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godot/modules/regex/tests/test_regex.h
toastedbreadandomelette b7de8e2c29
Add additional unit tests for RegEx
2024-04-10 23:24:27 +02:00

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/**************************************************************************/
/* test_regex.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifndef TEST_REGEX_H
#define TEST_REGEX_H
#include "../regex.h"
#include "core/string/ustring.h"
#include "tests/test_macros.h"
namespace TestRegEx {
TEST_CASE("[RegEx] Initialization") {
const String pattern = "(?<vowel>[aeiou])";
RegEx re1(pattern);
CHECK(re1.is_valid());
CHECK(re1.get_pattern() == pattern);
CHECK(re1.get_group_count() == 1);
PackedStringArray names = re1.get_names();
CHECK(names.size() == 1);
CHECK(names[0] == "vowel");
RegEx re2;
CHECK(re2.is_valid() == false);
CHECK(re2.compile(pattern) == OK);
CHECK(re2.is_valid());
CHECK(re1.get_pattern() == re2.get_pattern());
CHECK(re1.get_group_count() == re2.get_group_count());
names = re2.get_names();
CHECK(names.size() == 1);
CHECK(names[0] == "vowel");
}
TEST_CASE("[RegEx] Clearing") {
RegEx re("Godot");
REQUIRE(re.is_valid());
re.clear();
CHECK(re.is_valid() == false);
}
TEST_CASE("[RegEx] Searching") {
const String s = "Searching";
const String vowels = "[aeiou]{1,2}";
const String numerics = "\\d";
RegEx re(vowels);
REQUIRE(re.is_valid());
Ref<RegExMatch> match = re.search(s);
REQUIRE(match != nullptr);
CHECK(match->get_string(0) == "ea");
match = re.search(s, 1, 2);
REQUIRE(match != nullptr);
CHECK(match->get_string(0) == "e");
match = re.search(s, 2, 4);
REQUIRE(match != nullptr);
CHECK(match->get_string(0) == "a");
match = re.search(s, 3, 5);
CHECK(match == nullptr);
match = re.search(s, 6, 2);
CHECK(match == nullptr);
const Array all_results = re.search_all(s);
CHECK(all_results.size() == 2);
match = all_results[0];
REQUIRE(match != nullptr);
CHECK(match->get_string(0) == "ea");
match = all_results[1];
REQUIRE(match != nullptr);
CHECK(match->get_string(0) == "i");
CHECK(re.compile(numerics) == OK);
CHECK(re.is_valid());
CHECK(re.search(s) == nullptr);
CHECK(re.search_all(s).size() == 0);
}
TEST_CASE("[RegEx] Substitution") {
const String s1 = "Double all the vowels.";
RegEx re1("(?<vowel>[aeiou])");
REQUIRE(re1.is_valid());
CHECK(re1.sub(s1, "$0$vowel", true) == "Doouublee aall thee vooweels.");
const String s2 = "Substitution with group.";
RegEx re2("Substitution (.+)");
REQUIRE(re2.is_valid());
CHECK(re2.sub(s2, "Test ${1}") == "Test with group.");
const String s3 = "Useless substitution";
RegEx re3("Anything");
REQUIRE(re3.is_valid());
CHECK(re3.sub(s3, "Something") == "Useless substitution");
const String s4 = "acacac";
RegEx re4("(a)(b){0}(c)");
REQUIRE(re4.is_valid());
CHECK(re4.sub(s4, "${1}.${3}.", true) == "a.c.a.c.a.c.");
const String s5 = "aaaa";
RegEx re5("a");
REQUIRE(re5.is_valid());
CHECK(re5.sub(s5, "b", true, 0, 2) == "bbaa");
CHECK(re5.sub(s5, "b", true, 1, 3) == "abba");
CHECK(re5.sub(s5, "b", true, 0, 0) == "aaaa");
CHECK(re5.sub(s5, "b", true, 1, 1) == "aaaa");
CHECK(re5.sub(s5, "cc", true, 0, 2) == "ccccaa");
CHECK(re5.sub(s5, "cc", true, 1, 3) == "acccca");
CHECK(re5.sub(s5, "", true, 0, 2) == "aa");
}
TEST_CASE("[RegEx] Substitution with empty input and/or replacement") {
const String s1 = "";
const String s2 = "gogogo";
RegEx re1("");
REQUIRE(re1.is_valid());
CHECK(re1.sub(s1, "") == "");
CHECK(re1.sub(s1, "a") == "a");
CHECK(re1.sub(s2, "") == "gogogo");
RegEx re2("go");
REQUIRE(re2.is_valid());
CHECK(re2.sub(s2, "") == "gogo");
CHECK(re2.sub(s2, "", true) == "");
}
TEST_CASE("[RegEx] Uninitialized use") {
const String s = "Godot";
RegEx re;
ERR_PRINT_OFF;
CHECK(re.search(s) == nullptr);
CHECK(re.search_all(s).size() == 0);
CHECK(re.sub(s, "") == "");
CHECK(re.get_group_count() == 0);
CHECK(re.get_names().size() == 0);
ERR_PRINT_ON
}
TEST_CASE("[RegEx] Empty pattern") {
const String s = "Godot";
RegEx re;
CHECK(re.compile("") == OK);
CHECK(re.is_valid());
}
TEST_CASE("[RegEx] Complex Grouping") {
const String test = "https://docs.godotengine.org/en/latest/contributing/";
// Ignored protocol in grouping.
RegEx re("^(?:https?://)([a-zA-Z]{2,4})\\.([a-zA-Z][a-zA-Z0-9_\\-]{2,64})\\.([a-zA-Z]{2,4})");
REQUIRE(re.is_valid());
Ref<RegExMatch> expr = re.search(test);
CHECK(expr->get_group_count() == 3);
CHECK(expr->get_string(0) == "https://docs.godotengine.org");
CHECK(expr->get_string(1) == "docs");
CHECK(expr->get_string(2) == "godotengine");
CHECK(expr->get_string(3) == "org");
}
TEST_CASE("[RegEx] Number Expression") {
const String test = "(2.5e-3 + 35 + 46) / 2.8e0 = 28.9294642857";
// Not an exact regex for number but a good test.
RegEx re("([+-]?\\d+)(\\.\\d+([eE][+-]?\\d+)?)?");
REQUIRE(re.is_valid());
Array number_match = re.search_all(test);
CHECK(number_match.size() == 5);
Ref<RegExMatch> number = number_match[0];
CHECK(number->get_string(0) == "2.5e-3");
CHECK(number->get_string(1) == "2");
number = number_match[1];
CHECK(number->get_string(0) == "35");
number = number_match[2];
CHECK(number->get_string(0) == "46");
number = number_match[3];
CHECK(number->get_string(0) == "2.8e0");
number = number_match[4];
CHECK(number->get_string(0) == "28.9294642857");
CHECK(number->get_string(1) == "28");
CHECK(number->get_string(2) == ".9294642857");
}
TEST_CASE("[RegEx] Invalid end position") {
const String s = "Godot";
RegEx re("o");
REQUIRE(re.is_valid());
Ref<RegExMatch> match = re.search(s, 0, 10);
CHECK(match->get_string(0) == "o");
const Array all_results = re.search_all(s, 0, 10);
CHECK(all_results.size() == 2);
match = all_results[0];
REQUIRE(match != nullptr);
CHECK(match->get_string(0) == String("o"));
match = all_results[1];
REQUIRE(match != nullptr);
CHECK(match->get_string(0) == String("o"));
CHECK(re.sub(s, "", true, 0, 10) == "Gdt");
}
TEST_CASE("[RegEx] Get match string list") {
const String s = "Godot Engine";
RegEx re("(Go)(dot)");
Ref<RegExMatch> match = re.search(s);
REQUIRE(match != nullptr);
PackedStringArray result;
result.append("Godot");
result.append("Go");
result.append("dot");
CHECK(match->get_strings() == result);
}
TEST_CASE("[RegEx] Match start and end positions") {
const String s = "Whole pattern";
RegEx re1("pattern");
REQUIRE(re1.is_valid());
Ref<RegExMatch> match = re1.search(s);
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 6);
CHECK(match->get_end(0) == 13);
RegEx re2("(?<vowel>[aeiou])");
REQUIRE(re2.is_valid());
match = re2.search(s);
REQUIRE(match != nullptr);
CHECK(match->get_start("vowel") == 2);
CHECK(match->get_end("vowel") == 3);
}
TEST_CASE("[RegEx] Asterisk search all") {
const String s = "Godot Engine";
RegEx re("o*");
REQUIRE(re.is_valid());
Ref<RegExMatch> match;
const Array all_results = re.search_all(s);
CHECK(all_results.size() == 13);
match = all_results[0];
CHECK(match->get_string(0) == "");
match = all_results[1];
CHECK(match->get_string(0) == "o");
match = all_results[2];
CHECK(match->get_string(0) == "");
match = all_results[3];
CHECK(match->get_string(0) == "o");
for (int i = 4; i < 13; i++) {
match = all_results[i];
CHECK(match->get_string(0) == "");
}
}
TEST_CASE("[RegEx] Simple lookahead") {
const String s = "Godot Engine";
RegEx re("o(?=t)");
REQUIRE(re.is_valid());
Ref<RegExMatch> match = re.search(s);
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 3);
CHECK(match->get_end(0) == 4);
}
TEST_CASE("[RegEx] Lookahead groups empty matches") {
const String s = "12";
RegEx re("(?=(\\d+))");
REQUIRE(re.is_valid());
Ref<RegExMatch> match = re.search(s);
CHECK(match->get_string(0) == "");
CHECK(match->get_string(1) == "12");
const Array all_results = re.search_all(s);
CHECK(all_results.size() == 2);
match = all_results[0];
REQUIRE(match != nullptr);
CHECK(match->get_string(0) == String(""));
CHECK(match->get_string(1) == String("12"));
match = all_results[1];
REQUIRE(match != nullptr);
CHECK(match->get_string(0) == String(""));
CHECK(match->get_string(1) == String("2"));
}
TEST_CASE("[RegEx] Simple lookbehind") {
const String s = "Godot Engine";
RegEx re("(?<=d)o");
REQUIRE(re.is_valid());
Ref<RegExMatch> match = re.search(s);
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 3);
CHECK(match->get_end(0) == 4);
}
TEST_CASE("[RegEx] Simple lookbehind search all") {
const String s = "ababbaabab";
RegEx re("(?<=a)b");
REQUIRE(re.is_valid());
const Array all_results = re.search_all(s);
CHECK(all_results.size() == 4);
Ref<RegExMatch> match = all_results[0];
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 1);
CHECK(match->get_end(0) == 2);
match = all_results[1];
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 3);
CHECK(match->get_end(0) == 4);
match = all_results[2];
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 7);
CHECK(match->get_end(0) == 8);
match = all_results[3];
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 9);
CHECK(match->get_end(0) == 10);
}
TEST_CASE("[RegEx] Lookbehind groups empty matches") {
const String s = "abaaabab";
RegEx re("(?<=(b))");
REQUIRE(re.is_valid());
Ref<RegExMatch> match;
const Array all_results = re.search_all(s);
CHECK(all_results.size() == 3);
match = all_results[0];
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 2);
CHECK(match->get_end(0) == 2);
CHECK(match->get_start(1) == 1);
CHECK(match->get_end(1) == 2);
CHECK(match->get_string(0) == String(""));
CHECK(match->get_string(1) == String("b"));
match = all_results[1];
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 6);
CHECK(match->get_end(0) == 6);
CHECK(match->get_start(1) == 5);
CHECK(match->get_end(1) == 6);
CHECK(match->get_string(0) == String(""));
CHECK(match->get_string(1) == String("b"));
match = all_results[2];
REQUIRE(match != nullptr);
CHECK(match->get_start(0) == 8);
CHECK(match->get_end(0) == 8);
CHECK(match->get_start(1) == 7);
CHECK(match->get_end(1) == 8);
CHECK(match->get_string(0) == String(""));
CHECK(match->get_string(1) == String("b"));
}
} // namespace TestRegEx
#endif // TEST_REGEX_H
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