Add warning when an input file has no scenario code blocks

1 files changed, 3 insertions, 1 deletions

diff --git a/yarn b/yarn
index d9b2b47..fdf81a0 100755
--- a/yarn
+++ b/yarn
@@ -68,7 +68,9 @@ class YarnRunner(cliapp.Application):
     def parse_scenarios(self, filenames):
         mdparser = yarnlib.MarkdownParser()
         for filename in filenames:
-            mdparser.parse_file(filename)
+            blocks = mdparser.parse_file(filename)
+            if not blocks:
+                logging.warning('No scenario code blocks in %s' % filename)
 
         block_parser = yarnlib.BlockParser()
         block_parser.parse_blocks(mdparser.blocks)