www-lib-markdown/phptest/BrokenSyntaxTests.php

<?php
declare(strict_types=1);

use PHPUnit\Framework\TestCase;

require_once __DIR__ . '/../php/markdown.php';

final class BrokenSyntaxTests extends TestCase {
	private ?Markdown $parser = null;

	protected function setUp(): void {
		parent::setUp();
		$this->parser = Markdown::completeParser();
	}

	private function iterateCharacters(string $markdown) {
		for ($i = 1; $i < mb_strlen($markdown); $i++) {
			$portion = mb_substr($markdown, 0, $i);
			try {
				$this->parser->toHTML($portion);
			} catch (Error $e) {
				print("Broken portion is:\n\"{$portion}\"\n");
				throw $e;
			}
		}
	}

	public function test_brokenSyntax() {
		// Just try a bunch of broken syntax and make sure no exceptions are
		// thrown or infinite loops triggered. Don't care about what's rendered
		// as most of these are incomplete or invalid syntax.
		$this->iterateCharacters("# ");
		$this->iterateCharacters("## ");
		$this->iterateCharacters("Underlined\n-");
		$this->iterateCharacters("* ");
		$this->iterateCharacters(" * A");
		$this->iterateCharacters("- A");
		$this->iterateCharacters(" - A");
		$this->iterateCharacters("+ A");
		$this->iterateCharacters(" + A");
		$this->iterateCharacters("1. A");
		$this->iterateCharacters(" 1. A");
		$this->iterateCharacters("1. A\n 1. B\n 2. C\n2. D");
		$this->iterateCharacters("> A");
		$this->iterateCharacters("> \nA");
		$this->iterateCharacters("> \n>");
		$this->iterateCharacters(">>");
		$this->iterateCharacters("> > A");
		$this->iterateCharacters("> \n> A");
		$this->iterateCharacters("> > \n> A");
		$this->iterateCharacters("```\ncode\n```");
		$this->iterateCharacters("```java\ncode\n```");
		$this->iterateCharacters("    code\n    code\n\n");
		$this->iterateCharacters("------");
		$this->iterateCharacters("  -  -    - --*");
		$this->iterateCharacters("Header|Header\n--|--\nCell|Cell");
		$this->iterateCharacters("Header\n--|--\nCell");
		$this->iterateCharacters("|Header|\n|-|\n|Cell|");
		$this->iterateCharacters("|Header|\n|--|--|--|\n|Cell|");
		$this->iterateCharacters("|Header|Header|\n|--|\n|Cell|Cell|");
		$this->iterateCharacters("|Header|\n|:-|\n|Cell|");
		$this->iterateCharacters("|Header|\n|:-:|\n|Cell|");
		$this->iterateCharacters("|Header|\n|-:|\n|Cell|");
		$this->iterateCharacters("term\n: definition\nterm\n: definition");
		$this->iterateCharacters("term\n:definition\nterm\n:definition");
		$this->iterateCharacters("HTML\n\n*[HTML]: Hypertext");
		$this->iterateCharacters("HTML\n*[HTML]: Hypertext");
		$this->iterateCharacters("*[HTML]: Hypertext\nHTML");
		$this->iterateCharacters("---{.foo}\n");
		$this->iterateCharacters("---{#foo}\n");
		$this->iterateCharacters("---{.foo #foo lang=en}\n");
		$this->iterateCharacters("lorem *ipsum* dolor *sit* amet");
		$this->iterateCharacters("*lorem* ipsum *dolor* sit *amet*");
		$this->iterateCharacters("*lorem *ipsum *dolor*** sit");
		$this->iterateCharacters("***lorem* ipsum* dolor* sit");
		$this->iterateCharacters("lorem _ipsum_ dolor _sit_ amet");
		$this->iterateCharacters("_lorem_ ipsum _dolor_ sit _amet_");
		$this->iterateCharacters("_lorem _ipsum _dolor___ sit");
		$this->iterateCharacters("___lorem_ ipsum_ dolor_ sit");
		$this->iterateCharacters("lorem **ipsum** dolor **sit** amet");
		$this->iterateCharacters("**lorem** ipsum **dolor** sit **amet**");
		$this->iterateCharacters("**lorem **ipsum **dolor****** sit");
		$this->iterateCharacters("******lorem** ipsum** dolor** sit");
		$this->iterateCharacters("lorem __ipsum__ dolor __sit__ amet");
		$this->iterateCharacters("__lorem__ ipsum __dolor__ sit __amet__");
		$this->iterateCharacters("lorem __ipsum__ dolor __sit__ amet");
		$this->iterateCharacters("__lorem __ipsum __dolor______ sit");
		$this->iterateCharacters("______lorem__ ipsum__ dolor__ sit");
		$this->iterateCharacters("*_**`~~^==!__~*^!``**-+!**`==!~_^**``_");
		$this->iterateCharacters("[link[(index.html(");
		$this->iterateCharacters("[link[](index.html()");
		$this->iterateCharacters("[link]](index.html))");
		$this->iterateCharacters("[[link]((index.html)");
		$this->iterateCharacters("]link])index.html)");
		$this->iterateCharacters("[ link ] ( index.html )");
		$this->iterateCharacters("(user@example.com)");
		$this->iterateCharacters("(https://user@example.com)");
		$this->iterateCharacters("(index.html \"title\")");
		$this->iterateCharacters("(index.html \"title)");
		$this->iterateCharacters("(index.html title\")");
		$this->iterateCharacters("(index.html title)");
		$this->iterateCharacters("![alt][image.jpg]");
		$this->iterateCharacters("![alt[](image.jpg()");
		$this->iterateCharacters("! [alt](image.jpg)");
		$this->iterateCharacters("!(image.jpg)");
		$this->iterateCharacters("[][]]][][[][][][[][[]][][][][][[[]]]][]][][");
		$this->iterateCharacters("())())()()()(())(()((())))(()((()");
		$this->iterateCharacters("<https://example.com>");
		$this->iterateCharacters("<<https://example.com>");
		$this->iterateCharacters("<https://example.com>>");
		$this->iterateCharacters("[link][ref]\n\n[ref]: page.html");
		$this->iterateCharacters("[link][ref]\n[ref]: page.html");
		$this->iterateCharacters("[link][ref]\n\n[ref]:page.html");
		$this->iterateCharacters("[ref]: page.html\n\n[link][ref]");
		$this->iterateCharacters("[link][ref]\n\n[ref]: page.html \"title\"");
		$this->iterateCharacters("[link][ref]\n\n[ref]: page.html title");
		$this->iterateCharacters("Lorem[^1] ipsum[^abc] dolor[^-1]\n\n[^abc]: def\n[^1]: def\n[^-1]: def\n[^abc]: def");
		$this->iterateCharacters("Lorem[^1]\n\n[^2]: def");
		$this->iterateCharacters("[^1]] [[^2] [^3]] [[^4]] ]^5[");
		$this->iterateCharacters("[^1]: Def\n\nLorem[^1]");
		$this->iterateCharacters("[^1]: Def\n\nLorem[^2]");
		$this->iterateCharacters("Lorem <foo> ipsum");
		$this->iterateCharacters("Lorem <span> ipsum");
		$this->iterateCharacters("Lorem <span class=\"foo\" id=\"foo\" lang=\"en\"> ipsum");
		$this->iterateCharacters("Lorem </span> ipsum");
		$this->iterateCharacters("Lorem </span foo=\"bar\">");
		$this->iterateCharacters("Lorem <span foo='bar' baz=ipsum dolor> sit");
		$this->iterateCharacters("\\*\\\\*\\\\\\*\\\\\\\\*\\*");
		$this->assertTrue(true); // to suppress risky test warning
	}
}
?>