allow unregistration by name

pytest/__init__.py

@@ -5,7 +5,7 @@ see http://pytest.org for documentation and details
 
 (c) Holger Krekel and others, 2004-2010
 """
-__version__ = '2.0.0.dev16'
+__version__ = '2.0.0.dev17'
 
 __all__ = ['config', 'cmdline']
 

pytest/_core.py

@@ -47,9 +47,11 @@ class PluginManager(object):
             self._plugins.insert(0, plugin)
         return True
 
-    def unregister(self, plugin):
-        self.hook.pytest_plugin_unregistered(plugin=plugin)
+    def unregister(self, plugin=None, name=None):
+        if plugin is None:
+            plugin = self.getplugin(name=name)
         self._plugins.remove(plugin)
+        self.hook.pytest_plugin_unregistered(plugin=plugin)
         for name, value in list(self._name2plugin.items()):
             if value == plugin:
                 del self._name2plugin[name]

setup.py

@@ -22,7 +22,7 @@ def main():
         name='pytest',
         description='py.test: simple powerful testing with Python',
         long_description = long_description,
-        version='2.0.0.dev16',
+        version='2.0.0.dev17',
         url='http://pytest.org',
         license='MIT license',
         platforms=['unix', 'linux', 'osx', 'cygwin', 'win32'],

testing/test_pluginmanager.py

@@ -164,7 +164,7 @@ class TestBootstrapping:
         assert pp.getplugin('hello') == a2
         pp.unregister(a1)
         assert not pp.isregistered(a1)
-        pp.unregister(a2)
+        pp.unregister(name="hello")
         assert not pp.isregistered(a2)
 
     def test_pm_ordering(self):