import locale
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import pytest
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from pandas._config import detect_console_encoding
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class MockEncoding:
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"""
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Used to add a side effect when accessing the 'encoding' property. If the
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side effect is a str in nature, the value will be returned. Otherwise, the
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side effect should be an exception that will be raised.
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"""
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def __init__(self, encoding) -> None:
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super().__init__()
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self.val = encoding
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@property
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def encoding(self):
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return self.raise_or_return(self.val)
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@staticmethod
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def raise_or_return(val):
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if isinstance(val, str):
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return val
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else:
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raise val
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@pytest.mark.parametrize("empty,filled", [["stdin", "stdout"], ["stdout", "stdin"]])
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def test_detect_console_encoding_from_stdout_stdin(monkeypatch, empty, filled):
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# Ensures that when sys.stdout.encoding or sys.stdin.encoding is used when
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# they have values filled.
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# GH 21552
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with monkeypatch.context() as context:
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context.setattr(f"sys.{empty}", MockEncoding(""))
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context.setattr(f"sys.{filled}", MockEncoding(filled))
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assert detect_console_encoding() == filled
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@pytest.mark.parametrize("encoding", [AttributeError, OSError, "ascii"])
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def test_detect_console_encoding_fallback_to_locale(monkeypatch, encoding):
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# GH 21552
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with monkeypatch.context() as context:
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context.setattr("locale.getpreferredencoding", lambda: "foo")
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context.setattr("sys.stdout", MockEncoding(encoding))
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assert detect_console_encoding() == "foo"
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@pytest.mark.parametrize(
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"std,locale",
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[
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["ascii", "ascii"],
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["ascii", locale.Error],
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[AttributeError, "ascii"],
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[AttributeError, locale.Error],
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[OSError, "ascii"],
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[OSError, locale.Error],
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],
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)
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def test_detect_console_encoding_fallback_to_default(monkeypatch, std, locale):
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# When both the stdout/stdin encoding and locale preferred encoding checks
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# fail (or return 'ascii', we should default to the sys default encoding.
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# GH 21552
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with monkeypatch.context() as context:
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context.setattr(
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"locale.getpreferredencoding", lambda: MockEncoding.raise_or_return(locale)
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)
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context.setattr("sys.stdout", MockEncoding(std))
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context.setattr("sys.getdefaultencoding", lambda: "sysDefaultEncoding")
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assert detect_console_encoding() == "sysDefaultEncoding"
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