test: add unit tests

uv.lock

@@ -138,6 +138,11 @@ dev = [
     { name = "ruff" },
 ]
 
+[package.dev-dependencies]
+dev = [
+    { name = "pytest" },
+]
+
 [package.metadata]
 requires-dist = [
     { name = "docker", specifier = ">=7.0.0" },
@@ -150,6 +155,9 @@ requires-dist = [
     { name = "typer", specifier = ">=0.9.0" },
 ]
 
+[package.metadata.requires-dev]
+dev = [{ name = "pytest", specifier = ">=8.3.5" }]
+
 [[package]]
 name = "mdurl"
 version = "0.1.2"