Coverage for structured_tutorials / models / validators.py: 100%

1# Copyright (c) 2025 Mathias Ertl 

2# Licensed under the MIT License. See LICENSE file for details. 

3 

4"""Validators for various models.""" 

5 

6import re 

7from pathlib import Path 

8from typing import Any 

9 

10from pydantic import NonNegativeInt 

11 

12 

13def validate_regex(value: Any) -> Any: 

14 """Validate and compile a regular expression.""" 

15 if isinstance(value, str): 

16 return re.compile(value.encode()) 

17 return value # pragma: no cover 

18 

19 

20def validate_relative_path(value: Path) -> Path: 

21 """Validate that a path is relative.""" 

22 if value.is_absolute(): 

23 raise ValueError(f"Path must be relative, got: {value!r}") 

24 return value 

25 

26 

27def validate_count_tuple( 

28 value: tuple[NonNegativeInt | None, NonNegativeInt | None], 

29) -> tuple[NonNegativeInt | None, NonNegativeInt | None]: 

30 """Validate that min is larger than max in a count tuple.""" 

31 count_min, count_max = value 

32 if count_min is not None and count_max is not None and count_min > count_max: 

33 raise ValueError(f"Minimum ({count_min}) is greater than maximum ({count_max}).") 

34 if count_min is None and count_max is None: 

35 raise ValueError("At least one of minimum or maximum must be specified.") 

36 return value