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Testing System SSL and IDNA Version Handling in Requests Library

This test suite validates the system SSL configuration and IDNA version handling in the Requests library’s help module. It ensures proper version reporting and graceful handling of missing version attributes.

Test Coverage Overview

The test suite covers critical system SSL and IDNA version reporting functionality in the Requests library.

Key areas tested include:

System SSL version verification
IDNA package version detection
Graceful handling of missing IDNA version attributes
Version string formatting and validation

Implementation Analysis

The implementation uses Python’s unittest.mock framework for dependency isolation and version simulation. The tests employ mock patching to validate different IDNA package scenarios, ensuring robust version reporting regardless of package configuration.

Testing patterns include:

Mock object injection for version control
Assertion-based verification
Custom class simulation for version attributes

Technical Details

Testing tools and configuration:

unittest.mock for dependency mocking
Custom VersionedPackage class for version simulation
Python’s assert statements for validation
requests.help module integration

Best Practices Demonstrated

The test suite demonstrates several testing best practices including isolated test cases, proper mock usage, and comprehensive edge case handling. Each test focuses on a specific functionality aspect with clear setup and assertions.

Notable practices:

Clean test isolation using mock contexts
Clear test case documentation
Explicit version handling scenarios
Defensive testing for missing attributes

psf/requests

tests/test_help.py

            
from unittest import mock

from requests.help import info


def test_system_ssl():
    """Verify we're actually setting system_ssl when it should be available."""
    assert info()["system_ssl"]["version"] != ""


class VersionedPackage:
    def __init__(self, version):
        self.__version__ = version


def test_idna_without_version_attribute():
    """Older versions of IDNA don't provide a __version__ attribute, verify
    that if we have such a package, we don't blow up.
    """
    with mock.patch("requests.help.idna", new=None):
        assert info()["idna"] == {"version": ""}


def test_idna_with_version_attribute():
    """Verify we're actually setting idna version when it should be available."""
    with mock.patch("requests.help.idna", new=VersionedPackage("2.6")):
        assert info()["idna"] == {"version": "2.6"}