fix(win): Prevent exception on empty list

Add check for when an empty list remains after preprocessing and do
not continue for both legacy and modern windows implementations.

Fix #71

send2trash/win/legacy.py

@@ -6,6 +6,7 @@
 
 from __future__ import unicode_literals
 import os.path as op
+
 from send2trash.compat import text_type
 from send2trash.util import preprocess_paths
 
@@ -142,6 +143,8 @@ def get_short_path_name(long_name):
 
 def send2trash(paths):
     paths = preprocess_paths(paths)
+    if not paths:
+        return
     # convert data type
     paths = [text_type(path, "mbcs") if not isinstance(path, text_type) else path for path in paths]
     # convert to full paths

send2trash/win/modern.py

@@ -17,6 +17,8 @@ from send2trash.win.IFileOperationProgressSink import create_sink
 
 def send2trash(paths):
     paths = preprocess_paths(paths)
+    if not paths:
+        return
     # convert data type
     paths = [text_type(path, "mbcs") if not isinstance(path, text_type) else path for path in paths]
     # convert to full paths

tests/test_plat_win.py

@@ -204,3 +204,17 @@ def test_trash_long_multifile_legacy(longfiles):
 #     )
 #     def test_trash_long_folder_legacy(self):
 #         self._trash_folder(s2t_legacy)
+
+
+def test_trash_nothing_legacy():
+    try:
+        s2t_legacy([])
+    except Exception as ex:
+        assert False, f"Exception thrown when trashing nothing: {ex}"
+
+
+def test_trash_nothing_modern():
+    try:
+        s2t_modern([])
+    except Exception as ex:
+        assert False, f"Exception thrown when trashing nothing: {ex}"