Path 1: 18 calls (0.95)

→ first_line bytes (18)

↩ return 'utf-16le' (8) 'utf-32le' (8) 'utf-16be' (1) 'utf-32be' (1)

3 run 1 not run

1def extract_codec_from_bom(first_line: bytes) -> str:
2    """Try to extract the codec (unicode only) by checking for the BOM.
3
4    For details about BOM see https://unicode.org/faq/utf_bom.html#BOM
5
6    Args:
7        first_line: the first line of a file
8
9    Returns:
10        a codec name
11
12    Raises:
13        ValueError: if no codec was found
14    """
15    for bom, codec in BOM_SORTED_TO_CODEC.items():
16        if first_line.startswith(bom):
17            return codec
18
19    raise ValueError("No BOM found. Could not detect Unicode codec.")
            

Path 2: 1 calls (0.05)

→ first_line bytes (1)

⚠ exception ValueError (1)

3 run 1 not run

1def extract_codec_from_bom(first_line: bytes) -> str:
2    """Try to extract the codec (unicode only) by checking for the BOM.
3
4    For details about BOM see https://unicode.org/faq/utf_bom.html#BOM
5
6    Args:
7        first_line: the first line of a file
8
9    Returns:
10        a codec name
11
12    Raises:
13        ValueError: if no codec was found
14    """
15    for bom, codec in BOM_SORTED_TO_CODEC.items():
16        if first_line.startswith(bom):
17            return codec
18
19    raise ValueError("No BOM found. Could not detect Unicode codec.")