Rewrite tests

src/ergogen_footprint_converter/main.py

@@ -5,11 +5,19 @@ from pathlib import Path
 
 
 def main (args):
+    print(args)
+    in_file: Path = args["in_file"]
+    out_dir: Path = args["out"]
+    if not in_file.exists():
+        raise FileNotFoundError("Input file not found!")
+    
+    out_dir.mkdir(exist_ok=True)
+
     None
 
 def parse_args():
     parser = ArgumentParser()
-    parser.add_argument("in", type=Path)
+    parser.add_argument("in_file", type=Path)
     parser.add_argument("--out", type=Path, required=False, default=Path('.'))
 
     return parser.parse_args()