Back to Repositories

Testing Directory Creation and Navigation Commands in thefuck

This test suite validates the cd_mkdir functionality in The Fuck tool, which automatically creates directories when attempting to cd into non-existent paths. The tests ensure proper handling of directory creation and navigation commands.

Test Coverage Overview

The test suite provides comprehensive coverage of the cd_mkdir rule functionality.

Key areas tested include:

Directory navigation failures detection
Various error message formats across different systems
Nested directory path handling
Command matching logic for valid and invalid scenarios

Implementation Analysis

The testing approach uses pytest’s parametrize feature to efficiently test multiple input scenarios. The implementation follows a clear pattern of testing both positive and negative cases for command matching and new command generation.

Technical implementation details:

Parametrized test cases for different error messages
Separate test functions for matching and non-matching scenarios
Command object usage for input/output validation

Technical Details

Testing infrastructure includes:

Pytest as the primary testing framework
Custom Command type for test data structuring
Parametrized test decorators for multiple test cases
Mock command inputs and error messages

Best Practices Demonstrated

The test suite exemplifies several testing best practices in Python.

Notable practices include:

Clear separation of test cases for different functionalities
Comprehensive error message pattern testing
Efficient test case organization using parametrize
Explicit assertion statements for clarity

nvbn/thefuck

tests/rules/test_cd_mkdir.py

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


@pytest.mark.parametrize('command', [
    Command('cd foo', 'cd: foo: No such file or directory'),
    Command('cd foo/bar/baz',
            'cd: foo: No such file or directory'),
    Command('cd foo/bar/baz', 'cd: can\'t cd to foo/bar/baz'),
    Command('cd /foo/bar/', 'cd: The directory "/foo/bar/" does not exist')])
def test_match(command):
    assert match(command)


@pytest.mark.parametrize('command', [
    Command('cd foo', ''), Command('', '')])
def test_not_match(command):
    assert not match(command)


@pytest.mark.parametrize('command, new_command', [
    (Command('cd foo', ''), 'mkdir -p foo && cd foo'),
    (Command('cd foo/bar/baz', ''), 'mkdir -p foo/bar/baz && cd foo/bar/baz')])
def test_get_new_command(command, new_command):
    assert get_new_command(command) == new_command