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Testing Git Staged File Removal Handling in TheFuck

This test suite validates the functionality of the git_rm_staged rule in TheFuck, which handles error scenarios when attempting to remove files that have staged changes in Git. The tests ensure proper command suggestions are provided when users encounter Git removal conflicts.

Test Coverage Overview

The test suite provides comprehensive coverage for the git_rm_staged rule functionality.

Key areas tested include:

Matching error patterns for files with staged changes
Command parsing for single and multiple file scenarios
Generation of alternative commands with –cached and -f options

Edge cases cover both single and multiple file operations, ensuring robust handling of various Git remove scenarios.

Implementation Analysis

The testing approach uses pytest’s parametrize feature to efficiently test multiple input combinations and expected outcomes.

Notable patterns include:

Fixture usage for consistent error output generation
Parametrized test cases for varied input scenarios
Separate test cases for matching and command generation

The implementation leverages pytest’s built-in assertion mechanisms for clean, maintainable test code.

Technical Details

Testing tools and configuration:

pytest as the primary testing framework
Custom Command type from thefuck.types
Fixtures for standardized test data
Parametrized test functions for multiple test cases

Best Practices Demonstrated

The test suite exemplifies several testing best practices in Python.

Notable practices include:

Separation of concerns between match and command generation tests
Consistent use of fixtures for test data
Comprehensive negative testing scenarios
Clear test function naming conventions
Efficient test case organization using parametrization

nvbn/thefuck

tests/rules/test_git_rm_staged.py

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


@pytest.fixture
def output(target):
    return ('error: the following file has changes staged in the index:
    {}
(use '
            '--cached to keep the file, or -f to force removal)').format(target)


@pytest.mark.parametrize('script, target', [
    ('git rm foo', 'foo'),
    ('git rm foo bar', 'bar')])
def test_match(output, script, target):
    assert match(Command(script, output))


@pytest.mark.parametrize('script', ['git rm foo', 'git rm foo bar', 'git rm'])
def test_not_match(script):
    assert not match(Command(script, ''))


@pytest.mark.parametrize('script, target, new_command', [
    ('git rm foo', 'foo', ['git rm --cached foo', 'git rm -f foo']),
    ('git rm foo bar', 'bar', ['git rm --cached foo bar', 'git rm -f foo bar'])])
def test_get_new_command(output, script, target, new_command):
    assert get_new_command(Command(script, output)) == new_command