added --empty-object-with-newline formatting and checking

pre_commit_hooks/pretty_format_json.py

@@ -2,9 +2,8 @@ from __future__ import annotations
 
 import argparse
 import json
-import sys
 import re
-
+import sys
 from difflib import unified_diff
 from typing import Mapping
 from typing import Sequence
@@ -129,7 +128,7 @@ def main(argv: Sequence[str] | None = None) -> int:
             pretty_contents = _get_pretty_format(
                 contents, args.indent, ensure_ascii=not args.no_ensure_ascii,
                 sort_keys=not args.no_sort_keys, top_keys=args.top_keys,
-                empty_object_with_newline=args.empty_object_with_newline
+                empty_object_with_newline=args.empty_object_with_newline,
             )
         except ValueError:
             print(
@@ -148,7 +147,6 @@ def main(argv: Sequence[str] | None = None) -> int:
                 diff_output = get_diff(contents, pretty_contents, json_file)
                 sys.stdout.buffer.write(diff_output.encode())
 
-
     return status
 
 

tests/pretty_format_json_test.py

@@ -1,10 +1,10 @@
 from __future__ import annotations
 
+import filecmp
 import os
 import shutil
 
 import pytest
-import filecmp
 
 from pre_commit_hooks.pretty_format_json import main
 from pre_commit_hooks.pretty_format_json import parse_num_to_int
@@ -142,8 +142,8 @@ def test_diffing_output(capsys):
 
 def test_empty_object_with_newline(tmpdir):
     # same line objects shoud trigger with --empty-object-with-newline switch
-    sameline = get_resource_path("empty_object_json_sameline.json")
-    ret = main(["--empty-object-with-newline", str(sameline)])
+    sameline = get_resource_path('empty_object_json_sameline.json')
+    ret = main(['--empty-object-with-newline', str(sameline)])
     assert ret == 1
 
     # a template to be compared against.