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src/Markdig.Tests/MiscTests.cs
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using System.Text.RegularExpressions;
using Markdig.Extensions.AutoLinks;
using Markdig.Extensions.Tables;
using Markdig.Syntax;
using NUnit.Framework;
namespace Markdig.Tests;
public class MiscTests
{
[Test]
public void LinkWithInvalidNonAsciiDomainNameIsIgnored()
{
// Url from https://github.com/lunet-io/markdig/issues/438
_ = Markdown.ToHtml("[minulém díle](http://V%20minulém%20díle%20jsme%20nainstalovali%20SQL%20Server,%20který%20je%20nutný%20pro%20běh%20Configuration%20Manageru.%20Dnes%20nás%20čeká%20instalace%20WSUS,%20což%20je%20produkt,%20jež%20je%20možné%20používat%20i%20jako%20samostatnou%20funkci%20ve%20Windows%20Serveru,%20který%20se%20stará%20o%20stažení%20a%20instalaci%20aktualizací%20z%20Microsoft%20Update%20na%20klientské%20počítače.%20Stejně%20jako%20v%20předchozích%20dílech,%20tak%20i%20v%20tomto%20si%20ukážeme%20obě%20varianty%20instalace%20–%20a%20to%20jak%20instalaci%20z%20PowerShellu,%20tak%20instalaci%20pomocí%20GUI.) ");
// Valid IDN
TestParser.TestSpec("[foo](http://ünicode.com)", "<p><a href=\"http://xn--nicode-2ya.com\">foo</a></p>");
TestParser.TestSpec("[foo](http://ünicode.ünicode.com)", "<p><a href=\"http://xn--nicode-2ya.xn--nicode-2ya.com\">foo</a></p>");
// Invalid IDN
TestParser.TestSpec("[foo](http://ünicode..com)", "<p><a href=\"http://%C3%BCnicode..com\">foo</a></p>");
}
[TestCase("link [foo [bar]]")] // https://spec.commonmark.org/0.29/#example-508
[TestCase("link [foo][bar]")]
[TestCase("link [][foo][bar][]")]
[TestCase("link [][foo][bar][[]]")]
[TestCase("link [foo] [bar]")]
[TestCase("link [[foo] [] [bar] [[abc]def]]")]
[TestCase("[]")]
[TestCase("[ ]")]
[TestCase("[bar][]")]
[TestCase("[bar][ foo]")]
[TestCase("[bar][foo ][]")]
[TestCase("[bar][fo[ ]o ][][]")]
[TestCase("[a]b[c[d[e]f]g]h")]
[TestCase("a[b[c[d]e]f[g]h]i foo [j]k[l[m]n]o")]
[TestCase("a[b[c[d]e]f[g]h]i[] [][foo][bar][] foo [j]k[l[m]n]o")]
[TestCase("a[b[c[d]e]f[g]h]i foo [j]k[l[m]n]o[][]")]
public void LinkTextMayContainBalancedBrackets(string linkText)
{
string markdown = $"[{linkText}](/uri)";
string expected = $@"<p><a href=""/uri"">{linkText}</a></p>";
TestParser.TestSpec(markdown, expected);
// Make the link text unbalanced
foreach (var bracketIndex in linkText
.Select((c, i) => new Tuple<char, int>(c, i))
.Where(t => t.Item1 == '[' || t.Item1 == ']')
.Select(t => t.Item2))
{
string brokenLinkText = linkText.Remove(bracketIndex, 1);
markdown = $"[{brokenLinkText}](/uri)";
expected = $@"<p><a href=""/uri"">{brokenLinkText}</a></p>";
string actual = Markdown.ToHtml(markdown);
Assert.AreNotEqual(expected, actual);
}
}
[Theory]
[TestCase('[', 9 * 1024, true, false)]
[TestCase('[', 11 * 1024, true, true)]
[TestCase('[', 100, false, false)]
[TestCase('[', 150, false, true)]
[TestCase('>', 100, true, false)]
[TestCase('>', 150, true, true)]
public void GuardsAgainstHighlyNestedNodes(char c, int count, bool parseOnly, bool shouldThrow)
{
var markdown = new string(c, count);
Action test = parseOnly ? () => Markdown.Parse(markdown) : () => Markdown.ToHtml(markdown);
if (shouldThrow)
{
Exception e = Assert.Throws<ArgumentException>(test);
Assert.True(e.Message.Contains("depth limit"));
}
else
{
test();
}
}
[Test]
public void MaximumNestingDepthCanBeRaisedForDeepListExtras()
{
var markdown = "Krankenhaus\nD. " + string.Join(" ", Enumerable.Repeat("M.", 160));
var pipeline = new MarkdownPipelineBuilder
{
MaximumNestingDepth = 512,
}.UseListExtras().Build();
Assert.DoesNotThrow(() => Markdown.ToHtml(markdown, pipeline));
}
[Test]
public void MaximumNestingDepthCanBeLowered()
{
var pipeline = new MarkdownPipelineBuilder
{
MaximumNestingDepth = 16,
}.Build();
Exception e = Assert.Throws<ArgumentException>(() => Markdown.ToHtml(new string('>', 20), pipeline));
Assert.True(e.Message.Contains("depth limit"));
}
[Test]
public void IsIssue356Corrected()
{
string input = @"https://foo.bar/path/\#m4mv5W0GYKZpGvfA.97";
string expected = @"<p><a href=""https://foo.bar/path/%5C#m4mv5W0GYKZpGvfA.97"">https://foo.bar/path/\#m4mv5W0GYKZpGvfA.97</a></p>";
TestParser.TestSpec($"<{input}>", expected);
TestParser.TestSpec(input, expected, "autolinks|advanced");
}
[Test]
public void IsIssue365Corrected()
{
// The scheme must be escaped too...
string input = "![image](\"onclick=\"alert&amp;#40;'click'&amp;#41;\"://)";
string expected = "<p><img src=\"%22onclick=%22alert&amp;#40;%27click%27&amp;#41;%22://\" alt=\"image\" /></p>";
TestParser.TestSpec(input, expected);
}
[Test]
public void TestAltTextIsCorrectlyEscaped()
{
TestParser.TestSpec(
@"![This is image alt text with quotation ' and double quotation ""hello"" world](girl.png)",
@"<p><img src=""girl.png"" alt=""This is image alt text with quotation ' and double quotation &quot;hello&quot; world"" /></p>");
}
[Test]
public void TestFixHang()
{
var input = File.ReadAllText(Path.Combine(TestParser.TestsDirectory, "hang.md"));
_ = Markdown.ToHtml(input);
}
[Test]
public void TestInvalidHtmlEntity()
{
var input = "9&ddr;&*&ddr;&de��__";
TestParser.TestSpec(input, "<p>9&amp;ddr;&amp;*&amp;ddr;&amp;de��__</p>");
}
[Test]
public void TestInvalidCharacterHandling()
{
var input = File.ReadAllText(Path.Combine(TestParser.TestsDirectory, "ArgumentOutOfRangeException.md"));
_ = Markdown.ToHtml(input);
}
[Test]
public void TestInvalidCodeEscape()
{
var input = "```**Header** ";
_ = Markdown.ToHtml(input);
}
[Test]
public void TestEmphasisAndHtmlEntity()
{
var markdownText = "*Unlimited-Fun&#174;*&#174;";
TestParser.TestSpec(markdownText, "<p><em>Unlimited-Fun®</em>®</p>");
}
[Test]
public void TestThematicInsideCodeBlockInsideList()
{
var input = @"1. In the :
```
Id DisplayName Description
-- ----------- -----------
62375ab9-6b52-47ed-826b-58e47e0e304b Group.Unified ...
```";
TestParser.TestSpec(input, @"<ol>
<li><p>In the :</p>
<pre><code>Id DisplayName Description
-- ----------- -----------
62375ab9-6b52-47ed-826b-58e47e0e304b Group.Unified ...
</code></pre></li>
</ol>");
}
[Test]
public void VisualizeMathExpressions()
{
string math = @"Math expressions
$\frac{n!}{k!(n-k)!} = \binom{n}{k}$
$$\frac{n!}{k!(n-k)!} = \binom{n}{k}$$
$$
\frac{n!}{k!(n-k)!} = \binom{n}{k}
$$
<div class=""math"">
\begin{align}
\sqrt{37} & = \sqrt{\frac{73^2-1}{12^2}} \\
& = \sqrt{\frac{73^2}{12^2}\cdot\frac{73^2-1}{73^2}} \\
& = \sqrt{\frac{73^2}{12^2}}\sqrt{\frac{73^2-1}{73^2}} \\
& = \frac{73}{12}\sqrt{1 - \frac{1}{73^2}} \\
& \approx \frac{73}{12}\left(1 - \frac{1}{2\cdot73^2}\right)
\end{align}
</div>
";
//Console.WriteLine("Math Expressions:\n");
var pl = new MarkdownPipelineBuilder().UseMathematics().Build(); // UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build()
var html = Markdown.ToHtml(math, pl);
//Console.WriteLine(html);
}
[Test]
public void InlineMathExpression()
{
string math = @"Math expressions
$\frac{n!}{k!(n-k)!} = \binom{n}{k}$
";
var pl = new MarkdownPipelineBuilder().UseMathematics().Build(); // UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build()
var html = Markdown.ToHtml(math, pl);
var test1 = html.Contains("<p><span class=\"math\">\\(");
var test2 = html.Contains("\\)</span></p>");
if (!test1 || !test2)
{
Console.WriteLine(html);
}
Assert.IsTrue(test1, "Leading bracket missing");
Assert.IsTrue(test2, "Trailing bracket missing");
}
[Test]
public void BlockMathExpression()
{
string math = @"Math expressions
$$
\frac{n!}{k!(n-k)!} = \binom{n}{k}
$$
";
var pl = new MarkdownPipelineBuilder().UseMathematics().Build(); // UseEmphasisExtras(EmphasisExtraOptions.Subscript).Build()
var html = Markdown.ToHtml(math, pl);
var test1 = html.Contains("<div class=\"math\">\n\\[");
var test2 = html.Contains("\\]</div>");
if (!test1 || !test2)
{
Console.WriteLine(html);
}
Assert.IsTrue(test1, "Leading bracket missing");
Assert.IsTrue(test2, "Trailing bracket missing");
}
[Test]
public void CanDisableParsingHeadings()
{
var noHeadingsPipeline = new MarkdownPipelineBuilder().DisableHeadings().Build();
TestParser.TestSpec("Foo\n===", "<h1>Foo</h1>");
TestParser.TestSpec("Foo\n===", "<p>Foo\n===</p>", noHeadingsPipeline);
TestParser.TestSpec("# Heading 1", "<h1>Heading 1</h1>");
TestParser.TestSpec("# Heading 1", "<p># Heading 1</p>", noHeadingsPipeline);
// Does not also disable link reference definitions
TestParser.TestSpec("[Foo]\n\n[Foo]: bar", "<p><a href=\"bar\">Foo</a></p>");
TestParser.TestSpec("[Foo]\n\n[Foo]: bar", "<p><a href=\"bar\">Foo</a></p>", noHeadingsPipeline);
}
[Test]
public void CanOpenAutoLinksInNewWindow()
{
var pipeline = new MarkdownPipelineBuilder().UseAutoLinks().Build();
var newWindowPipeline = new MarkdownPipelineBuilder().UseAutoLinks(new AutoLinkOptions() { OpenInNewWindow = true }).Build();
TestParser.TestSpec("www.foo.bar", "<p><a href=\"http://www.foo.bar\">www.foo.bar</a></p>", pipeline);
TestParser.TestSpec("www.foo.bar", "<p><a href=\"http://www.foo.bar\" target=\"_blank\">www.foo.bar</a></p>", newWindowPipeline);
}
[Test]
public void CanUseHttpsPrefixForWWWAutoLinks()
{
var pipeline = new MarkdownPipelineBuilder().UseAutoLinks().Build();
var httpsPipeline = new MarkdownPipelineBuilder().UseAutoLinks(new AutoLinkOptions() { UseHttpsForWWWLinks = true }).Build();
TestParser.TestSpec("www.foo.bar", "<p><a href=\"http://www.foo.bar\">www.foo.bar</a></p>", pipeline);
TestParser.TestSpec("www.foo.bar", "<p><a href=\"https://www.foo.bar\">www.foo.bar</a></p>", httpsPipeline);
}
[Test]
public void RootInlineHasCorrectSourceSpan()
{
var pipeline = new MarkdownPipelineBuilder().UsePreciseSourceLocation().Build();
pipeline.TrackTrivia = true;
var document = Markdown.Parse("0123456789\n", pipeline);
var expectedSourceSpan = new SourceSpan(0, 10);
Assert.That(((LeafBlock)document.LastChild).Inline.Span == expectedSourceSpan);
}
[Test]
public void RootInlineInTableCellHasCorrectSourceSpan()
{
var pipeline = new MarkdownPipelineBuilder().UsePreciseSourceLocation().UseAdvancedExtensions().Build();
pipeline.TrackTrivia = true;
var document = Markdown.Parse("| a | b |\n| --- | --- |\n| <span id=\"dest\"></span><span id=\"DEST\"></span>*dest*<br/> | \\[in\\] The address of the result of the operation.<br/> |", pipeline);
var paragraph = (ParagraphBlock)((TableCell)((TableRow)((Table)document.LastChild).LastChild).First()).LastChild;
Assert.That(paragraph.Inline.Span.Start == paragraph.Inline.FirstChild.Span.Start);
Assert.That(paragraph.Inline.Span.End == paragraph.Inline.LastChild.Span.End);
}
[Test]
public void TestGridTableShortLine()
{
var input = @"
+--+
| |
+-";
var expected = @"<table>
<col style=""width:100%"" />
<tbody>
<tr>
<td></td>
</tr>
</tbody>
</table>
";
TestParser.TestSpec(input, expected, new MarkdownPipelineBuilder().UseGridTables().Build());
}
[Test]
public void TestDefinitionListInListItemWithBlankLine()
{
var input = @"
-
term
: definition
";
var expected = @"<ul>
<li>
<dl>
<dt>term</dt>
<dd>definition</dd>
</dl>
</li>
</ul>
";
TestParser.TestSpec(input, expected, new MarkdownPipelineBuilder().UseDefinitionLists().Build());
}
[Test]
public void TestAlertWithinAlertOrNestedBlock()
{
var input = @"
>[!NOTE]
[!NOTE]
The second one is not a note.
>>[!NOTE]
Also not a note.
";
var expected = @"<div class=""markdown-alert markdown-alert-note"">
<p class=""markdown-alert-title""><svg viewBox=""0 0 16 16"" version=""1.1"" width=""16"" height=""16"" aria-hidden=""true""><path d=""M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z""></path></svg>Note</p>
<p>[!NOTE]
The second one is not a note.</p>
</div>
<blockquote>
<blockquote>
<p>[!NOTE]
Also not a note.</p>
</blockquote>
</blockquote>
";
TestParser.TestSpec(input, expected, new MarkdownPipelineBuilder().UseAlertBlocks().Build());
}
[Test]
public void TestNestedAlertInsideBlockquote()
{
// >>[!NOTE] should become a blockquote wrapping an alert when AllowNestedAlerts is enabled
var input = @">>[!NOTE]
Also a note.
";
var expected = @"<blockquote>
<div class=""markdown-alert markdown-alert-note"">
<p class=""markdown-alert-title""><svg viewBox=""0 0 16 16"" version=""1.1"" width=""16"" height=""16"" aria-hidden=""true""><path d=""M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z""></path></svg>Note</p>
<p>Also a note.</p>
</div>
</blockquote>
";
TestParser.TestSpec(input, expected, new MarkdownPipelineBuilder().UseAlertBlocks(allowNestedAlerts: true).Build());
}
[Test]
public void TestNestedAlertInsideAlert()
{
// An alert inside another alert is never recognized, even with AllowNestedAlerts
var input = @">[!NOTE]
> >[!TIP]
> > A tip inside a note
";
var expected = @"<div class=""markdown-alert markdown-alert-note"">
<p class=""markdown-alert-title""><svg viewBox=""0 0 16 16"" version=""1.1"" width=""16"" height=""16"" aria-hidden=""true""><path d=""M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z""></path></svg>Note</p>
<p></p>
<blockquote>
<p>[!TIP]
A tip inside a note</p>
</blockquote>
</div>
";
TestParser.TestSpec(input, expected, new MarkdownPipelineBuilder().UseAlertBlocks(allowNestedAlerts: true).Build());
}
[Test]
public void TestAlertInsideListItem()
{
// Alerts inside list items require AllowNestedAlerts
var input = @"- > [!NOTE]
> A note inside a list item
";
var expected = @"<ul>
<li>
<div class=""markdown-alert markdown-alert-note"">
<p class=""markdown-alert-title""><svg viewBox=""0 0 16 16"" version=""1.1"" width=""16"" height=""16"" aria-hidden=""true""><path d=""M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z""></path></svg>Note</p>
<p>A note inside a list item</p>
</div>
</li>
</ul>
";
TestParser.TestSpec(input, expected, new MarkdownPipelineBuilder().UseAlertBlocks(allowNestedAlerts: true).Build());
}
[Test]
public void TestAlertInsideNestedListItem()
{
// Alert inside a nested list item (list item indented under another list item) requires AllowNestedAlerts
var input = @"- list item 1
- list item 2
- > [!NOTE]
> A note inside a nested list item
";
var expected = @"<ul>
<li>list item 1</li>
<li>list item 2
<ul>
<li>
<div class=""markdown-alert markdown-alert-note"">
<p class=""markdown-alert-title""><svg viewBox=""0 0 16 16"" version=""1.1"" width=""16"" height=""16"" aria-hidden=""true""><path d=""M0 8a8 8 0 1 1 16 0A8 8 0 0 1 0 8Zm8-6.5a6.5 6.5 0 1 0 0 13 6.5 6.5 0 0 0 0-13ZM6.5 7.75A.75.75 0 0 1 7.25 7h1a.75.75 0 0 1 .75.75v2.75h.25a.75.75 0 0 1 0 1.5h-2a.75.75 0 0 1 0-1.5h.25v-2h-.25a.75.75 0 0 1-.75-.75ZM8 6a1 1 0 1 1 0-2 1 1 0 0 1 0 2Z""></path></svg>Note</p>
<p>A note inside a nested list item</p>
</div>
</li>
</ul>
</li>
</ul>
";
TestParser.TestSpec(input, expected, new MarkdownPipelineBuilder().UseAlertBlocks(allowNestedAlerts: true).Build());
}
[Test]
public void TestIssue887ListAfterNestedBlockQuote()
{
var input = @"> >* _Unordered 1_ QL2 level 1 no space sep
> > Continued 1
> > * Unordered 2 level 1
> > 1. **Ordered 1** QL2 level 1
> > Continued 1
> > > Not continued QL3
> > 2. Ordered 2 QL2 level 1
> > Continued 2a
> >
> > Continued 2b
> >
> > Continued 2c
> >
> > 3. Ordered 3 QL2 level 2
> > Continued 3a
> >
> > Continued 3b
";
var expected = @"<blockquote>
<blockquote>
<ul>
<li><em>Unordered 1</em> QL2 level 1 no space sep
Continued 1</li>
<li>Unordered 2 level 1</li>
</ul>
<ol>
<li><strong>Ordered 1</strong> QL2 level 1
Continued 1</li>
</ol>
<blockquote>
<p>Not continued QL3</p>
</blockquote>
<ol start=""2"">
<li><p>Ordered 2 QL2 level 1
Continued 2a</p>
<p>Continued 2b</p>
<p>Continued 2c</p>
<ol start=""3"">
<li><p>Ordered 3 QL2 level 2
Continued 3a</p>
<p>Continued 3b</p>
</li>
</ol>
</li>
</ol>
</blockquote>
</blockquote>";
TestParser.TestSpec(input, expected);
}
[Test]
public void TestIssue845ListItemBlankLine()
{
TestParser.TestSpec("-\n\n foo",@"
<ul>
<li></li>
</ul>
<p>foo</p>");
TestParser.TestSpec("-\n-\n\n foo",@"
<ul>
<li></li>
<li></li>
</ul>
<p>foo</p>");
TestParser.TestSpec("-\n\n-\n\n foo",@"
<ul>
<li></li>
<li></li>
</ul>
<p>foo</p>");
}
}