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Pytest Plugin for BDD

Project description

Eucalyptus - BDD plugin for Pytest

A nice fork of Aloe. Migrated from Nose to Pytest.

pypi pypi-versions builds docs coverage

pytest-eucalyptus has been built to feature the best of both worlds:

  • Aloe which implements great infrastructure and uses the original Gherkin parser.
  • pytest-bdd does not require a separate runner and benefits from the power and flexibility of Pytest.

Quick Start

  1. Create new module and add empty __init__.py.

  2. Install Pytest and Eucalyptus:

    pip install pytest pytest-eucalyptus
    
  3. Let's assume we are testing the following implementation of calculator.py:

        def add(*numbers):
            return sum(numbers)
    
  4. Write your first feature tests/calculator.feature:

        Feature: Add up numbers
    
        As a mathematically challenged user
        I want to add numbers
        So that I know the total
    
        Scenario: Add two numbers
            Given I have entered 50 into the calculator
            And I have entered 30 into the calculator
            When I press add
            Then the result should be 80 on the screen
    
  5. Add the definitions in tests/conftest.py:

        from calculator import add
        from pytest_eucalyptus import before, step, world
    
    
        @before.each_example
        def clear(*args):
            """Reset the calculator state before each scenario."""
            world.numbers = []
            world.result = 0
    
    
        @step(r'I have entered (\d+) into the calculator')
        def enter_number(self, number):
            world.numbers.append(float(number))
    
    
        @step(r'I press add')
        def press_add(self):
            world.result = add(*world.numbers)
    
    
        @step(r'The result should be (\d+) on the screen')
        def assert_result(self, result):
            assert world.result == float(result)
    
  6. Run the code

    $ pytest
============================= test session starts ==============================
platform darwin -- Python 3.7.3, pytest-4.6.3, py-1.8.0, pluggy-0.12.0
rootdir: /Users/eucalyptus-user/src/test
plugins: eucalyptus-0.3.0
collected 1 item                                                               

calculator.feature .                                                     [100%]

=========================== 1 passed in 0.01 seconds ===========================

Documentation

Please find more docs here.

License

Pytest-Eucalyptus is licensed under the Apache License 2.0 – see the LICENSE.md for specific details.

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