parameterset: refactor marking empty parametersets

_pytest/mark.py

@@ -73,7 +73,7 @@ class ParameterSet(namedtuple('ParameterSet', 'values, marks, id')):
         return cls(argval, marks=newmarks, id=None)
 
     @classmethod
-    def _for_parameterize(cls, argnames, argvalues, function):
+    def _for_parameterize(cls, argnames, argvalues, function, config):
         if not isinstance(argnames, (tuple, list)):
             argnames = [x.strip() for x in argnames.split(",") if x.strip()]
             force_tuple = len(argnames) == 1
@@ -85,10 +85,7 @@ class ParameterSet(namedtuple('ParameterSet', 'values, marks, id')):
         del argvalues
 
         if not parameters:
-            fs, lineno = getfslineno(function)
-            reason = "got empty parameter set %r, function %s at %s:%d" % (
-                argnames, function.__name__, fs, lineno)
-            mark = MARK_GEN.skip(reason=reason)
+            mark = get_empty_parameterset_mark(config, argnames, function)
             parameters.append(ParameterSet(
                 values=(NOTSET,) * len(argnames),
                 marks=[mark],
@@ -97,6 +94,14 @@ class ParameterSet(namedtuple('ParameterSet', 'values, marks, id')):
         return argnames, parameters
 
 
+def get_empty_parameterset_mark(config, argnames, function):
+
+    fs, lineno = getfslineno(function)
+    reason = "got empty parameter set %r, function %s at %s:%d" % (
+        argnames, function.__name__, fs, lineno)
+    return MARK_GEN.skip(reason=reason)
+
+
 class MarkerError(Exception):
 
     """Error in use of a pytest marker/attribute."""

_pytest/python.py

@@ -786,7 +786,7 @@ class Metafunc(fixtures.FuncargnamesCompatAttr):
         from _pytest.mark import ParameterSet
         from py.io import saferepr
         argnames, parameters = ParameterSet._for_parameterize(
-            argnames, argvalues, self.function)
+            argnames, argvalues, self.function, self.config)
         del argvalues
 
         if scope is None: