diff --git a/src/tests/config.toml b/src/tests/config.toml
new file mode 100644
index 0000000..6cf6a90
--- /dev/null
+++ b/src/tests/config.toml
@@ -0,0 +1,8 @@
+[general]
+lang = "en"
+title = "Blog"
+
+[contact]
+author = "author"
+email = "email@example.com"
+signal = "signal url"
diff --git a/src/tests/image.png b/src/tests/image.png
new file mode 100644
index 0000000..49abd93
Binary files /dev/null and b/src/tests/image.png differ
diff --git a/src/tests/no_metadata_post.md b/src/tests/no_metadata_post.md
new file mode 100644
index 0000000..115a838
--- /dev/null
+++ b/src/tests/no_metadata_post.md
@@ -0,0 +1,2 @@
+# This markdown has no metadata.
+That's bad. Don't do it. It's for tests only.
diff --git a/src/tests/post.md b/src/tests/post.md
new file mode 100644
index 0000000..dfeaa5f
--- /dev/null
+++ b/src/tests/post.md
@@ -0,0 +1,41 @@
+---
+author: "joseph"
+date: "2026-01-01"
+title: "Example of a blog post"
+tags: ["blog", "test", "lalilulelo"]
+---
+# This is an example post
+
+In this example we will do a couple of cool markdown things.
+
+## This is a h2 header
+*This text is written in italic!*
+### Look at this!
+**This text is BOLD!**
+
+## Hello world!
+```cpp
+#include <iostream>
+
+int main() {
+    std::cout << "Hello world!" << std::endl;
+}
+```
+This is super cool!
+
+## Time to link some random website!
+This [should be clickable](https://example.com)
+
+## Image test
+![this should show an image](./image.png)
+
+## This is an ordered list
+1. one
+2. six
+3. seven
+
+## This is an unordered one
+- six
+- nine
+- six
+- nine
diff --git a/src/tests/tests.cpp b/src/tests/tests.cpp
new file mode 100644
index 0000000..214e5d8
--- /dev/null
+++ b/src/tests/tests.cpp
@@ -0,0 +1,87 @@
+#include "../config.hpp"
+#include "../markdown.hpp"
+#include "../utils.hpp"
+#include <catch2/catch_all.hpp>
+#include <catch2/catch_test_macros.hpp>
+#include <optional>
+#include <string>
+
+TEST_CASE("Checking config file read", "[config]") {
+  const std::string FILE_NAME = "tests/config.toml";
+
+  Config config = get_config(FILE_NAME);
+
+  REQUIRE(config.contact.author == "author");
+  REQUIRE(config.contact.email == "email@example.com");
+  REQUIRE(config.contact.signal == "signal url");
+  REQUIRE(config.general.lang == "en");
+  REQUIRE(config.general.title == "Blog");
+}
+
+TEST_CASE("convert_string_to_set parses inline YAML string list") {
+  const std::string input = "[\"haha\", \"dupa\", \"xdd\"]";
+  const std::set<std::string> output = {"haha", "dupa", "xdd"};
+  REQUIRE(convert_string_to_set(input) == output);
+}
+
+TEST_CASE("get_metadata function data correctness test") {
+  const std::string FILE_NAME = "./tests//post.md";
+  Metadata result = get_metadata(FILE_NAME).value();
+
+  std::string expected_author = "joseph";
+  std::string expected_date = "2026-01-01";
+  std::string expected_title = "Example of a blog post";
+  std::set<std::string> expected_tags = {"blog", "test", "lalilulelo"};
+
+  REQUIRE(result.author == expected_author);
+  REQUIRE(result.date == expected_date);
+  REQUIRE(result.title == expected_title);
+
+  for (const auto &tag : expected_tags) {
+    REQUIRE(result.tags.count(tag));
+  }
+}
+
+TEST_CASE("get_metadata function test with a file that doesn't have metadata") {
+  const std::string FILE_NAME = ".tests/no_metadata_post.md";
+  std::optional<Metadata> result = get_metadata(FILE_NAME);
+  REQUIRE(result == std::nullopt);
+}
+
+TEST_CASE("get_html function parsing test") {
+  const std::string INPUT = "./tests/post.md";
+  const std::string EXPECTED_OUTPUT = R"HTML(<h1>This is an example post</h1>
+<p>In this example we will do a couple of cool markdown things.</p>
+<h2>This is a h2 header</h2>
+<p><em>This text is written in italic!</em></p>
+<h3>Look at this!</h3>
+<p><strong>This text is BOLD!</strong></p>
+<h2>Hello world!</h2>
+<pre><code class="language-cpp">#include &lt;iostream&gt;
+
+int main() {
+    std::cout &lt;&lt; &quot;Hello world!&quot; &lt;&lt; std::endl;
+}
+</code></pre>
+<p>This is super cool!</p>
+<h2>Time to link some random website!</h2>
+<p>This <a href="https://example.com">should be clickable</a></p>
+<h2>Image test</h2>
+<p><img src="./image.png" alt="this should show an image"></p>
+<h2>This is an ordered list</h2>
+<ol>
+<li>one</li>
+<li>six</li>
+<li>seven</li>
+</ol>
+<h2>This is an unordered one</h2>
+<ul>
+<li>six</li>
+<li>nine</li>
+<li>six</li>
+<li>nine</li>
+</ul>
+)HTML";
+
+  REQUIRE(get_html(INPUT) == EXPECTED_OUTPUT);
+}