Updated script that can be controled by Nodejs web app

lib/python3.13/site-packages/pandas/tests/io/formats/test_console.py

@@ -0,0 +1,72 @@
+import locale
+
+import pytest
+
+from pandas._config import detect_console_encoding
+
+
+class MockEncoding:
+    """
+    Used to add a side effect when accessing the 'encoding' property. If the
+    side effect is a str in nature, the value will be returned. Otherwise, the
+    side effect should be an exception that will be raised.
+    """
+
+    def __init__(self, encoding) -> None:
+        super().__init__()
+        self.val = encoding
+
+    @property
+    def encoding(self):
+        return self.raise_or_return(self.val)
+
+    @staticmethod
+    def raise_or_return(val):
+        if isinstance(val, str):
+            return val
+        else:
+            raise val
+
+
+@pytest.mark.parametrize("empty,filled", [["stdin", "stdout"], ["stdout", "stdin"]])
+def test_detect_console_encoding_from_stdout_stdin(monkeypatch, empty, filled):
+    # Ensures that when sys.stdout.encoding or sys.stdin.encoding is used when
+    # they have values filled.
+    # GH 21552
+    with monkeypatch.context() as context:
+        context.setattr(f"sys.{empty}", MockEncoding(""))
+        context.setattr(f"sys.{filled}", MockEncoding(filled))
+        assert detect_console_encoding() == filled
+
+
+@pytest.mark.parametrize("encoding", [AttributeError, OSError, "ascii"])
+def test_detect_console_encoding_fallback_to_locale(monkeypatch, encoding):
+    # GH 21552
+    with monkeypatch.context() as context:
+        context.setattr("locale.getpreferredencoding", lambda: "foo")
+        context.setattr("sys.stdout", MockEncoding(encoding))
+        assert detect_console_encoding() == "foo"
+
+
+@pytest.mark.parametrize(
+    "std,locale",
+    [
+        ["ascii", "ascii"],
+        ["ascii", locale.Error],
+        [AttributeError, "ascii"],
+        [AttributeError, locale.Error],
+        [OSError, "ascii"],
+        [OSError, locale.Error],
+    ],
+)
+def test_detect_console_encoding_fallback_to_default(monkeypatch, std, locale):
+    # When both the stdout/stdin encoding and locale preferred encoding checks
+    # fail (or return 'ascii', we should default to the sys default encoding.
+    # GH 21552
+    with monkeypatch.context() as context:
+        context.setattr(
+            "locale.getpreferredencoding", lambda: MockEncoding.raise_or_return(locale)
+        )
+        context.setattr("sys.stdout", MockEncoding(std))
+        context.setattr("sys.getdefaultencoding", lambda: "sysDefaultEncoding")
+        assert detect_console_encoding() == "sysDefaultEncoding"