Add test for empty shell text for IMPLEMENTS

1 files changed, 8 insertions, 0 deletions

diff --git a/yarnlib/block_parser_tests.py b/yarnlib/block_parser_tests.py
index 7051e17..975444f 100644
--- a/yarnlib/block_parser_tests.py
+++ b/yarnlib/block_parser_tests.py
@@ -92,6 +92,14 @@ class BlockParserTests(unittest.TestCase):
         self.assertEqual(impls[0].regexp, 'foo')
         self.assertEqual(impls[0].shell, 'true')
 
+    def test_parses_implements_with_empty_shell_text(self):
+        self.parser.parse_blocks(['IMPLEMENTS GIVEN foo'])
+        impls = self.parser.implementations
+        self.assertEqual(len(impls), 1)
+        self.assertEqual(impls[0].what, 'GIVEN')
+        self.assertEqual(impls[0].regexp, 'foo')
+        self.assertEqual(impls[0].shell, '')
+
     def test_parses_two_implements_in_a_code_block(self):
         self.parser.parse_blocks(
             ['IMPLEMENTS GIVEN foo\ntrue\nIMPLEMENTS WHEN bar\ncat /dev/null'])