Build flashsharp flashcard app

tests/Flashsharp.Tests/MarkdownRendererTests.cs

@@ -0,0 +1,38 @@
+using Flashsharp.Ui;
+
+namespace Flashsharp.Tests;
+
+public sealed class MarkdownRendererTests
+{
+    [Fact]
+    public void Keeps_non_latin_text()
+    {
+        var html = new MarkdownRenderer().ToHtml("سلام دنیا");
+
+        Assert.Contains("سلام دنیا", html);
+    }
+
+    [Fact]
+    public void Removes_javascript_links()
+    {
+        var html = new MarkdownRenderer().ToHtml("[click](javascript:alert(1))");
+
+        Assert.DoesNotContain("javascript:", html, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact]
+    public void Removes_raw_html()
+    {
+        var html = new MarkdownRenderer().ToHtml("<script>alert(1)</script>");
+
+        Assert.DoesNotContain("<script", html, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact]
+    public void Renders_markdown()
+    {
+        var html = new MarkdownRenderer().ToHtml("**bold**");
+
+        Assert.Contains("<strong>bold</strong>", html);
+    }
+}