diff --git a/t/00-load.t b/t/00-load.t
new file mode 100755
index 0000000..6aa8d60
--- /dev/null
+++ b/t/00-load.t
@@ -0,0 +1,9 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 1;
+use MarkdownParser;
+
+ok( 1, 'Module loaded successfully' );
+
diff --git a/t/01-headers.t b/t/01-headers.t
new file mode 100755
index 0000000..76e2110
--- /dev/null
+++ b/t/01-headers.t
@@ -0,0 +1,16 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 6;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+is( $parser->parse("# Header 1"),      "<h1>Header 1</h1>\n", "H1 header" );
+is( $parser->parse("## Header 2"),     "<h2>Header 2</h2>\n", "H2 header" );
+is( $parser->parse("### Header 3"),    "<h3>Header 3</h3>\n", "H3 header" );
+is( $parser->parse("#### Header 4"),   "<h4>Header 4</h4>\n", "H4 header" );
+is( $parser->parse("##### Header 5"),  "<h5>Header 5</h5>\n", "H5 header" );
+is( $parser->parse("###### Header 6"), "<h6>Header 6</h6>\n", "H6 header" );
+
diff --git a/t/02-paragraphs.t b/t/02-paragraphs.t
new file mode 100755
index 0000000..cb5240a
--- /dev/null
+++ b/t/02-paragraphs.t
@@ -0,0 +1,25 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 3;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+is(
+    $parser->parse("Simple paragraph"),
+    "<p>Simple paragraph</p>\n",
+    "Single paragraph"
+);
+is(
+    $parser->parse("First paragraph\n\nSecond paragraph"),
+    "<p>First paragraph</p>\n<p>Second paragraph</p>\n",
+    "Multiple paragraphs"
+);
+is(
+    $parser->parse("Paragraph with\nmultiple lines"),
+    "<p>Paragraph with multiple lines</p>\n",
+    "Multi-line paragraph"
+);
+
diff --git a/t/03-formatting.t b/t/03-formatting.t
new file mode 100755
index 0000000..f17edcc
--- /dev/null
+++ b/t/03-formatting.t
@@ -0,0 +1,65 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 11;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+is(
+    $parser->parse("**bold text**"),
+    "<p><strong>bold text</strong></p>\n",
+    "Bold with **"
+);
+is(
+    $parser->parse("__bold text__"),
+    "<p><strong>bold text</strong></p>\n",
+    "Bold with __"
+);
+is(
+    $parser->parse("*italic text*"),
+    "<p><em>italic text</em></p>\n",
+    "Italic with *"
+);
+is(
+    $parser->parse("_italic text_"),
+    "<p><em>italic text</em></p>\n",
+    "Italic with _"
+);
+is(
+    $parser->parse("**bold** and *italic*"),
+    "<p><strong>bold</strong> and <em>italic</em></p>\n",
+    "Bold and italic together"
+);
+is(
+    $parser->parse("Text with **bold** in middle"),
+    "<p>Text with <strong>bold</strong> in middle</p>\n",
+    "Bold in middle of text"
+);
+is(
+    $parser->parse("Text with *italic* in middle"),
+    "<p>Text with <em>italic</em> in middle</p>\n",
+    "Italic in middle of text"
+);
+is(
+    $parser->parse("**bold** *italic* **bold again**"),
+"<p><strong>bold</strong> <em>italic</em> <strong>bold again</strong></p>\n",
+    "Multiple formatting"
+);
+is(
+    $parser->parse("***bold text***"),
+    "<p><strong>bold text</strong></p>\n",
+    "Bold with ***"
+);
+is(
+    $parser->parse("**bold *italic* bold**"),
+    "<p><strong>bold <em>italic</em> bold</strong></p>\n",
+    "Nested formatting"
+);
+is(
+    $parser->parse("___bold text___"),
+    "<p><strong>bold text</strong></p>\n",
+    "Bold with ___"
+);
+
diff --git a/t/04-links-images.t b/t/04-links-images.t
new file mode 100755
index 0000000..60b9949
--- /dev/null
+++ b/t/04-links-images.t
@@ -0,0 +1,44 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 8;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+is(
+    $parser->parse("[link text](http://example.com)"),
+    "<p><a href=\"http://example.com\">link text</a></p>\n",
+    "Simple link"
+);
+is(
+    $parser->parse("[link with spaces](https://example.com/path)"),
+    "<p><a href=\"https://example.com/path\">link with spaces</a></p>\n",
+    "Link with path"
+);
+is(
+    $parser->parse("![alt text](image.png)"),
+    "<p><img src=\"image.png\" alt=\"alt text\"></p>\n",
+    "Simple image"
+);
+is(
+    $parser->parse("![alt with spaces](http://example.com/image.jpg)"),
+"<p><img src=\"http://example.com/image.jpg\" alt=\"alt with spaces\"></p>\n",
+    "Image with URL"
+);
+is(
+    $parser->parse("[Click me](javascript:alert('XSS'))"),
+    "<p>Click me</p>\n",
+    "JavaScript protocol blocked in links"
+);
+is(
+    $parser->parse("[Click me](data:text/html,<script>alert('XSS')</script>)"),
+    "<p>Click me</p>\n",
+    "Data protocol blocked in links"
+);
+is( $parser->parse("![Image](javascript:alert('XSS'))"),
+    "<p>Image</p>\n", "JavaScript protocol blocked in images" );
+is( $parser->parse("![Image](file:///etc/passwd)"),
+    "<p>Image</p>\n", "File protocol blocked in images" );
+
diff --git a/t/05-lists.t b/t/05-lists.t
new file mode 100755
index 0000000..8d9a77c
--- /dev/null
+++ b/t/05-lists.t
@@ -0,0 +1,40 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 6;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+is(
+    $parser->parse("- Item 1\n- Item 2\n- Item 3"),
+    "<ul>\n<li>Item 1</li>\n<li>Item 2</li>\n<li>Item 3</li>\n</ul>\n",
+    "Unordered list with -"
+);
+is(
+    $parser->parse("* Item 1\n* Item 2"),
+    "<ul>\n<li>Item 1</li>\n<li>Item 2</li>\n</ul>\n",
+    "Unordered list with *"
+);
+is(
+    $parser->parse("+ Item 1\n+ Item 2"),
+    "<ul>\n<li>Item 1</li>\n<li>Item 2</li>\n</ul>\n",
+    "Unordered list with +"
+);
+is(
+    $parser->parse("1. First item\n2. Second item\n3. Third item"),
+"<ol>\n<li>First item</li>\n<li>Second item</li>\n<li>Third item</li>\n</ol>\n",
+    "Ordered list"
+);
+is(
+    $parser->parse("- Item 1\n\n- Item 2"),
+    "<ul>\n<li>Item 1</li>\n</ul>\n<ul>\n<li>Item 2</li>\n</ul>\n",
+    "Multiple list blocks"
+);
+is(
+    $parser->parse("- **Bold item**\n- *Italic item*"),
+"<ul>\n<li><strong>Bold item</strong></li>\n<li><em>Italic item</em></li>\n</ul>\n",
+    "List items with formatting"
+);
+
diff --git a/t/06-code.t b/t/06-code.t
new file mode 100755
index 0000000..f2855a0
--- /dev/null
+++ b/t/06-code.t
@@ -0,0 +1,35 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 5;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+is(
+    $parser->parse("`inline code`"),
+    "<p><code>inline code</code></p>\n",
+    "Inline code"
+);
+is(
+    $parser->parse("Text with `code` in it"),
+    "<p>Text with <code>code</code> in it</p>\n",
+    "Inline code in text"
+);
+is(
+    $parser->parse("```\ncode block\n```"),
+    "<pre><code>\ncode block\n</code></pre>\n",
+    "Code block"
+);
+is(
+    $parser->parse("```\nline 1\nline 2\nline 3\n```"),
+    "<pre><code>\nline 1\nline 2\nline 3\n</code></pre>\n",
+    "Multi-line code block"
+);
+is(
+    $parser->parse("```\n```"),
+    "<pre><code>\n</code></pre>\n",
+    "Empty code block"
+);
+
diff --git a/t/07-blockquotes.t b/t/07-blockquotes.t
new file mode 100755
index 0000000..512986c
--- /dev/null
+++ b/t/07-blockquotes.t
@@ -0,0 +1,25 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 3;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+is(
+    $parser->parse("> Quote text"),
+    "<blockquote>\n<p>Quote text</p>\n</blockquote>\n",
+    "Simple blockquote"
+);
+is(
+    $parser->parse("> First line\n> Second line"),
+    "<blockquote>\n<p>First line</p>\n<p>Second line</p>\n</blockquote>\n",
+    "Multi-line blockquote"
+);
+is(
+    $parser->parse("> Quote with **bold**"),
+    "<blockquote>\n<p>Quote with <strong>bold</strong></p>\n</blockquote>\n",
+    "Blockquote with formatting"
+);
+
diff --git a/t/08-horizontal-rules.t b/t/08-horizontal-rules.t
new file mode 100755
index 0000000..2f09b94
--- /dev/null
+++ b/t/08-horizontal-rules.t
@@ -0,0 +1,13 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 3;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+is( $parser->parse("---"), "<hr>\n", "Horizontal rule with ---" );
+is( $parser->parse("***"), "<hr>\n", "Horizontal rule with ***" );
+is( $parser->parse("___"), "<hr>\n", "Horizontal rule with ___" );
+
diff --git a/t/09-complex.t b/t/09-complex.t
new file mode 100755
index 0000000..e8364de
--- /dev/null
+++ b/t/09-complex.t
@@ -0,0 +1,97 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 4;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+my $input = <<'EOF';
+# Title
+
+This is a paragraph with **bold** and *italic* text.
+
+- List item 1
+- List item 2
+
+[Link](http://example.com)
+EOF
+
+my $expected = <<'EOF';
+<h1>Title</h1>
+<p>This is a paragraph with <strong>bold</strong> and <em>italic</em> text.</p>
+<ul>
+<li>List item 1</li>
+<li>List item 2</li>
+</ul>
+<p><a href="http://example.com">Link</a></p>
+EOF
+
+is( $parser->parse($input), $expected, "Complex document" );
+
+$input = <<'EOF';
+## Section
+
+Paragraph one.
+
+> Blockquote here
+
+Another paragraph.
+EOF
+
+$expected = <<'EOF';
+<h2>Section</h2>
+<p>Paragraph one.</p>
+<blockquote>
+<p>Blockquote here</p>
+</blockquote>
+<p>Another paragraph.</p>
+EOF
+
+is( $parser->parse($input), $expected, "Document with blockquote" );
+
+$input = <<'EOF';
+# Code Example
+
+Here is some `inline code` and a code block:
+
+```
+function test() {
+    return true;
+}
+```
+EOF
+
+$expected = <<'EOF';
+<h1>Code Example</h1>
+<p>Here is some <code>inline code</code> and a code block:</p>
+<pre><code>
+function test() {
+    return true;
+}
+</code></pre>
+EOF
+
+is( $parser->parse($input), $expected, "Document with code" );
+
+$input = <<'EOF';
+# Header
+
+Paragraph with [link](url) and ![image](img.png).
+
+---
+
+## Another Header
+EOF
+
+$expected = <<'EOF';
+<h1>Header</h1>
+<p>Paragraph with <a href="url">link</a> and <img src="img.png" alt="image">.</p>
+<hr>
+<h2>Another Header</h2>
+EOF
+
+is( $parser->parse($input),
+    $expected, "Document with links, images, and horizontal rule" );
+
diff --git a/t/10-html-escape.t b/t/10-html-escape.t
new file mode 100755
index 0000000..909281d
--- /dev/null
+++ b/t/10-html-escape.t
@@ -0,0 +1,30 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 4;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+is(
+    $parser->parse("Text with <tag>"),
+    "<p>Text with &lt;tag&gt;</p>\n",
+    "HTML tags escaped"
+);
+is(
+    $parser->parse("Text with & symbol"),
+    "<p>Text with &amp; symbol</p>\n",
+    "Ampersand escaped"
+);
+is(
+    $parser->parse('Text with "quotes"'),
+    "<p>Text with &quot;quotes&quot;</p>\n",
+    "Quotes escaped"
+);
+is(
+    $parser->parse("Text with 'apostrophe'"),
+    "<p>Text with &#39;apostrophe&#39;</p>\n",
+    "Apostrophe escaped"
+);
+
diff --git a/t/11-tables.t b/t/11-tables.t
new file mode 100644
index 0000000..c0017ab
--- /dev/null
+++ b/t/11-tables.t
@@ -0,0 +1,111 @@
+#!/usr/bin/env perl
+use strict;
+use warnings;
+
+use Test::More tests => 4;
+use MarkdownParser;
+
+my $parser = MarkdownParser->new();
+
+my $input = <<'EOF';
+| Header 1 | Header 2 |
+|----------|----------|
+| Cell 1   | Cell 2   |
+| Cell 3   | Cell 4   |
+EOF
+
+my $expected = <<'EOF';
+<table>
+<tr>
+<th>Header 1</th>
+<th>Header 2</th>
+</tr>
+<tr>
+<td>Cell 1</td>
+<td>Cell 2</td>
+</tr>
+<tr>
+<td>Cell 3</td>
+<td>Cell 4</td>
+</tr>
+</table>
+EOF
+
+is( $parser->parse($input), $expected, "Basic table" );
+
+$input = <<'EOF';
+| Name | Age |
+|------|-----|
+| John | 25  |
+| Jane | 30  |
+EOF
+
+$expected = <<'EOF';
+<table>
+<tr>
+<th>Name</th>
+<th>Age</th>
+</tr>
+<tr>
+<td>John</td>
+<td>25</td>
+</tr>
+<tr>
+<td>Jane</td>
+<td>30</td>
+</tr>
+</table>
+EOF
+
+is( $parser->parse($input), $expected, "Table with different content" );
+
+$input = <<'EOF';
+# Title
+
+| Col1 | Col2 |
+|------|------|
+| Data | Info |
+
+More text.
+EOF
+
+$expected = <<'EOF';
+<h1>Title</h1>
+<table>
+<tr>
+<th>Col1</th>
+<th>Col2</th>
+</tr>
+<tr>
+<td>Data</td>
+<td>Info</td>
+</tr>
+</table>
+<p>More text.</p>
+EOF
+
+is( $parser->parse($input), $expected, "Table with surrounding content" );
+
+$input = <<'EOF';
+| **Bold** | *Italic* | [Link](url) |
+|----------|----------|-------------|
+| Text     | More     | Info        |
+EOF
+
+$expected = <<'EOF';
+<table>
+<tr>
+<th><strong>Bold</strong></th>
+<th><em>Italic</em></th>
+<th><a href="url">Link</a></th>
+</tr>
+<tr>
+<td>Text</td>
+<td>More</td>
+<td>Info</td>
+</tr>
+</table>
+EOF
+
+is( $parser->parse($input), $expected, "Table with inline formatting" );
+