allow empty example values

CHANGES.rst

@@ -5,6 +5,7 @@ Changelog
 -----
 
 - Allow more than one parameter per step (bubenkoff)
+- Allow empty example values (bubenkoff)
 
 
 2.0.0

pytest_bdd/feature.py

@@ -79,8 +79,8 @@ def get_step_params(name):
     return tuple(frozenset(STEP_PARAM_RE.findall(name)))
 
 
-def strip(line):
-    """Remove leading and trailing whitespaces and comments.
+def strip_comments(line):
+    """Remove comments.
 
     :param line: Line of the Feature file.
     :return: Stripped line.
@@ -147,7 +147,8 @@ class Feature(object):
         with _open_file(filename, encoding) as f:
             content = force_unicode(f.read(), encoding)
             for line_number, line in enumerate(content.splitlines()):
-                line = strip(line)
+                raw_line = line.strip()
+                line = strip_comments(line)
                 if not line:
                     continue
                 mode = get_step_type(line) or mode
@@ -182,12 +183,12 @@ class Feature(object):
                 elif mode == types.EXAMPLES_VERTICAL:
                     mode = types.EXAMPLE_LINE_VERTICAL
                 elif mode == types.EXAMPLES_HEADERS:
-                    scenario.set_param_names([l.strip() for l in line.split('|') if l.strip()])
+                    scenario.set_param_names([l.strip() for l in line.split('|')[1:-1] if l.strip()])
                     mode = types.EXAMPLE_LINE
                 elif mode == types.EXAMPLE_LINE:
-                    scenario.add_example([l.strip() for l in line.split('|') if l.strip()])
+                    scenario.add_example([l.strip() for l in raw_line.split('|')[1:-1]])
                 elif mode == types.EXAMPLE_LINE_VERTICAL:
-                    line = [l.strip() for l in line.split('|') if l.strip()]
+                    line = [l.strip() for l in raw_line.split('|')[1:-1]]
                     scenario.add_example_row(line[0], line[1:])
                 elif mode and mode != types.FEATURE:
                     scenario.add_step(step_name=line, step_type=mode)

tests/feature/comments.feature

@@ -0,0 +1,3 @@
+Scenario: Comments
+    # Comment
+    Given I have a bar

tests/feature/outline.feature

@@ -39,3 +39,24 @@ Scenario Outline: Outlined with vertical example table
     | start | 12 | 2 |
     | eat   | 5  | 1 |
     | left  | 7  | 1 |
+
+
+Scenario Outline: Outlined with empty example values vertical
+    Given there are <start> cucumbers
+    When I eat <eat> cucumbers
+    Then I should have <left> cucumbers
+
+    Examples: Vertical
+    | start | # |
+    | eat   |   |
+    | left  |   |
+
+
+Scenario Outline: Outlined with empty example values
+    Given there are <start> cucumbers
+    When I eat <eat> cucumbers
+    Then I should have <left> cucumbers
+
+    Examples:
+    | start | eat | left |
+    | #     |     |      |

tests/feature/test_outline.py

@@ -79,3 +79,27 @@ def test_vertical_example():
     """Test outlined scenario with vertical examples table."""
     assert test_vertical_example.parametrize.args == (
         [u'start', u'eat', u'left'], [[12, 5.0, '7'], [2, 1.0, '1']])
+
+
+def test_empty_example_values():
+    """Test outlined scenario with empty example values."""
+
+    @scenario(
+        'outline.feature',
+        'Outlined with empty example values',
+    )
+    def test_scenario():
+        pass
+
+    assert test_scenario.parametrize.args == (
+        [u'start', u'eat', u'left'], [['#', '', '']])
+
+    @scenario(
+        'outline.feature',
+        'Outlined with empty example values vertical',
+    )
+    def test_scenario():
+        pass
+
+    assert test_scenario.parametrize.args == (
+        [u'start', u'eat', u'left'], [['#', '', '']])

tests/feature/test_scenario.py

@@ -13,3 +13,16 @@ def test_scenario_not_found(request):
             'not_found.feature',
             'NOT FOUND'
         )
+
+
+def test_scenario_comments(request):
+    """Test comments inside scenario."""
+
+    @scenario(
+        'comments.feature',
+        'Comments'
+    )
+    def test():
+        pass
+
+    test(request)