Back to Repositories

Testing Java Compilation Command Correction in TheFuck

This test suite validates the javac rule functionality in TheFuck project, focusing on command correction for Java compilation errors. The tests ensure proper handling of file extension addition when compiling Java source files.

Test Coverage Overview

The test suite provides comprehensive coverage of the javac command correction functionality.

Key areas tested include:

Command matching for javac operations
Automatic .java extension addition
Multiple input variations with different filenames

Integration points focus on the command parsing and correction pipeline.

Implementation Analysis

The testing approach utilizes pytest’s parametrize decorator for efficient test case handling. The implementation follows a clear pattern of separating matching logic from command correction logic, using pytest’s built-in assertion mechanisms for validation.

Framework features leveraged include:

Parametrized test cases
Command object handling
Discrete test functions for specific behaviors

Technical Details

Testing infrastructure includes:

Pytest testing framework
Custom Command type implementation
Parametrized test decorators
Mock command inputs and expected outputs

Best Practices Demonstrated

The test suite exemplifies several testing best practices in Python unit testing. It demonstrates clear separation of concerns between matching and command generation, uses parameterized testing for multiple scenarios, and maintains focused test cases.

Notable practices include:

Isolated test functions
Comprehensive input coverage
Clear test case organization
Efficient test parametrization

nvbn/thefuck

tests/rules/test_javac.py

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


@pytest.mark.parametrize('command', [
    Command('javac foo', ''),
    Command('javac bar', '')])
def test_match(command):
    assert match(command)


@pytest.mark.parametrize('command, new_command', [
    (Command('javac foo', ''), 'javac foo.java'),
    (Command('javac bar', ''), 'javac bar.java')])
def test_get_new_command(command, new_command):
    assert get_new_command(command) == new_command