tests: add no covers for windows

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

nox/popen.py

@@ -36,9 +36,9 @@ def shutdown_process(
     with contextlib.suppress(subprocess.TimeoutExpired):
         return proc.communicate(timeout=terminate_timeout)
 
-    proc.kill()
+    proc.kill()  # pragma: win32 no cover
 
-    return proc.communicate()
+    return proc.communicate()  # pragma: win32 no cover
 
 
 def decode_output(output: bytes) -> str:

nox/virtualenv.py

@@ -237,7 +237,7 @@ def _clean_location(self) -> bool:
     def bin_paths(self) -> list[str]:
         """Returns the location of the conda env's bin folder."""
         # see https://github.com/conda/conda/blob/f60f0f1643af04ed9a51da3dd4fa242de81e32f4/conda/activate.py#L563-L572
-        if _SYSTEM == "Windows":
+        if _SYSTEM == "Windows":  # pragma: win32 cover
             return [
                 self.location,
                 os.path.join(self.location, "Library", "mingw-w64", "bin"),
@@ -247,7 +247,7 @@ def bin_paths(self) -> list[str]:
                 os.path.join(self.location, "bin"),
             ]
 
-        return [os.path.join(self.location, "bin")]
+        return [os.path.join(self.location, "bin")]  # pragma: win32 no cover
 
     def create(self) -> bool:
         """Create the conda env."""
@@ -353,7 +353,7 @@ def _check_reused_environment_type(self) -> bool:
         path = os.path.join(self.location, "pyvenv.cfg")
         if not os.path.isfile(path):
             # virtualenv < 20.0 does not create pyvenv.cfg
-            old_env = "virtualenv"
+            old_env = "virtualenv"  # pragma: win32 no cover
         else:
             pattern = re.compile("virtualenv[ \t]*=")
             with open(path) as fp:
@@ -373,7 +373,7 @@ def _check_reused_environment_interpreter(self) -> bool:
             "import sys; sys.stdout.write(getattr(sys, 'real_prefix', sys.base_prefix))"
         )
 
-        if original is None:
+        if original is None:  # pragma: win32 no cover
             output = nox.command.run(
                 [self._resolved_interpreter, "-c", program], silent=True, log=False
             )
@@ -389,7 +389,7 @@ def _check_reused_environment_interpreter(self) -> bool:
     def _read_base_prefix_from_pyvenv_cfg(self) -> str | None:
         """Return the base-prefix entry from pyvenv.cfg, if present."""
         path = os.path.join(self.location, "pyvenv.cfg")
-        if os.path.isfile(path):
+        if os.path.isfile(path):  # pragma: win32 no cover
             with open(path) as io:
                 for line in io:
                     key, _, value = line.partition("=")