Fixes #201 and pytest compatibility. (#232)

* Fixes #201 and pytest compatibility.

* Review comments

Author: olegpidsadnyi

CHANGES.rst

@@ -1,6 +1,15 @@
 Changelog
 =========
 
+
+2.20.0
+------
+
+- Added support for But steps (olegpidsadnyi)
+- Fixed compatibility with pytest 3.3.2 (olegpidsadnyi)
+- MInimal required version of pytest is now 2.8.1 since it doesn't support earlier versions (olegpidsadnyi)
+
+
 2.19.0
 ------
 

README.rst

@@ -35,6 +35,9 @@ Install pytest-bdd
     pip install pytest-bdd
 
 
+The minimal required version of pytest is 2.8.1.
+
+
 Example
 -------
 

pytest_bdd/__init__.py

@@ -3,6 +3,6 @@
 from pytest_bdd.steps import given, when, then
 from pytest_bdd.scenario import scenario, scenarios
 
-__version__ = '2.19.0'
+__version__ = '2.20.0'
 
 __all__ = [given.__name__, when.__name__, then.__name__, scenario.__name__, scenarios.__name__]

pytest_bdd/feature.py

@@ -52,7 +52,9 @@
     ("When ", types.WHEN),
     ("Then ", types.THEN),
     ("@", types.TAG),
-    ("And ", None),  # Unknown step type,
+    # Continuation of the previously mentioned step type
+    ("And ", None),
+    ("But ", None),
 ]
 
 STEP_PARAM_RE = re.compile("\<(.+?)\>")
@@ -297,7 +299,7 @@ def __init__(self, basedir, filename, encoding="utf-8", strict_gherkin=True):
                 if not strict_gherkin:
                     allowed_prev_mode += (types.WHEN, )
 
-                if not scenario and prev_mode not in allowed_prev_mode  and mode in types.STEP_TYPES:
+                if not scenario and prev_mode not in allowed_prev_mode and mode in types.STEP_TYPES:
                     raise exceptions.FeatureError(
                         "Step definition outside of a Scenario or a Background", line_number, clean_line, filename)
 

pytest_bdd/steps.py

@@ -304,16 +304,19 @@ def inject_fixture(request, arg, value):
     fd.cached_result = (value, 0, None)
 
     old_fd = get_request_fixture_defs(request).get(arg)
-    old_value = get_fixture_value_raw(request, arg)
     add_fixturename = arg not in request.fixturenames
 
+    old_value = get_fixture_value_raw(request, arg)  # Compatibility with pytest < 3.3.2
+
     def fin():
         request._fixturemanager._arg2fixturedefs[arg].remove(fd)
         get_request_fixture_defs(request)[arg] = old_fd
-        set_fixture_value(request, arg, old_value)
+
         if add_fixturename:
             get_request_fixture_names(request).remove(arg)
 
+        set_fixture_value(request, arg, old_value)  # Compatibility with pytest < 3.3.2
+
     request.addfinalizer(fin)
 
     # inject fixture definition

pytest_bdd/utils.py

@@ -37,19 +37,31 @@ def get_fixture_value(request, name):
 
 
 def get_fixture_value_raw(request, name):
-    """Set the given raw fixture value from the pytest request object."""
+    """Set the given raw fixture value from the pytest request object.
+
+    :note: Compatibility with pytest < 3.3.2
+    """
     try:
         return request._fixture_values.get(name)
     except AttributeError:
-        return request._funcargs.get(name)
+        try:
+            return request._funcargs.get(name)
+        except AttributeError:
+            pass
 
 
 def set_fixture_value(request, name, value):
-    """Set the given fixture value on the pytest request object."""
+    """Set the given fixture value on the pytest request object.
+
+    :note: Compatibility with pytest < 3.3.2
+    """
     try:
         request._fixture_values[name] = value
     except AttributeError:
-        request._funcargs[name] = value
+        try:
+            request._funcargs[name] = value
+        except AttributeError:
+            pass
 
 
 def get_request_fixture_defs(request):

setup.py

@@ -75,7 +75,7 @@ def run_tests(self):
         "Mako",
         "parse",
         "parse_type",
-        "pytest>=2.6.0",
+        "pytest>=2.8.1",
         "six>=1.9.0",
     ],
     # the following makes a plugin available to py.test

tests/feature/steps.feature

@@ -10,7 +10,7 @@ Scenario: Executed step by step
     And I append 2 to the list
     And I append 3 to the list
     Then foo should have value "foo"
-    And the list should be [1, 2, 3]
+    But the list should be [1, 2, 3]
 
 
 Scenario: When step can be the first

tests/feature/test_scenarios.py

@@ -4,6 +4,10 @@
 
 def test_scenarios(testdir):
     """Test scenarios shortcut."""
+    testdir.makeini("""
+            [pytest]
+            console_output_style=classic
+        """)
     testdir.makeconftest("""
         import pytest
         from pytest_bdd import given

tests/feature/test_steps.py

@@ -195,6 +195,11 @@ def test_when_step_validation_error():
 
 def test_step_trace(testdir):
     """Test step trace."""
+    testdir.makeini("""
+        [pytest]
+        console_output_style=classic
+    """)
+
     testdir.makefile('.feature', test="""
     Scenario: When step has failure
         Given I have a bar