Unit tests for csv feeder + fix some bugs

src/auto_archiver/modules/csv_feeder/csv_feeder.py

@@ -7,16 +7,32 @@ from auto_archiver.utils import url_or_none
 
 class CSVFeeder(Feeder):
 
+    column = None
+
+
     def __iter__(self) -> Metadata:
-        url_column = self.column or 0
         for file in self.files:
             with open(file, "r") as f:
                 reader = csv.reader(f)
                 first_row = next(reader)
-                if not(url_or_none(first_row[url_column])):
-                    # it's a header row, skip it
+                url_column = self.column or 0
+                if isinstance(url_column, str):
+                    try:
+                        url_column = first_row.index(url_column)
+                    except ValueError:
+                        logger.error(f"Column {url_column} not found in header row: {first_row}. Did you set the 'column' config correctly?")
+                        return
+                elif not(url_or_none(first_row[url_column])):
+                    # it's a header row, but we've been given a column number already
                     logger.debug(f"Skipping header row: {first_row}")
+                else:
+                    # first row isn't a header row, rewind the file
+                    f.seek(0)
+
                 for row in reader:
-                    url = row[0]
+                    if not url_or_none(row[url_column]):
+                        logger.warning(f"Not a valid URL in row: {row}, skipping")
+                        continue
+                    url = row[url_column]
                     logger.debug(f"Processing {url}")
                     yield Metadata().set_url(url)