Python: Add type annotations

06_Banner/python/test_banner.py

@@ -0,0 +1,19 @@
+import io
+
+from banner import print_banner
+
+
+def test_print_banner(monkeypatch) -> None:
+    horizontal = "1"
+    vertical = "1"
+    centered = "1"
+    char = "*"
+    statement = "O"  # only capital letters
+    set_page = "2"
+    monkeypatch.setattr(
+        "sys.stdin",
+        io.StringIO(
+            f"{horizontal}\n{vertical}\n{centered}\n{char}\n{statement}\n{set_page}"
+        ),
+    )
+    print_banner()