Add system test to reproduce issue with special characters

tests/bash_tests/test_issue_1996.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+
+import shutil
+import system_tests
+import os
+
+@system_tests.CopyTmpFiles("$data_path/Stonehenge.heic")
+class Exiv2FilePathsWithSpecialCharacters(metaclass=system_tests.CaseMeta):
+    url = "https://github.com/Exiv2/exiv2/issues/1996"
+
+    # Rename temporary file so that the path contains special Greek characters
+    original_file = system_tests.path("$tmp_path/Stonehenge.heic")
+    dst_file = system_tests.path("$tmp_path/Εκκρεμότητες.heic")
+
+    def setUp(self):
+        shutil.copyfile(self.original_file, self.dst_file)
+
+    def tearDown(self):
+        os.remove(self.original_file)
+        os.remove(self.dst_file)
+
+    commands = ["$exiv2 -K Xmp.cm2e.Father $dst_file"]
+    stdout = ["Xmp.cm2e.Father                              XmpText    11  Robin Mills\n"]
+    stderr = [""]
+    retval = [0]