File: //opt/gsutil/third_party/charset_normalizer/tests/test_preemptive_detection.py
import pytest
from charset_normalizer.utils import any_specified_encoding
from charset_normalizer import CharsetMatch
@pytest.mark.parametrize(
"payload, expected_encoding",
[
(b'<?xml version="1.0" encoding="EUC-JP"?>', "euc_jp"),
(b'<html><head><meta charset="utf-8"></head></html>', "utf_8"),
(b'<html><head><meta charset="utf-57"></head></html>', None),
(b'# coding: utf-8', "utf_8"),
(b'<?xml version="1.0" encoding="UTF-8"?>', 'utf_8'),
(b'<?xml version="1.0" encoding="US-ASCII"?>', 'ascii'),
(b'<?xml version="1.0" encoding="JohaB"?>', 'johab'),
(b'<?xml version="1.0" encoding="ibm037"?>', 'cp037'),
(b'<html><head><meta charset=WINDOWS-1252></head></html>', "cp1252"),
(b'<html><head><meta charset="WINDOWS-1256"></head></html>', "cp1256"),
]
)
def test_detect_most_common_body_encoding(payload, expected_encoding):
specified_encoding = any_specified_encoding(
payload
)
assert specified_encoding == expected_encoding, "Unable to determine properly encoding from given body"
@pytest.mark.parametrize(
"payload, expected_outcome",
[
(b'<?xml version="1.0" encoding="EUC-JP"?>', b'<?xml version="1.0" encoding="utf_8"?>'),
(b'<html><head><meta charset="utf-8"></head></html>', b'<html><head><meta charset="utf-8"></head></html>'),
(b'<html><head><meta charset="utf-57"></head></html>', b'<html><head><meta charset="utf-57"></head></html>'),
(b'# coding: utf-8', b'# coding: utf-8'),
(b'<?xml version="1.0" encoding="UTF-8"?>', b'<?xml version="1.0" encoding="UTF-8"?>'),
(b'<?xml version="1.0" encoding="US-ASCII"?>', b'<?xml version="1.0" encoding="utf_8"?>'),
(b'<?xml version="1.0" encoding="JohaB"?>', b'<?xml version="1.0" encoding="utf_8"?>'),
(b'<html><head><meta charset=WINDOWS-1252></head></html>', b'<html><head><meta charset=utf_8></head></html>'),
(b'<html><head><meta charset="WINDOWS-1256"></head></html>', b'<html><head><meta charset="utf_8"></head></html>'),
]
)
def test_preemptive_mark_replacement(payload, expected_outcome):
"""
When generating (to Unicode converted) bytes, we want to change any potential declarative charset
to utf-8. This test that.
"""
specified_encoding = any_specified_encoding(
payload
)
detected_encoding = specified_encoding if specified_encoding is not None else "utf-8"
m = CharsetMatch(
payload,
detected_encoding,
0.,
False,
[],
preemptive_declaration=specified_encoding,
)
transformed_output = m.output()
assert transformed_output == expected_outcome