Fix type errors after adding types to the `py` dependency

src/_pytest/config/argparsing.py

@@ -82,8 +82,8 @@ class Parser:
 
         self.optparser = self._getparser()
         try_argcomplete(self.optparser)
-        args = [str(x) if isinstance(x, py.path.local) else x for x in args]
-        return self.optparser.parse_args(args, namespace=namespace)
+        strargs = [str(x) if isinstance(x, py.path.local) else x for x in args]
+        return self.optparser.parse_args(strargs, namespace=namespace)
 
     def _getparser(self) -> "MyOptionParser":
         from _pytest._argcomplete import filescompleter
@@ -124,8 +124,8 @@ class Parser:
         the remaining arguments unknown at this point.
         """
         optparser = self._getparser()
-        args = [str(x) if isinstance(x, py.path.local) else x for x in args]
-        return optparser.parse_known_args(args, namespace=namespace)
+        strargs = [str(x) if isinstance(x, py.path.local) else x for x in args]
+        return optparser.parse_known_args(strargs, namespace=namespace)
 
     def addini(self, name, help, type=None, default=None):
         """ register an ini-file option.

src/_pytest/config/findpaths.py

@@ -1,6 +1,9 @@
 import os
+from typing import Any
+from typing import Iterable
 from typing import List
 from typing import Optional
+from typing import Tuple
 
 import py
 
@@ -60,7 +63,7 @@ def getcfg(args, config=None):
     return None, None, None
 
 
-def get_common_ancestor(paths):
+def get_common_ancestor(paths: Iterable[py.path.local]) -> py.path.local:
     common_ancestor = None
     for path in paths:
         if not path.exists():
@@ -113,7 +116,7 @@ def determine_setup(
     args: List[str],
     rootdir_cmd_arg: Optional[str] = None,
     config: Optional["Config"] = None,
-):
+) -> Tuple[py.path.local, Optional[str], Any]:
     dirs = get_dirs_from_args(args)
     if inifile:
         iniconfig = py.iniconfig.IniConfig(inifile)

src/_pytest/doctest.py

@@ -308,7 +308,7 @@ class DoctestItem(pytest.Item):
         else:
             return super().repr_failure(excinfo)
 
-    def reportinfo(self) -> Tuple[str, int, str]:
+    def reportinfo(self) -> Tuple[py.path.local, int, str]:
         return self.fspath, self.dtest.lineno, "[doctest] %s" % self.name
 
 

src/_pytest/fixtures.py

@@ -351,7 +351,7 @@ class FixtureRequest:
         self.fixturename = None
         #: Scope string, one of "function", "class", "module", "session"
         self.scope = "function"
-        self._fixture_defs = {}  # argname -> FixtureDef
+        self._fixture_defs = {}  # type: Dict[str, FixtureDef]
         fixtureinfo = pyfuncitem._fixtureinfo
         self._arg2fixturedefs = fixtureinfo.name2fixturedefs.copy()
         self._arg2index = {}
@@ -426,7 +426,8 @@ class FixtureRequest:
     @scopeproperty()
     def fspath(self) -> py.path.local:
         """ the file system path of the test module which collected this test. """
-        return self._pyfuncitem.fspath
+        # TODO: Remove ignore once _pyfuncitem is properly typed.
+        return self._pyfuncitem.fspath  # type: ignore
 
     @property
     def keywords(self):
@@ -549,7 +550,9 @@ class FixtureRequest:
                 source_lineno = frameinfo.lineno
                 source_path = py.path.local(source_path)
                 if source_path.relto(funcitem.config.rootdir):
-                    source_path = source_path.relto(funcitem.config.rootdir)
+                    source_path_str = source_path.relto(funcitem.config.rootdir)
+                else:
+                    source_path_str = str(source_path)
                 msg = (
                     "The requested fixture has no parameter defined for test:\n"
                     "    {}\n\n"
@@ -558,7 +561,7 @@ class FixtureRequest:
                         funcitem.nodeid,
                         fixturedef.argname,
                         getlocation(fixturedef.func, funcitem.config.rootdir),
-                        source_path,
+                        source_path_str,
                         source_lineno,
                     )
                 )

src/_pytest/main.py

@@ -367,9 +367,9 @@ class Failed(Exception):
 
 @attr.s
 class _bestrelpath_cache(dict):
-    path = attr.ib()
+    path = attr.ib(type=py.path.local)
 
-    def __missing__(self, path: str) -> str:
+    def __missing__(self, path: py.path.local) -> str:
         r = self.path.bestrelpath(path)  # type: str
         self[path] = r
         return r
@@ -399,7 +399,7 @@ class Session(nodes.FSCollector):
         self._node_cache = {}
         self._bestrelpathcache = _bestrelpath_cache(
             config.rootdir
-        )  # type: Dict[str, str]
+        )  # type: Dict[py.path.local, str]
         # Dirnames of pkgs with dunder-init files.
         self._pkg_roots = {}
 
@@ -414,7 +414,7 @@ class Session(nodes.FSCollector):
             self.testscollected,
         )
 
-    def _node_location_to_relpath(self, node_path: str) -> str:
+    def _node_location_to_relpath(self, node_path: py.path.local) -> str:
         # bestrelpath is a quite slow function
         return self._bestrelpathcache[node_path]
 

src/_pytest/nodes.py

@@ -462,6 +462,7 @@ class Item(Node):
     @cached_property
     def location(self) -> Tuple[str, Optional[int], str]:
         location = self.reportinfo()
+        assert isinstance(location[0], py.path.local), location[0]
         fspath = self.session._node_location_to_relpath(location[0])
         assert type(location[2]) is str
         return (fspath, location[1], location[2])

testing/python/collect.py

@@ -1018,10 +1018,10 @@ class TestReportInfo:
     def test_itemreport_reportinfo(self, testdir):
         testdir.makeconftest(
             """
-            import pytest
+            import pytest, py
             class MyFunction(pytest.Function):
                 def reportinfo(self):
-                    return "ABCDE", 42, "custom"
+                    return py.path.local("foo"), 42, "custom"
             def pytest_pycollect_makeitem(collector, name, obj):
                 if name == "test_func":
                     return MyFunction(name, parent=collector)
@@ -1029,7 +1029,7 @@ class TestReportInfo:
         )
         item = testdir.getitem("def test_func(): pass")
         item.config.pluginmanager.getplugin("runner")
-        assert item.location == ("ABCDE", 42, "custom")
+        assert item.location == ("foo", 42, "custom")
 
     def test_func_reportinfo(self, testdir):
         item = testdir.getitem("def test_func(): pass")