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Testing Homebrew Uninstall Command Correction in TheFuck

This test suite validates the functionality of the Homebrew uninstall command correction feature in TheFuck utility. It focuses on testing the behavior when multiple versions of a package are installed and ensures proper handling of the –force flag recommendation.

Test Coverage Overview

The test suite provides comprehensive coverage of the brew uninstall command correction logic.

Key areas tested include:

Multiple package version detection
Force flag recommendation scenarios
Various command aliases (uninstall, rm, remove)
Negative test cases for non-matching scenarios

Implementation Analysis

The implementation uses pytest’s parametrize feature to test multiple command variations efficiently. The testing approach leverages fixtures for common test data and implements separate test functions for matching and non-matching scenarios.

Key patterns include:

Fixture-based test data management
Parametrized test cases
Command object validation
Boolean assertion testing

Technical Details

Testing tools and configuration:

pytest framework for test organization
Command type from thefuck.types
Fixture decorators for reusable test data
Parametrize markers for multiple test cases
Assert statements for validation

Best Practices Demonstrated

The test suite exemplifies several testing best practices in Python.

Notable practices include:

Separation of test data using fixtures
Clear test function naming conventions
Efficient test case parameterization
Comprehensive positive and negative testing
Modular test organization

nvbn/thefuck

tests/rules/test_brew_uninstall.py

            
import pytest
from thefuck.types import Command
from thefuck.rules.brew_uninstall import get_new_command, match


@pytest.fixture
def output():
    return ("Uninstalling /usr/local/Cellar/tbb/4.4-20160916... (118 files, 1.9M)
"
            "tbb 4.4-20160526, 4.4-20160722 are still installed.
"
            "Remove all versions with `brew uninstall --force tbb`.
")


@pytest.fixture
def new_command(formula):
    return 'brew uninstall --force {}'.format(formula)


@pytest.mark.parametrize('script', ['brew uninstall tbb', 'brew rm tbb', 'brew remove tbb'])
def test_match(output, script):
    assert match(Command(script, output))


@pytest.mark.parametrize('script', ['brew remove gnuplot'])
def test_not_match(script):
    output = 'Uninstalling /usr/local/Cellar/gnuplot/5.0.4_1... (44 files, 2.3M)
'
    assert not match(Command(script, output))


@pytest.mark.parametrize('script, formula, ', [('brew uninstall tbb', 'tbb')])
def test_get_new_command(output, new_command, script, formula):
    assert get_new_command(Command(script, output)) == new_command