Add some checks to catch test failure

Really just checking that the setup is able to create test files so it
is known they were there then removed.
Windows tests really need verification of
recycle, which is not present.

tests/test_plat_win.py

@@ -26,6 +26,7 @@ def _create_tree(path):
 @pytest.fixture
 def testdir(tmp_path):
     dirname = "\\\\?\\" + str(tmp_path)
+    assert op.exists(dirname) is True
     yield dirname
     shutil.rmtree(dirname, ignore_errors=True)
 
@@ -34,6 +35,7 @@ def testdir(tmp_path):
 def testfile(testdir):
     file = op.join(testdir, "testfile.txt")
     _create_tree(file)
+    assert op.exists(file) is True
     yield file
     # Note dir will cleanup the file
 
@@ -42,6 +44,7 @@ def testfile(testdir):
 def testfiles(testdir):
     files = [op.join(testdir, "testfile{}.txt".format(index)) for index in range(10)]
     [_create_tree(file) for file in files]
+    assert all([op.exists(file) for file in files]) is True
     yield files
     # Note dir will cleanup the files
 
@@ -148,6 +151,7 @@ def longfile(longdir):
     path = op.join(longdir, name + "{}.txt")
     file = path.format("")
     _create_tree(file)
+    assert op.exists(file) is True
     yield file
 
 
@@ -157,11 +161,14 @@ def longfiles(longdir):
     path = op.join(longdir, name + "{}.txt")
     files = [path.format(index) for index in range(10)]
     [_create_tree(file) for file in files]
+    assert all([op.exists(file) for file in files]) is True
     yield files
 
 
-# NOTE: both legacy and modern test "pass" on windows, but actually are not moving files to the
-# recycle bin, this was tested on latest windows 10, thought to have worked previously
+# NOTE: both legacy and modern test "pass" on windows, however sometimes with the same path
+# they do not actually recycle files but delete them.  Noticed this when testing with the
+# recycle bin open, noticed later tests actually worked, modern version can actually detect
+# when this happens but not stop it at this moment, and we need a way to verify it when testing.
 def test_trash_long_file_modern(longfile):
     _trash_file(longfile, s2t_modern)