⚡️ Speed up function _stream_is_misconfigured by 131%

[codeflash-ai]

📄 131% (1.31x) speedup for _stream_is_misconfigured in src/click/_compat.py

⏱️ Runtime : 66.0 microseconds → 28.6 microseconds (best of 108 runs)

📝 Explanation and details

1. Direct Comparison During Codec Lookup:

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 23 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	✅ 1 Passed
📊 Tests Coverage	100.0%

🌀 Generated Regression Tests Details

from __future__ import annotations

import codecs
import io
import typing as t

# imports
import pytest  # used for our unit tests
from src.click._compat import _stream_is_misconfigured

# unit tests



def test_no_encoding_attribute():
    """Test streams with no encoding attribute."""
    stream = io.StringIO()
    codeflash_output = _stream_is_misconfigured(stream)





from __future__ import annotations

import codecs
import typing as t
from io import StringIO

# imports
import pytest  # used for our unit tests
from src.click._compat import _stream_is_misconfigured

# unit tests

# Helper class to simulate streams with various encoding attributes
class CustomStream:
    def __init__(self, encoding):
        self.encoding = encoding

@pytest.mark.parametrize("encoding, expected", [
    # Basic Test Cases
    ("ascii", True),  # Explicit ASCII encoding
    ("ASCII", True),  # Explicit ASCII encoding with different case
    ("utf-8", False),  # Non-ASCII encoding
    ("latin-1", False),  # Non-ASCII encoding
    ("utf-16", False),  # Non-ASCII encoding

    # Edge Test Cases
    (None, True),  # No encoding attribute, should default to ASCII
    ("invalid-encoding", False),  # Invalid encoding string
    ("", False),  # Empty string as encoding
    (123, False),  # Non-string encoding (integer)
    (["utf-8"], False),  # Non-string encoding (list)
    (" utf-8 ", False),  # Encoding with leading/trailing whitespace

    # Rare or Unexpected Edge Cases
    (lambda: "ascii", False),  # Encoding as a callable returning "ascii"
    (lambda: "utf-8", False),  # Encoding as a callable returning "utf-8"
    (b"ascii", False),  # Encoding as a byte string
    (b"utf-8", False),  # Encoding as a byte string
    ("utf-8😊", False),  # Non-standard string encoding
    ("utf-\x38", False),  # Encoding with escape sequences
])
def test_stream_is_misconfigured(encoding, expected):
    # Create a custom stream object with the specified encoding
    stream = CustomStream(encoding)
    # Assert that the function returns the expected result
    codeflash_output = _stream_is_misconfigured(stream)

def test_stream_with_property_encoding():
    class StreamWithProperty:
        @property
        def encoding(self):
            return "ascii"
    stream = StreamWithProperty()
    codeflash_output = _stream_is_misconfigured(stream)

    class StreamWithPropertyUTF8:
        @property
        def encoding(self):
            return "utf-8"
    stream = StreamWithPropertyUTF8()
    codeflash_output = _stream_is_misconfigured(stream)

def test_stream_with_dynamic_encoding():
    class StreamWithDynamicEncoding:
        def __init__(self):
            self._toggle = False

        @property
        def encoding(self):
            self._toggle = not self._toggle
            return "ascii" if self._toggle else "utf-8"

    stream = StreamWithDynamicEncoding()

def test_stream_with_custom_object_encoding():
    class CustomObject:
        def __str__(self):
            return "ascii"

    stream = CustomStream(CustomObject())
    codeflash_output = _stream_is_misconfigured(stream)

    class CustomObjectUTF8:
        def __str__(self):
            return "utf-8"

    stream = CustomStream(CustomObjectUTF8())
    codeflash_output = _stream_is_misconfigured(stream)

# Large Scale Test Cases


from src.click._compat import _stream_is_misconfigured
from typing import TextIO

def test__stream_is_misconfigured():
    assert _stream_is_misconfigured(TextIO()) == True

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