Bug: MSSQL (SqlServerContainer) ignores some parameters

Describe the bug

When running the SqlServerContainer, in this example with the image mcr.microsoft.com/mssql/server:2022-CU12-ubuntu-22.04, some parameters have no effect on the actual database and lead to failures. It seems like they are just not respected.

To Reproduce

import sqlalchemy
from testcontainers.mssql import SqlServerContainer

def test_showcase_bug():
    with SqlServerContainer(image="mcr.microsoft.com/mssql/server:2022-CU12-ubuntu-22.04", username="dummy") as mssql:
        engine = sqlalchemy.create_engine(mssql.get_connection_url()) # this includes the username "dummy" now.
        print(mssql.get_connection_url())
        with engine.begin() as connection:
            result = connection.execute(sqlalchemy.text("select @@VERSION"))

It loads a while. When looking at the database logs, it prints:

2024-11-14 10:39:43.81 Logon       Error: 18456, Severity: 14, State: 5.
2024-11-14 10:39:43.81 Logon       Login failed for user 'dummy'. Reason: Could not find a login matching the name provided. [CLIENT: 172.17.0.3]

Same thing for other parameters, for example db_name.

Runtime environment

Provide a summary of your runtime environment. Which operating system, python version, and docker version are you using? What is the version of testcontainers-python you are using? You can run the following commands to get the relevant information.

Windows 11
Python 3.11.9
testcontainers 4.8.2
sqlalchemy 2.0.36
pymssql 2.3.1

Thanks for your work!

从 SqlServerContainer 的实现开始，使用指定的 MSSQL 镜像以及 username 和 db_name 参数复现该示例。跟踪这些参数如何传递给容器和连接 URL，然后验证正在运行的数据库应用了这些参数，并且该示例不再因身份验证而失败。