!9862 Fix the bug of ImageNetToMR

From: @shenwei41
Reviewed-by: @pandoublefeng,@liucunwei
Signed-off-by: @liucunwei

mindspore/mindrecord/shardutils.py

@@ -81,6 +81,8 @@ def check_filename(path):
         raise ParamValueError('File path is not allowed None or empty!')
     if not isinstance(path, str):
         raise ParamValueError("File path: {} is not string.".format(path))
+    if path.endswith("/"):
+        raise ParamValueError("File path can not end with '/'")
     file_name = os.path.basename(path)
 
     # '#', ':', '|', ' ', '}', '"', '+', '!', ']', '[', '\\', '`',

tests/ut/python/mindrecord/test_imagenet_to_mindrecord.py

@@ -114,3 +114,15 @@ def test_imagenet_to_mindrecord_illegal_filename(fixture_file):
                                             IMAGENET_IMAGE_DIR, filename,
                                             PARTITION_NUMBER)
         imagenet_transformer.transform()
+
+def test_imagenet_to_mindrecord_illegal_1_filename(fixture_file):
+    """
+    test transform imagenet dataset to mindrecord
+    when file name end with '/'.
+    """
+    filename = "test/path/"
+    with pytest.raises(Exception, match="File path can not end with '/'"):
+        imagenet_transformer = ImageNetToMR(IMAGENET_MAP_FILE,
+                                            IMAGENET_IMAGE_DIR, filename,
+                                            PARTITION_NUMBER)
+        imagenet_transformer.transform()