…ll before?) (testcontainers#461)

we were using this code to test if it was online or
not:`MongoClient(self.get_connection_url())`, but that doesn't actually
perform any connection, instead you have to do something like:

```python
    @wait_container_is_ready()
    def _connect(self):
        client = self.get_connection_client()
        # will raise pymongo.errors.ServerSelectionTimeoutError if no connection is established
        client.admin.command('ismaster')
```

thanks to @smparekh for pointing this out, in his PR:


https://github.com/testcontainers/testcontainers-python/pull/80/files#diff-cf09f76f44db0af04c58ddb456ccae39f7e29ce1d9208acd5f514c0a7dccb646R78

this PR implements the workaround described in the PR:

```python
@pytest.fixture(scope="session")
def test_client():
    # init mongo
    mongo_container = MongoDbContainer("mongo:4").start()
    wait_for_logs(mongo_container, 'waiting for connections on port 27017')
    ...

Co-authored-by: Shaishav Parekh <sparekh@oneweb.net>

🤖 I have created a release *beep* *boop*
---


##
[4.0.1](testcontainers-v4.0.0...testcontainers-v4.0.1)
(2024-03-11)


### Features

* **postgres:** Remove SqlAlchemy dependency from postgres container
([#445](#445))
([f30eb1d](f30eb1d))


### Bug Fixes

* **clickhouse:** clickhouse waiting
([#428](#428))
([902a5a3](902a5a3))
* Close docker client when stopping the docker container
([#380](#380))
([efb1683](efb1683))
* failing tests for elasticsearch on machines with ARM CPU
([#454](#454))
([701b23a](701b23a))
* **mongodb:** waiting for container to start (it was not waiting at all
before?)
([#461](#461))
([2c4f171](2c4f171))
* unclosed socket warning in db containers
([#378](#378))
([cd90aa7](cd90aa7))
* Update the copyright header for readthedocs
([#341](#341))
([5bef18a](5bef18a))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: David Ankin <daveankin@gmail.com>

🤖 I have created a release *beep* *boop*
---


##
[4.0.1](testcontainers-v4.0.0...testcontainers-v4.0.1)
(2024-03-11)


### Features

* **postgres:** Remove SqlAlchemy dependency from postgres container
([#445](#445))
([f30eb1d](f30eb1d))


### Bug Fixes

* **clickhouse:** clickhouse waiting
([#428](#428))
([902a5a3](902a5a3))
* Close docker client when stopping the docker container
([#380](#380))
([efb1683](efb1683))
* failing tests for elasticsearch on machines with ARM CPU
([#454](#454))
([701b23a](701b23a))
* go back to 4.0.1
([#465](#465))
([1ac8c24](1ac8c24))
* **mongodb:** waiting for container to start (it was not waiting at all
before?)
([#461](#461))
([2c4f171](2c4f171))
* unclosed socket warning in db containers
([#378](#378))
([cd90aa7](cd90aa7))
* Update the copyright header for readthedocs
([#341](#341))
([5bef18a](5bef18a))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: David Ankin <daveankin@gmail.com>

🤖 I have created a release *beep* *boop*
---


##
[4.0.1](testcontainers/testcontainers-python@testcontainers-v4.0.0...testcontainers-v4.0.1)
(2024-03-11)


### Features

* **postgres:** Remove SqlAlchemy dependency from postgres container
([testcontainers#445](testcontainers#445))
([f30eb1d](testcontainers@f30eb1d))


### Bug Fixes

* **clickhouse:** clickhouse waiting
([testcontainers#428](testcontainers#428))
([902a5a3](testcontainers@902a5a3))
* Close docker client when stopping the docker container
([testcontainers#380](testcontainers#380))
([efb1683](testcontainers@efb1683))
* failing tests for elasticsearch on machines with ARM CPU
([testcontainers#454](testcontainers#454))
([701b23a](testcontainers@701b23a))
* **mongodb:** waiting for container to start (it was not waiting at all
before?)
([testcontainers#461](testcontainers#461))
([2c4f171](testcontainers@2c4f171))
* unclosed socket warning in db containers
([testcontainers#378](testcontainers#378))
([cd90aa7](testcontainers@cd90aa7))
* Update the copyright header for readthedocs
([testcontainers#341](testcontainers#341))
([5bef18a](testcontainers@5bef18a))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: David Ankin <daveankin@gmail.com>

🤖 I have created a release *beep* *boop*
---


##
[4.0.1](testcontainers/testcontainers-python@testcontainers-v4.0.0...testcontainers-v4.0.1)
(2024-03-11)


### Features

* **postgres:** Remove SqlAlchemy dependency from postgres container
([testcontainers#445](testcontainers#445))
([f30eb1d](testcontainers@f30eb1d))


### Bug Fixes

* **clickhouse:** clickhouse waiting
([testcontainers#428](testcontainers#428))
([902a5a3](testcontainers@902a5a3))
* Close docker client when stopping the docker container
([testcontainers#380](testcontainers#380))
([efb1683](testcontainers@efb1683))
* failing tests for elasticsearch on machines with ARM CPU
([testcontainers#454](testcontainers#454))
([701b23a](testcontainers@701b23a))
* go back to 4.0.1
([testcontainers#465](testcontainers#465))
([1ac8c24](testcontainers@1ac8c24))
* **mongodb:** waiting for container to start (it was not waiting at all
before?)
([testcontainers#461](testcontainers#461))
([2c4f171](testcontainers@2c4f171))
* unclosed socket warning in db containers
([testcontainers#378](testcontainers#378))
([cd90aa7](testcontainers@cd90aa7))
* Update the copyright header for readthedocs
([testcontainers#341](testcontainers#341))
([5bef18a](testcontainers@5bef18a))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: David Ankin <daveankin@gmail.com>