Add more tests on module utils.paths

Author: jinningwang

tests/test_paths.py

@@ -43,6 +43,7 @@ def test_no_fullname(self):
 
         dir_path, only_file_name = os.path.split(path)
         self.assertTrue(os.path.exists(dir_path))
+        self.assertIsNotNone(only_file_name)
 
     def test_no_path(self):
         """
@@ -55,6 +56,7 @@ def test_no_path(self):
 
         dir_path, only_file_name = os.path.split(path)
         self.assertTrue(os.path.exists(dir_path))
+        self.assertIsNotNone(only_file_name)
 
     def test_current_path(self):
         """
@@ -67,3 +69,17 @@ def test_current_path(self):
 
         dir_path, only_file_name = os.path.split(path)
         self.assertTrue(os.path.exists(dir_path))
+        self.assertIsNotNone(only_file_name)
+
+    def test_path_with_file_name(self):
+        """
+        Test export path with path and file name specified.
+        """
+        path, file_name = get_export_path(self.ss,
+                                          'DCOPF',
+                                          path='./test_export.csv',
+                                          fmt='csv',)
+
+        dir_path, only_file_name = os.path.split(path)
+        self.assertTrue(os.path.exists(dir_path))
+        self.assertEqual(only_file_name, 'test_export.csv')