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Testing Git Branch Name Mismatch Handling in thefuck

A comprehensive test suite for validating Git push behavior with different branch names in the thefuck project. The tests ensure proper handling of branch name mismatches between local and remote repositories.

Test Coverage Overview

The test suite provides thorough coverage of Git push scenarios involving mismatched branch names. It validates error handling and command generation for cases where local and remote branch names differ.

Tests branch name mismatch detection
Validates error message parsing
Covers command correction functionality
Handles various Git push scenarios

Implementation Analysis

The implementation uses pytest’s parametrize feature for comprehensive test case coverage. The testing approach focuses on both positive and negative scenarios, using mock Command objects to simulate Git push operations.

Parametrized test cases for different commands
Mock Command object implementation
Error message template validation

Technical Details

Framework: pytest
Test Type: Unit tests
Key Components: Command class, error message formatting
Mock Objects: Git command simulation
Error Message Templates: Standardized format

Best Practices Demonstrated

The test suite exemplifies several testing best practices including isolated test cases, clear naming conventions, and comprehensive edge case coverage. It demonstrates effective use of pytest features for maintainable and readable tests.

Isolated test cases
Parametrized testing
Clear test organization
Comprehensive assertion coverage

nvbn/thefuck

tests/rules/test_git_push_different_branch_names.py

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


output = """fatal: The upstream branch of your current branch does not match
the name of your current branch.  To push to the upstream branch
on the remote, use

    git push origin HEAD:%s

To push to the branch of the same name on the remote, use

    git push origin %s

To choose either option permanently, see push.default in 'git help config'.
"""


def error_msg(localbranch, remotebranch):
    return output % (remotebranch, localbranch)


def test_match():
    assert match(Command('git push', error_msg('foo', 'bar')))


@pytest.mark.parametrize('command', [
    Command('vim', ''),
    Command('git status', error_msg('foo', 'bar')),
    Command('git push', '')
])
def test_not_match(command):
    assert not match(command)


def test_get_new_command():
    new_command = get_new_command(Command('git push', error_msg('foo', 'bar')))
    assert new_command == 'git push origin HEAD:bar'