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Testing Git Rebase No-Changes Detection in thefuck

This test suite validates the git rebase no changes functionality in thefuck command-line tool. It specifically tests the behavior when a rebase operation encounters patches with no changes and ensures proper command suggestions are provided.

Test Coverage Overview

The test suite provides comprehensive coverage of the git rebase no changes scenario, focusing on command matching and response generation.

Tests command matching for ‘git rebase –continue’ with no-changes output
Verifies negative matching cases for empty output and skip commands
Ensures correct suggestion of ‘git rebase –skip’ command

Implementation Analysis

The testing approach uses pytest fixtures to simulate git rebase output scenarios. It implements a modular pattern with separate test functions for matching logic and command generation.

Uses pytest’s fixture decoration for reusable test data
Implements discrete test functions for specific functionality
Employs Command type for structured input handling

Technical Details

Testing Framework: pytest
Custom Types: Command class from thefuck.types
Test Components: match() and get_new_command() functions
Fixture Setup: Simulated git rebase output

Best Practices Demonstrated

The test suite demonstrates strong testing practices through clear separation of concerns and comprehensive edge case coverage.

Isolated test cases for different functionalities
Clear test data setup using fixtures
Both positive and negative test scenarios
Explicit assertion statements

nvbn/thefuck

tests/rules/test_git_rebase_no_changes.py

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


@pytest.fixture
def output():
    return '''Applying: Test commit
No changes - did you forget to use 'git add'?
If there is nothing left to stage, chances are that something else
already introduced the same changes; you might want to skip this patch.

When you have resolved this problem, run "git rebase --continue".
If you prefer to skip this patch, run "git rebase --skip" instead.
To check out the original branch and stop rebasing, run "git rebase --abort".

'''


def test_match(output):
    assert match(Command('git rebase --continue', output))
    assert not match(Command('git rebase --continue', ''))
    assert not match(Command('git rebase --skip', ''))


def test_get_new_command(output):
    assert (get_new_command(Command('git rebase --continue', output)) ==
            'git rebase --skip')