Ward

See the full documentation and feature set here.

A modern Python test framework designed to help you find and fix flaws faster.

Features

Descriptive test names: describe what your tests do using strings, not function names.

@test("1 + 2 == 3")
def _():
    assert 1 + 2 == 3

Modular test dependencies: manage test setup/teardown code using fixtures that rely on Python's import system, not name matching.

@fixture
def user():
    return User(name="darren")
    
@test("the user is called darren")
def _(u=user):
    assert u.name == "darren"

Powerful test selection: limit your test run not only by matching test names/descriptions, but also on the code contained in the body of the test.

ward --search "Database.get_all_users"

Parameterised testing: write a test once, and call it multiple times with different inputs

@test("truncate('{text}', num_chars={num_chars}) returns '{expected}'")
def _(
    text=s,
    num_chars=each(20, 11, 10, 5),
    expected=each(s, s, "hello w...", "he..."),
):
    result = truncate(text, num_chars)
    assert result == expected

Cross platform: Tested on Mac OS, Linux, and Windows.

Zero config: Sensible defaults mean running ward with no arguments is enough to get started. Can be configured using pyproject.toml or the command line if required.

Colourful, human readable output: quickly pinpoint and fix issues with detailed output for failing tests.

This project is currently in beta.

Planned features:

Smart test execution order designed to surface failures faster (using various heuristics)
Multi-process mode to improve performance
Code coverage with --coverage flag
Handling flaky tests with test-specific retries, timeouts
Plugin system

Let me know if you'd like to help out with any of these features!