Use importorskip to detect/load win32com

setuptools/tests/test_sandbox.py

@@ -6,22 +6,12 @@ import shutil
 import tempfile
 import types
 
+import pytest
+
 import pkg_resources
 import setuptools.sandbox
 from setuptools.sandbox import DirectorySandbox, SandboxViolation
 
-def has_win32com():
-    """
-    Run this to determine if the local machine has win32com, and if it
-    does, include additional tests.
-    """
-    if not sys.platform.startswith('win32'):
-        return False
-    try:
-        __import__('win32com')
-    except ImportError:
-        return False
-    return True
 
 class TestSandbox:
 
@@ -44,23 +34,22 @@ class TestSandbox:
 
     _file_writer = staticmethod(_file_writer)
 
-    if has_win32com():
-        def test_win32com(self):
-            """
-            win32com should not be prevented from caching COM interfaces
-            in gen_py.
-            """
-            import win32com
-            gen_py = win32com.__gen_path__
-            target = os.path.join(gen_py, 'test_write')
-            sandbox = DirectorySandbox(self.dir)
+    def test_win32com(self):
+        """
+        win32com should not be prevented from caching COM interfaces
+        in gen_py.
+        """
+        win32com = pytest.importorskip('win32com')
+        gen_py = win32com.__gen_path__
+        target = os.path.join(gen_py, 'test_write')
+        sandbox = DirectorySandbox(self.dir)
+        try:
             try:
-                try:
-                    sandbox.run(self._file_writer(target))
-                except SandboxViolation:
-                    self.fail("Could not create gen_py file due to SandboxViolation")
-            finally:
-                if os.path.exists(target): os.remove(target)
+                sandbox.run(self._file_writer(target))
+            except SandboxViolation:
+                self.fail("Could not create gen_py file due to SandboxViolation")
+        finally:
+            if os.path.exists(target): os.remove(target)
 
     def test_setup_py_with_BOM(self):
         """