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https://github.com/LadybirdBrowser/ladybird.git
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dbef2b1ee9
This also adds support for lookarounds and individually-negated comparisons. The only unimplemented part of the parser spec is the unicode stuff.
550 lines
17 KiB
C++
550 lines
17 KiB
C++
/*
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* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/TestSuite.h> // import first, to prevent warning of ASSERT* redefinition
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#include <AK/StringBuilder.h>
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#include <LibRegex/Regex.h>
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#include <LibRegex/RegexDebug.h>
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#include <stdio.h>
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static ECMAScriptOptions match_test_api_options(const ECMAScriptOptions options)
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{
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return options;
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}
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static PosixOptions match_test_api_options(const PosixOptions options)
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{
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return options;
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}
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TEST_CASE(regex_options_ecmascript)
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{
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ECMAScriptOptions eo;
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eo |= ECMAScriptFlags::Global;
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EXPECT(eo & ECMAScriptFlags::Global);
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EXPECT(!(eo & ECMAScriptFlags::Insensitive));
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eo = match_test_api_options(ECMAScriptFlags::Global | ECMAScriptFlags::Insensitive | ECMAScriptFlags::Sticky);
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EXPECT(eo & ECMAScriptFlags::Global);
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EXPECT(eo & ECMAScriptFlags::Insensitive);
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EXPECT(eo & ECMAScriptFlags::Sticky);
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EXPECT(!(eo & ECMAScriptFlags::Unicode));
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EXPECT(!(eo & ECMAScriptFlags::Multiline));
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EXPECT(!(eo & ECMAScriptFlags::SingleLine));
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eo &= ECMAScriptFlags::Insensitive;
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EXPECT(!(eo & ECMAScriptFlags::Global));
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EXPECT(eo & ECMAScriptFlags::Insensitive);
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EXPECT(!(eo & ECMAScriptFlags::Multiline));
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eo &= ECMAScriptFlags::Sticky;
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EXPECT(!(eo & ECMAScriptFlags::Global));
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EXPECT(!(eo & ECMAScriptFlags::Insensitive));
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EXPECT(!(eo & ECMAScriptFlags::Multiline));
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EXPECT(!(eo & ECMAScriptFlags::Sticky));
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eo = ~ECMAScriptFlags::Insensitive;
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EXPECT(eo & ECMAScriptFlags::Global);
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EXPECT(!(eo & ECMAScriptFlags::Insensitive));
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EXPECT(eo & ECMAScriptFlags::Multiline);
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EXPECT(eo & ECMAScriptFlags::Sticky);
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}
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TEST_CASE(regex_options_posix)
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{
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PosixOptions eo;
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eo |= PosixFlags::Global;
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EXPECT(eo & PosixFlags::Global);
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EXPECT(!(eo & PosixFlags::Insensitive));
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eo = match_test_api_options(PosixFlags::Global | PosixFlags::Insensitive | PosixFlags::MatchNotBeginOfLine);
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EXPECT(eo & PosixFlags::Global);
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EXPECT(eo & PosixFlags::Insensitive);
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EXPECT(eo & PosixFlags::MatchNotBeginOfLine);
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EXPECT(!(eo & PosixFlags::Unicode));
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EXPECT(!(eo & PosixFlags::Multiline));
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eo &= PosixFlags::Insensitive;
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EXPECT(!(eo & PosixFlags::Global));
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EXPECT(eo & PosixFlags::Insensitive);
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EXPECT(!(eo & PosixFlags::Multiline));
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eo &= PosixFlags::MatchNotBeginOfLine;
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EXPECT(!(eo & PosixFlags::Global));
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EXPECT(!(eo & PosixFlags::Insensitive));
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EXPECT(!(eo & PosixFlags::Multiline));
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eo = ~PosixFlags::Insensitive;
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EXPECT(eo & PosixFlags::Global);
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EXPECT(!(eo & PosixFlags::Insensitive));
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EXPECT(eo & PosixFlags::Multiline);
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}
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TEST_CASE(regex_lexer)
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{
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Lexer l("/[.*+?^${}()|[\\]\\\\]/g");
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EXPECT(l.next().type() == regex::TokenType::Slash);
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EXPECT(l.next().type() == regex::TokenType::LeftBracket);
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EXPECT(l.next().type() == regex::TokenType::Period);
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EXPECT(l.next().type() == regex::TokenType::Asterisk);
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EXPECT(l.next().type() == regex::TokenType::Plus);
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EXPECT(l.next().type() == regex::TokenType::Questionmark);
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EXPECT(l.next().type() == regex::TokenType::Circumflex);
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EXPECT(l.next().type() == regex::TokenType::Dollar);
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EXPECT(l.next().type() == regex::TokenType::LeftCurly);
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EXPECT(l.next().type() == regex::TokenType::RightCurly);
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EXPECT(l.next().type() == regex::TokenType::LeftParen);
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EXPECT(l.next().type() == regex::TokenType::RightParen);
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EXPECT(l.next().type() == regex::TokenType::Pipe);
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EXPECT(l.next().type() == regex::TokenType::LeftBracket);
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EXPECT(l.next().type() == regex::TokenType::EscapeSequence);
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EXPECT(l.next().type() == regex::TokenType::EscapeSequence);
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EXPECT(l.next().type() == regex::TokenType::RightBracket);
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EXPECT(l.next().type() == regex::TokenType::Slash);
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EXPECT(l.next().type() == regex::TokenType::Char);
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}
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TEST_CASE(parser_error_parens)
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{
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String pattern = "test()test";
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Lexer l(pattern);
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PosixExtendedParser p(l);
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::EmptySubExpression);
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}
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TEST_CASE(parser_error_special_characters_used_at_wrong_place)
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{
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String pattern;
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Vector<char, 5> chars = { '*', '+', '?', '{' };
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StringBuilder b;
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Lexer l;
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PosixExtended p(l);
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for (auto& ch : chars) {
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// First in ere
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b.clear();
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b.append(ch);
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pattern = b.build();
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l.set_source(pattern);
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::InvalidRepetitionMarker);
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// After vertical line
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b.clear();
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b.append("a|");
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b.append(ch);
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pattern = b.build();
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l.set_source(pattern);
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::InvalidRepetitionMarker);
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// After circumflex
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b.clear();
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b.append("^");
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b.append(ch);
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pattern = b.build();
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l.set_source(pattern);
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::InvalidRepetitionMarker);
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// After dollar
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b.clear();
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b.append("$");
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b.append(ch);
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pattern = b.build();
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l.set_source(pattern);
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::InvalidRepetitionMarker);
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// After left parens
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b.clear();
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b.append("(");
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b.append(ch);
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b.append(")");
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pattern = b.build();
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l.set_source(pattern);
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::InvalidRepetitionMarker);
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}
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}
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TEST_CASE(parser_error_vertical_line_used_at_wrong_place)
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{
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Lexer l;
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PosixExtended p(l);
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// First in ere
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l.set_source("|asdf");
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::EmptySubExpression);
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// Last in ere
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l.set_source("asdf|");
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::EmptySubExpression);
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// After left parens
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l.set_source("(|asdf)");
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::EmptySubExpression);
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// Proceed right parens
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l.set_source("(asdf)|");
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p.parse();
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EXPECT(p.has_error());
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EXPECT(p.error() == Error::EmptySubExpression);
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}
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TEST_CASE(catch_all_first)
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{
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Regex<PosixExtended> re("^.*$");
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RegexResult m;
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re.match("Hello World", m);
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EXPECT(m.count == 1);
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EXPECT(re.match("Hello World", m));
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}
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TEST_CASE(catch_all)
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{
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Regex<PosixExtended> re("^.*$", PosixFlags::Global);
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EXPECT(re.has_match("Hello World"));
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EXPECT(re.match("Hello World").success);
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EXPECT(re.match("Hello World").count == 1);
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EXPECT(has_match("Hello World", re));
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auto res = match("Hello World", re);
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EXPECT(res.success);
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EXPECT(res.count == 1);
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EXPECT(res.matches.size() == 1);
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EXPECT(res.matches.first().view == "Hello World");
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}
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TEST_CASE(catch_all_again)
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{
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Regex<PosixExtended> re("^.*$", PosixFlags::Extra);
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EXPECT_EQ(has_match("Hello World", re), true);
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}
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TEST_CASE(char_utf8)
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{
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Regex<PosixExtended> re("😀");
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RegexResult result;
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EXPECT_EQ((result = match("Привет, мир! 😀 γειά σου κόσμος 😀 こんにちは世界", re, PosixFlags::Global)).success, true);
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EXPECT_EQ(result.count, 2u);
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}
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TEST_CASE(catch_all_newline)
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{
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Regex<PosixExtended> re("^.*$", PosixFlags::Multiline | PosixFlags::StringCopyMatches);
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RegexResult result;
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auto lambda = [&result, &re]() {
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String aaa = "Hello World\nTest\n1234\n";
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result = match(aaa, re);
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EXPECT_EQ(result.success, true);
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};
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lambda();
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EXPECT_EQ(result.count, 3u);
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EXPECT_EQ(result.matches.at(0).view, "Hello World");
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EXPECT_EQ(result.matches.at(1).view, "Test");
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EXPECT_EQ(result.matches.at(2).view, "1234");
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}
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TEST_CASE(catch_all_newline_view)
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{
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Regex<PosixExtended> re("^.*$", PosixFlags::Multiline);
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RegexResult result;
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String aaa = "Hello World\nTest\n1234\n";
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result = match(aaa, re);
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EXPECT_EQ(result.success, true);
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EXPECT_EQ(result.count, 3u);
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String str = "Hello World";
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EXPECT_EQ(result.matches.at(0).view, str.view());
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EXPECT_EQ(result.matches.at(1).view, "Test");
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EXPECT_EQ(result.matches.at(2).view, "1234");
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}
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TEST_CASE(catch_all_newline_2)
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{
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Regex<PosixExtended> re("^.*$");
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RegexResult result;
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result = match("Hello World\nTest\n1234\n", re, PosixFlags::Multiline | PosixFlags::StringCopyMatches);
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EXPECT_EQ(result.success, true);
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EXPECT_EQ(result.count, 3u);
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EXPECT_EQ(result.matches.at(0).view, "Hello World");
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EXPECT_EQ(result.matches.at(1).view, "Test");
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EXPECT_EQ(result.matches.at(2).view, "1234");
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result = match("Hello World\nTest\n1234\n", re);
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EXPECT_EQ(result.success, true);
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EXPECT_EQ(result.count, 1u);
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EXPECT_EQ(result.matches.at(0).view, "Hello World\nTest\n1234\n");
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}
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TEST_CASE(match_all_character_class)
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{
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Regex<PosixExtended> re("[[:alpha:]]");
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String str = "[Window]\nOpacity=255\nAudibleBeep=0\n";
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RegexResult result = match(str, re, PosixFlags::Global | PosixFlags::StringCopyMatches);
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EXPECT_EQ(result.success, true);
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EXPECT_EQ(result.count, 24u);
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EXPECT_EQ(result.matches.at(0).view, "W");
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EXPECT_EQ(result.matches.at(1).view, "i");
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EXPECT_EQ(result.matches.at(2).view, "n");
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EXPECT(&result.matches.at(0).view.characters_without_null_termination()[0] != &str.view().characters_without_null_termination()[1]);
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}
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TEST_CASE(match_character_class_with_assertion)
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{
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Regex<PosixExtended> re("[[:alpha:]]+$");
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String str = "abcdef";
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RegexResult result = match(str, re);
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EXPECT_EQ(result.success, true);
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EXPECT_EQ(result.count, 1u);
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}
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TEST_CASE(example_for_git_commit)
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{
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Regex<PosixExtended> re("^.*$");
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auto result = re.match("Well, hello friends!\nHello World!");
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EXPECT(result.success);
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EXPECT(result.count == 1);
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EXPECT(result.matches.at(0).view.starts_with("Well"));
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EXPECT(result.matches.at(0).view.length() == 33);
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EXPECT(re.has_match("Well,...."));
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result = re.match("Well, hello friends!\nHello World!", PosixFlags::Multiline);
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EXPECT(result.success);
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EXPECT(result.count == 2);
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EXPECT(result.matches.at(0).view == "Well, hello friends!");
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EXPECT(result.matches.at(1).view == "Hello World!");
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}
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TEST_CASE(email_address)
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{
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Regex<PosixExtended> re("^[A-Z0-9a-z._%+-]{1,64}@([A-Za-z0-9-]{1,63}\\.){1,125}[A-Za-z]{2,63}$");
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EXPECT(re.has_match("hello.world@domain.tld"));
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EXPECT(re.has_match("this.is.a.very_long_email_address@world.wide.web"));
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}
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TEST_CASE(ini_file_entries)
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{
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Regex<PosixExtended> re("[[:alpha:]]*=([[:digit:]]*)|\\[(.*)\\]");
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RegexResult result;
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#ifdef REGEX_DEBUG
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RegexDebug regex_dbg(stderr);
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regex_dbg.print_raw_bytecode(re);
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regex_dbg.print_header();
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regex_dbg.print_bytecode(re);
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#endif
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String haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
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EXPECT_EQ(re.search(haystack.view(), result, PosixFlags::Multiline), true);
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EXPECT_EQ(result.count, 3u);
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#ifdef REGEX_DEBUG
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for (auto& v : result.matches)
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fprintf(stderr, "%s\n", v.view.to_string().characters());
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#endif
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EXPECT_EQ(result.matches.at(0).view, "[Window]");
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EXPECT_EQ(result.capture_group_matches.at(0).at(0).view, "Window");
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EXPECT_EQ(result.matches.at(1).view, "Opacity=255");
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EXPECT_EQ(result.matches.at(1).line, 1u);
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EXPECT_EQ(result.matches.at(1).column, 0u);
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EXPECT_EQ(result.capture_group_matches.at(1).at(0).view, "255");
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EXPECT_EQ(result.capture_group_matches.at(1).at(0).line, 1u);
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EXPECT_EQ(result.capture_group_matches.at(1).at(0).column, 8u);
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EXPECT_EQ(result.matches.at(2).view, "AudibleBeep=0");
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EXPECT_EQ(result.capture_group_matches.at(2).at(0).view, "0");
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EXPECT_EQ(result.capture_group_matches.at(2).at(0).line, 2u);
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EXPECT_EQ(result.capture_group_matches.at(2).at(0).column, 12u);
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}
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TEST_CASE(ini_file_entries2)
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{
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Regex<PosixExtended> re("[[:alpha:]]*=([[:digit:]]*)");
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RegexResult result;
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String haystack = "ViewMode=Icon";
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EXPECT_EQ(re.match(haystack.view(), result), false);
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EXPECT_EQ(result.count, 0u);
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EXPECT_EQ(re.search(haystack.view(), result), true);
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EXPECT_EQ(result.count, 1u);
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}
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TEST_CASE(named_capture_group)
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{
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Regex<PosixExtended> re("[[:alpha:]]*=(?<Test>[[:digit:]]*)");
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RegexResult result;
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#ifdef REGEX_DEBUG
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RegexDebug regex_dbg(stderr);
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regex_dbg.print_raw_bytecode(re);
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regex_dbg.print_header();
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regex_dbg.print_bytecode(re);
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#endif
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String haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
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EXPECT_EQ(re.search(haystack, result, PosixFlags::Multiline), true);
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EXPECT_EQ(result.count, 2u);
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EXPECT_EQ(result.matches.at(0).view, "Opacity=255");
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EXPECT_EQ(result.named_capture_group_matches.at(0).ensure("Test").view, "255");
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EXPECT_EQ(result.matches.at(1).view, "AudibleBeep=0");
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EXPECT_EQ(result.named_capture_group_matches.at(1).ensure("Test").view, "0");
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}
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TEST_CASE(a_star)
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{
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Regex<PosixExtended> re("a*");
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RegexResult result;
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#ifdef REGEX_DEBUG
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RegexDebug regex_dbg(stderr);
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regex_dbg.print_raw_bytecode(re);
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regex_dbg.print_header();
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regex_dbg.print_bytecode(re);
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#endif
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String haystack = "[Window]\nOpacity=255\nAudibleBeep=0\n";
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EXPECT_EQ(re.search(haystack.view(), result, PosixFlags::Multiline), true);
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EXPECT_EQ(result.count, 32u);
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EXPECT_EQ(result.matches.at(0).view.length(), 0u);
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EXPECT_EQ(result.matches.at(10).view.length(), 1u);
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EXPECT_EQ(result.matches.at(10).view, "a");
|
||
EXPECT_EQ(result.matches.at(31).view.length(), 0u);
|
||
}
|
||
|
||
TEST_CASE(simple_period_end_benchmark)
|
||
{
|
||
Regex<PosixExtended> re("hello.$");
|
||
RegexResult m;
|
||
EXPECT_EQ(re.search("Hello1", m), false);
|
||
EXPECT_EQ(re.search("hello1hello1", m), true);
|
||
EXPECT_EQ(re.search("hello2hell", m), false);
|
||
EXPECT_EQ(re.search("hello?", m), true);
|
||
}
|
||
|
||
TEST_CASE(ECMA262_parse)
|
||
{
|
||
constexpr const char* patterns[] {
|
||
"^hello.$",
|
||
"^(hello.)$",
|
||
"^h{0,1}ello.$",
|
||
"^hello\\W$",
|
||
"^hell\\w.$",
|
||
"^hell\\x6f1$", // ^hello1$
|
||
"^hel(?:l\\w).$",
|
||
"^hel(?<LO>l\\w).$",
|
||
"^[-a-zA-Z\\w\\s]+$",
|
||
"\\bhello\\B",
|
||
};
|
||
|
||
for (auto& pattern : patterns) {
|
||
Regex<ECMA262> re(pattern);
|
||
EXPECT_EQ(re.parser_result.error, Error::NoError);
|
||
#ifdef REGEX_DEBUG
|
||
dbg() << "\n";
|
||
RegexDebug regex_dbg(stderr);
|
||
regex_dbg.print_raw_bytecode(re);
|
||
regex_dbg.print_header();
|
||
regex_dbg.print_bytecode(re);
|
||
dbg() << "\n";
|
||
#endif
|
||
}
|
||
}
|
||
|
||
TEST_CASE(ECMA262_match)
|
||
{
|
||
struct _test {
|
||
const char* pattern;
|
||
const char* subject;
|
||
bool matches { true };
|
||
ECMAScriptFlags options {};
|
||
};
|
||
|
||
constexpr _test tests[] {
|
||
{ "^hello.$", "hello1" },
|
||
{ "^(hello.)$", "hello1" },
|
||
{ "^h{0,1}ello.$", "ello1" },
|
||
{ "^hello\\W$", "hello!" },
|
||
{ "^hell\\w.$", "hellx!" },
|
||
{ "^hell\\x6f1$", "hello1" },
|
||
{ "^hel(?<LO>l.)1$", "hello1" },
|
||
{ "^hel(?<LO>l.)1*\\k<LO>.$", "hello1lo1" },
|
||
{ "^[-a-z1-3\\s]+$", "hell2 o1" },
|
||
{ .pattern = "\\bhello\\B", .subject = "hello1", .options = ECMAScriptFlags::Global },
|
||
{ "\\b.*\\b", "hello1" },
|
||
{ "[^\\D\\S]{2}", "1 " },
|
||
{ "bar(?=f.)foo", "barfoo" },
|
||
{ "bar(?=foo)bar", "barbar", false },
|
||
{ "bar(?!foo)bar", "barbar", true },
|
||
{ "bar(?!bar)bar", "barbar", false },
|
||
{ "bar.*(?<=foo)", "barbar", false },
|
||
{ "bar.*(?<!foo)", "barbar", true },
|
||
{ "((...)X)+", "fooXbarXbazX", true },
|
||
};
|
||
|
||
for (auto& test : tests) {
|
||
Regex<ECMA262> re(test.pattern, test.options);
|
||
#ifdef REGEX_DEBUG
|
||
dbg() << "\n";
|
||
RegexDebug regex_dbg(stderr);
|
||
regex_dbg.print_raw_bytecode(re);
|
||
regex_dbg.print_header();
|
||
regex_dbg.print_bytecode(re);
|
||
dbg() << "\n";
|
||
#endif
|
||
EXPECT_EQ(re.parser_result.error, Error::NoError);
|
||
EXPECT_EQ(re.match(test.subject).success, test.matches);
|
||
}
|
||
}
|
||
|
||
TEST_MAIN(Regex)
|