青色中的功能测试

你好！

我叫Timofey，我是Cyan Platform团队的Python开发人员。我们的团队为产品开发人员开发工具。这些是库：HTTP客户端，Web服务器，数据库访问库以及用于微服务和整个站点的监视工具，以及与CI / CD的集成等等。

, — .

...

, , . , , , , , .

, - -. . , - . , , .

Code-coverage

. diff-coverage: pull-request , . — 80%, , pull-request diff-coverage . .

, , , . , , - : diff, :

API-, : dev, beta prod, .

-

coverage — -. ?

-, :

. , , , .

. 2 3 — . , , . , - “” .

- . -, . : — !

, . .

API . API Application Programming Interface, , HTTP API, RabbitMQ / Kafka .

, , HTTP Mock Server, , .

:

• , API, RabbitMQ, .
• , .
• , black box, , .
• , -.

, Python, C#, frontend NodeJS . Python pytest. Python- -, C#- API-. pytest , .

-?

! , :

• , -. .
• . - , — .
• , -, CI-pipeline .
• , , , , , .

, .

, API , — -.

, . , app.toml. , :

[[dependency]]
type = "postgres"
alias = "users"

[[dependency]]
type = "rabbitmq"

command line :

cian-functional-test-utils deps up

, docker-compose.yml docker-compose up -d. “” docker-compose, Elasticsearch, . , alias .

conftest.py :

@pytest.fixture(scope='session', autouse=True)
async def start(runner, pg):
    #           ,
    #          health-check.
    await runner.start_background_python_web()
    #       HTTP API,   RabbitMQ , 
    await runner.start_background_python_command('save-users-consumer')

@pytest.fixture(scope='session')
async def pg(postgres_service):
    db = await postgres_service.create_database_by_alias('users')
    #  `pathlib.Path`  .
    await db.execute_scripts(Path('database_schemas') / 'postgres.sql')
    return db

! :

async def test_v1_get_user(http, pg):  #   pg  conftest.py
    # arrange
    await pg.execute('INSERT INTO users (id, name) VALUES (1, "Bart")')
    # act
    response = await http.request('GET', '/v1/get-user/', params={'id': 1})
    # assert
    assert response.status == 200
    assert response.data == {'id': 1, 'name': 'Bart'}

PostgreSQL MsSQL, Cassandra, Redis, Elasticsearch.

HTTP API , :

async def test_save_users_consumer(pg, queue_service):
    # arrange
    #      RabbitMQ ,
    #  ,    .
    await queue_service.wait_consumer(queue='save-users')
    # act
    await queue_service.publish(
        exchange='users',
        routing_key='user.created',
        payload={'id':1, 'name': 'Bart'},
    )
    await asyncio.sleep(0.5)  #  ,    
    # assert
    row = await pg.fetchrow('SELECT name FROM users WHERE id = 1')
    assert row['name'] == 'Bart'

RabbitMQ ( ), . ? RabbitMQ .

, , , .

, . . - API . “” : , HTTP-, Management API. , API, . , .

HTTP-. .

HTTP

HTTP- mountebank. ( ) HTTP. , , :

@pytest.fixture(scope='session')
async def users_mock(http_mock_service):
    #     ,    ,
    #    URL    .
    return await http_mock_service.make_microservice_mock('users')

def test_something(users_mock):
    # arrange
    stub = await users_mock.add_stub(
        method='GET',
        path='/v1/get-user/',
        response=MockResponse(body={'firstName': 'Bart', 'lastName': 'Simpson'}),
    )
    # act
    # do something
    # assert
    # ,        ?userId=234
    request = (await stub.get_requests())[0]
    assert request.params['userId'] == '234'

stub, 404. mountebank . , , 404 , 404, , . , ( 404). , .

mountebank , . . :

• recordRequests — , , ;
• --debug — .

, session , HTTP-. start, , autouse=True. - , http-, .

, :

• , ;
• statsd graphite ;
• RabbitMQ , .

, , , , .

, .

, Sphinx. reStructuredText , , , .

:

• , ;
• , C#-;
• ;
• API Reference, .

, , , .

Type annotations

Python – . , , — . PEP 484.

pytest PyCharm, IDE , :

pytest IDE Jetbrains Python Community Edition. C#- Rider — , IDE, .

, . , Open Source.

, , , :

• ;
• ;
• ;
• , , -.

- , , , , .

, , , .

.