Set permissions on JSON files (#2093)

* Set 600 premissions on json files

* Add test

* Fix local tar tests

* Fix tar test in action

* Use pytest fixture for tmp_path in tests

* remove not needed things

tests/utils/test_json.py

@@ -0,0 +1,20 @@
+"""test json."""
+from supervisor.utils.json import write_json_file
+
+
+def test_file_permissions(tmp_path):
+    """Test file permissions."""
+    tempfile = tmp_path / "test.json"
+    write_json_file(tempfile, {"test": "data"})
+    assert tempfile.is_file()
+    assert oct(tempfile.stat().st_mode)[-3:] == "600"
+
+
+def test_new_file_permissions(tmp_path):
+    """Test file permissions."""
+    tempfile = tmp_path / "test.json"
+    tempfile.write_text("test")
+    assert oct(tempfile.stat().st_mode)[-3:] != "600"
+
+    write_json_file(tempfile, {"test": "data"})
+    assert oct(tempfile.stat().st_mode)[-3:] == "600"