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Testing Git Remove Command Modifications in thefuck

A comprehensive test suite for validating git rm command behavior with local modifications in the thefuck project. The tests specifically verify error handling and command suggestions when attempting to remove files with local changes.

Test Coverage Overview

The test suite provides thorough coverage of the git_rm_local_modifications rule functionality.

Key areas tested include:

Matching error patterns for modified files
Command suggestions for both –cached and force removal options
Multiple file handling scenarios
Edge cases with empty outputs

Implementation Analysis

The testing approach uses pytest’s parametrize feature to efficiently test multiple input combinations. The implementation follows fixture-based testing patterns with dedicated test cases for matching logic and command generation.

Technical patterns include:

Fixture usage for output generation
Parametrized test cases
Command object handling
Boolean assertion testing

Technical Details

Testing tools and configuration:

pytest as the primary testing framework
Custom Command type for input handling
Parametrize decorator for test case multiplication
Fixture-based test data generation
Standard pytest assertions

Best Practices Demonstrated

The test suite exemplifies several testing best practices in Python. It demonstrates clear separation of concerns, efficient test case organization, and comprehensive coverage of functionality.

Notable practices include:

Isolated test cases for match and command generation
Reusable fixtures
Parametrized test cases for multiple scenarios
Clear test function naming
Focused test scope per function

nvbn/thefuck

tests/rules/test_git_rm_local_modifications.py

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


@pytest.fixture
def output(target):
    return ('error: the following file has local modifications:
    {}
(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