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Pyppettheater

Using puppeteer, docker, and python-gherkin-parser, you can easilly write functionnal tests using gherkin syntax.

Use as binary script

Install it:

$ pip3 install Pyppetheater

And use it:

$ pyppet_theater "/path/to/my-yml-or-feature-file"

Use with docker-compose

Just add a service using this image in your docker-compose.yml:

tests:
    image: gpenverne/pyppettheater:latest
    volumes:
        - ./tests/scenarios:/scenarios
    working_dir: /
    links:
      - "other-container-name:my-site.com"
      - "another-container-name:a-sub-domain-website"
    stdin_open: true
    tty: true

Adjust the volumes section as your need, to put your scenario folder in the docker container (in my case, all my scenarios are in a /tests/scenarios folder)

To run your tests suites, just run

docker-compose run tests pyppet_theater /scenarios/my-suite.yml
docker-compose run tests pyppet_theater /scenarios/my-features/my-scenario.feature

Writing scenarios

Sample folders tree:

| tests
	| scenarios
		my-suite.yml
		| my-features
			my-feature.feature
			my-other-feature.feature

my-suite.yml contains a simple "scenarios" sortered array with all your features:

scenarios:
    0: my-features/my-feature.feature
    2: my-features/my-other-feature.feature

Each .feature is a gherkin file which contains scenarios about your feature:

Feature: Create an account on a game

	Scenario: As a visitor, I register on the game
		Given I go on "http://my-website.com/"
		And I click on "\#signup-link"
		And I type "player6" in field "\#id_username"
		And I type "somepassword" in field "\#id_password1"
		And I type "somepassword" in field "\#id_password2"
		When I click on "\#content-section form button"
		Then I should be on "http://my-website.com/welcome"

	Scenario: As a new player, my elements has been setted with default values
		Given I go on "http://my-website.com/"
		And I click on "\#module-1"
		Then the element "\#quantity-for-1" should have "2000" as content
		And the element "\#quantity-for-2" should have "1000" as content
		And the element "\#quantity-for-3" should have "1000" as content

About actors

An actor is a python class which handle sentences. By default the Dom actor is loaded which can handle these sentences:

DOM - navigation

  • I go on "http://myurl"
  • Take a screenshot
  • I should be on "http://myurl"
  • I type "something" in field "#query"
  • I click on "#item"
  • The element "#element" should have "some content" as content
  • The element "#element" should not exists
  • The element "#element" should exists

MySQL

Configuration

parameters:
    mysql:
        db_host: db
        db_user: root
        db_password: root
        db_name: test

scenarios:
    0: "mysql/mysql-suite.feature"

Usage

  • The row with ":key" equal to ":value" in table ":table:" should exist
  • The row with ":key" equal to ":value" in table ":table:" should not exist
  • The row with ":key" equal to ":value" in table ":table:" has ":other_key" equal to ":new_value"
  • The row with ":key" equal to ":value" in table ":table:" does not exist
  • Then the row with ":key" equal to ":value" in table ":table:" should have ":other_key" equal to ":new_value"

Rest API

Configuration

parameters:
    rest:
        base_endpoint: https://my-api-endpoint.com

scenarios:
    0: rest/rest-suite.feature

Usage

  • I add these headers
  • I prepare a "GET|POST" request to "url" with data
  • I prepare a "GET" request to "url"
  • I send the request
  • Print the last response
  • Print the last json response
  • The json node "aaaa" should exist
  • The json node "aaaa" should not exist
  • The json node "id" should be equal to "1"
  • Then the JSON node "" should have "500" elements
  • Then the response status code should be "200"
  • Then the response content-type should be "application/json; charset=utf-8"
  • And the json nodes should be equal to:

If you need or want other sentences, open an issue or create a custom actor :)

To load custom actors, you can add a "Actors" section in your yml file, with all relatives paths (relative to the yaml file) to your actors classes:

actors:
    - "../actors/custom_actor.py"

Known limitations

  • Each feature is session independant: if you are logged in one .feature, you will not be logged in another one
  • Because of gherkin comments, you have to escape # selectors with a \

Sample scenarios and yml files

(Tests on this repo)[https://github.com/gpenverne/pyppettheater/tree/master/tests/]

Contexts & faker

Using (faker)[https://faker.readthedocs.io/en/latest/providers/faker.providers.automotive.html], you can generate (and set) fake generated values in your tests. For example:

	Scenario: We can send POST data using fake generated values
 		Given I prepare a "POST" request to "/posts" with data:
			| title  | <title:faker.name> |
			| body   | bar			      |
			| userId | 1			      |
		When I send the request
		Then the JSON node "title" should be equal to "<context.title>"

In this exemple, we send data, with a random generated name as title. The syntax <var_name:faker.method> means you can retrieve the value using the context: <context.title>