Don't stop at the first package when looking up package-scoped fixtures.

Example:
package1.subpackage1
package1.subpackage2

package1's setup/teardown were executed again when exiting subpackage1 and entering subpackage2.

_pytest/fixtures.py

@@ -2,6 +2,7 @@ from __future__ import absolute_import, division, print_function
 
 import functools
 import inspect
+import os
 import sys
 import warnings
 from collections import OrderedDict, deque, defaultdict
@@ -70,6 +71,17 @@ def scopeproperty(name=None, doc=None):
     return decoratescope
 
 
+def get_scope_package(node, fixturedef):
+    cls = node.Package
+    current = node
+    fixture_package_name = os.path.join(fixturedef.baseid, '__init__.py')
+    while current and type(current) is not cls or \
+            fixture_package_name != current.nodeid:
+        current = current.parent
+    assert current
+    return current
+
+
 def get_scope_node(node, scope):
     cls = scopename2class.get(scope)
     if cls is None:
@@ -558,7 +570,10 @@ class FixtureRequest(FuncargnamesCompatAttr):
         if scope == "function":
             # this might also be a non-function Item despite its attribute name
             return self._pyfuncitem
-        node = get_scope_node(self._pyfuncitem, scope)
+        if scope == 'package':
+            node = get_scope_package(self._pyfuncitem, self._fixturedef)
+        else:
+            node = get_scope_node(self._pyfuncitem, scope)
         if node is None and scope == "class":
             # fallback to function item itself
             node = self._pyfuncitem

_pytest/nodes.py

@@ -116,6 +116,7 @@ class Node(object):
     Function = _CompatProperty("Function")
     File = _CompatProperty("File")
     Item = _CompatProperty("Item")
+    Package = _CompatProperty("Package")
 
     def _getcustomclass(self, name):
         maybe_compatprop = getattr(type(self), name)

_pytest/python.py

@@ -13,11 +13,11 @@ from itertools import count
 
 import py
 import six
+from _pytest.main import FSHookProxy
 from _pytest.mark import MarkerError
 from _pytest.config import hookimpl
 
 import _pytest
-from _pytest.main import Session
 import pluggy
 from _pytest import fixtures
 from _pytest import nodes
@@ -490,7 +490,7 @@ class Module(nodes.File, PyCollector):
             self.addfinalizer(teardown_module)
 
 
-class Package(Session, Module):
+class Package(Module):
 
     def __init__(self, fspath, parent=None, config=None, session=None, nodeid=None):
         session = parent.session
@@ -503,7 +503,38 @@ class Package(Session, Module):
         for path in list(session.config.pluginmanager._duplicatepaths):
             if path.dirname == fspath.dirname and path != fspath:
                 session.config.pluginmanager._duplicatepaths.remove(path)
-        pass
+
+    def _recurse(self, path):
+        ihook = self.gethookproxy(path.dirpath())
+        if ihook.pytest_ignore_collect(path=path, config=self.config):
+            return
+        for pat in self._norecursepatterns:
+            if path.check(fnmatch=pat):
+                return False
+        ihook = self.gethookproxy(path)
+        ihook.pytest_collect_directory(path=path, parent=self)
+        return True
+
+    def gethookproxy(self, fspath):
+        # check if we have the common case of running
+        # hooks with all conftest.py filesall conftest.py
+        pm = self.config.pluginmanager
+        my_conftestmodules = pm._getconftestmodules(fspath)
+        remove_mods = pm._conftest_plugins.difference(my_conftestmodules)
+        if remove_mods:
+            # one or more conftests are not in use at this fspath
+            proxy = FSHookProxy(fspath, pm, remove_mods)
+        else:
+            # all plugis are active for this fspath
+            proxy = self.config.hook
+        return proxy
+
+    def _collectfile(self, path):
+        ihook = self.gethookproxy(path)
+        if not self.isinitpath(path):
+            if ihook.pytest_ignore_collect(path=path, config=self.config):
+                return ()
+        return ihook.pytest_collect_file(path=path, parent=self)
 
     def isinitpath(self, path):
         return path in self.session._initialpaths