*))$`, false}, + {`^(?:(a)|(?:a*))$`, false}, + {`^(?:(?:(?:.(?:$))?))$`, true}, + {`^abcd$`, true}, + {`^(?:(?:a{0,})*?)$`, false}, + {`^(?:(?:a+)*)$`, true}, + {`^(?:(?:a|(?:aa)))$`, true}, + {`^(?:[^\s\S])$`, true}, + {`^(?:(?:a{3,4}){0,})$`, false}, + {`^(?:(?:(?:a*)+))$`, true}, + {`^[a-c]+$`, true}, + {`^[a-c]*$`, true}, + {`^(?:a*)$`, true}, + {`^(?:(?:aa)|a)$`, true}, + {`^[a-c]*`, false}, + {`^...$`, true}, + {`^(?:a|(?:aa))$`, true}, + {`^a((b))c$`, true}, + {`^a.[l-nA-Cg-j]?e$`, true}, + {`^a((b))$`, true}, + {`^a(?:(b)|(c))c$`, true}, + {`^a(?:(b*)|(c))c$`, false}, + {`^a(?:b|c)$`, true}, + {`^a(?:b?|c)$`, true}, + {`^a(?:b?|c?)$`, false}, + {`^a(?:b?|c+)$`, true}, + {`^a(?:b+|(bc))d$`, false}, + {`^a(?:bc)+$`, true}, + {`^a(?:[bcd])+$`, true}, + {`^a((?:[bcd])+)$`, true}, + {`^a(:?b|c)*d$`, true}, + {`^.bc(d|e)*$`, true}, + {`^(?:(?:aa)|.)$`, false}, + {`^(?:(?:a{1,2}){1,2})$`, false}, + {`^l` + strings.Repeat("o", 2<<8) + `ng$`, true}, +} + +func TestCompileOnePass(t *testing.T) { + var ( + p *syntax.Prog + re *syntax.Regexp + err error + ) + for _, test := range onePassTests { + if re, err = syntax.Parse(test.re, syntax.Perl); err != nil { + t.Errorf("Parse(%q) got err:%s, want success", test.re, err) + continue + } + // needs to be done before compile... + re = re.Simplify() + if p, err = syntax.Compile(re); err != nil { + t.Errorf("Compile(%q) got err:%s, want success", test.re, err) + continue + } + isOnePass := compileOnePass(p) != nil + if isOnePass != test.isOnePass { + t.Errorf("CompileOnePass(%q) got isOnePass=%v, expected %v", test.re, isOnePass, test.isOnePass) + } + } +} + +// TODO(cespare): Unify with onePassTests and rationalize one-pass test cases. +var onePassTests1 = []struct { + re string + match string +}{ + {`^a(/b+(#c+)*)*$`, "a/b#c"}, // golang.org/issue/11905 +} + +func TestRunOnePass(t *testing.T) { + for _, test := range onePassTests1 { + re, err := Compile(test.re) + if err != nil { + t.Errorf("Compile(%q): got err: %s", test.re, err) + continue + } + if re.onepass == nil { + t.Errorf("Compile(%q): got nil, want one-pass", test.re) + continue + } + if !re.MatchString(test.match) { + t.Errorf("onepass %q did not match %q", test.re, test.match) + } + } +} |