added unit test

Author: jayhack

tests/unit/test_imports.py

@@ -0,0 +1,16 @@
+import codegen
+from codegen import Codebase
+
+
+def test_codegen_imports():
+    # Test decorated function
+    @codegen.function(name="sample_codemod")
+    def run(codebase):
+        pass
+
+    # Test class
+    cls = codegen.Function
+    assert cls is not None
+
+    codebase = Codebase("./")
+    assert codebase is not None