Add is_file_in_dir helper function

freqtrade/misc.py

@@ -116,6 +116,13 @@ def file_load_json(file: Path):
     return pairdata
 
 
+def is_file_in_dir(file: Path, directory: Path) -> bool:
+    """
+    Helper function to check if file is in directory.
+    """
+    return file.is_file() and file.parent.samefile(directory)
+
+
 def pair_to_filename(pair: str) -> str:
     for ch in ['/', ' ', '.', '@', '$', '+', ':']:
         pair = pair.replace(ch, '_')

tests/test_misc.py

@@ -8,7 +8,7 @@ import pandas as pd
 import pytest
 
 from freqtrade.misc import (dataframe_to_json, decimals_per_coin, deep_merge_dicts, file_dump_json,
-                            file_load_json, json_to_dataframe, pair_to_filename,
+                            file_load_json, is_file_in_dir, json_to_dataframe, pair_to_filename,
                             parse_db_uri_for_logging, plural, render_template,
                             render_template_with_fallback, round_coin_value, safe_value_fallback,
                             safe_value_fallback2)
@@ -64,6 +64,24 @@ def test_file_load_json(mocker, testdatadir) -> None:
     assert ret
 
 
+def test_is_file_in_dir(tmp_path):
+
+    # Create a temporary directory and file
+    dir_path = tmp_path / "subdir"
+    dir_path.mkdir()
+    file_path = dir_path / "test.txt"
+    file_path.touch()
+
+    # Test that the function returns True when the file is in the directory
+    assert is_file_in_dir(file_path, dir_path) is True
+
+    # Test that the function returns False when the file is not in the directory
+    assert is_file_in_dir(file_path, tmp_path) is False
+
+    file_path2 = tmp_path / "../../test2.txt"
+    assert is_file_in_dir(file_path2, tmp_path) is False
+
+
 @pytest.mark.parametrize("pair,expected_result", [
     ("ETH/BTC", 'ETH_BTC'),
     ("ETH/USDT", 'ETH_USDT'),