Test containers with Docker in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a Docker container for testing using pytest.

PyTest

from testcontainers.mysql import MySqlContainer

def test_mysql_container():
    with MySqlContainer("mysql:8.0") as [1]:
        assert container.is_running

Drag options to blanks, or click blank then click option'

Aservice

Bclient

Cdocker

Dcontainer

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name that does not represent the container instance.

Forgetting to assign the container to a variable.

The variable name 'container' is used to refer to the running MySQL container instance.

2fill in blank

medium

Complete the code to get the connection URL from the running MySQL container.

PyTest

from testcontainers.mysql import MySqlContainer

def test_connection_url():
    with MySqlContainer("mysql:8.0") as container:
        url = container.[1]()
        assert url.startswith("mysql://")

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Aconnection_url

Bget_connection_url

Cget_url

Dconnection_string

Attempts:

3 left

💡 Hint

Common Mistakes

Using an attribute instead of a method.

Using incorrect method names like 'connection_url' without parentheses.

The method 'get_connection_url()' returns the connection URL string for the MySQL container.

3fill in blank

hard

Fix the error in the code to properly start a PostgreSQL test container.

PyTest

from testcontainers.postgres import PostgresContainer

def test_postgres():
    container = PostgresContainer("postgres:13")
    container.[1]()
    assert container.is_running
    container.stop()

Drag options to blanks, or click blank then click option'

Astart

Blaunch

Crun

Dbegin

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'run()' or 'launch()' which are not valid methods.

Forgetting to call the method with parentheses.

The correct method to start the container is 'start()'. Other options are invalid and cause errors.

4fill in blank

hard

Fill both blanks to create a test that uses a Redis container and checks if it is running.

PyTest

from testcontainers.redis import RedisContainer

def test_redis_container():
    with RedisContainer() as [1]:
        assert [2].is_running

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Aredis_container

Bredis

Ccontainer

Dclient

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names in the 'with' statement and assertion.

Using generic names like 'client' that do not represent the container.

The variable 'redis_container' is used consistently to refer to the Redis container instance inside the 'with' block.

5fill in blank

hard

Fill all three blanks to create a test that starts a MongoDB container, gets its connection URL, and asserts it contains 'mongodb://'.

PyTest

from testcontainers.mongodb import MongoDbContainer

def test_mongodb_connection():
    with MongoDbContainer("mongo:5.0") as [1]:
        url = [2].[3]()
        assert "mongodb://" in url

Drag options to blanks, or click blank then click option'

Amongo_container

Bmongo

Cget_connection_url

Dconnection_url

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names for the container instance.

Using 'connection_url' as an attribute instead of a method.

Forgetting parentheses when calling the method.

The variable 'mongo_container' is used to hold the container instance. The method 'get_connection_url()' returns the connection URL string.