Bug: file descriptor leak in HttpWaitStrategy

Start at src/testcontainers/core/wait_strategies.py around HttpWaitStrategy._handle_http_error, which the issue identifies as the leak location. Run the provided MRE with -Werror::ResourceWarning against the typesense/typesense image to reproduce it. Done means an HTTP error response is safely cleaned up and the MRE completes without the ResourceWarning.

Describe the bug

When using an HttpWaitStrategy in DockerContainer.waiting_for and the container image respond with an error code, the underlying HttpError is not correctly handled, leaking a file descriptor.

To Reproduce

Example with the https://hub.docker.com/r/typesense/typesense image, but should work with any image providing a HTTP server that takes a few seconds to start:

# mre.py
from testcontainers.core.container import DockerContainer
from testcontainers.core.wait_strategies import HttpWaitStrategy

print("starting")
with (
    DockerContainer("typesense/typesense:30.2", command="--data-dir /home --api-key=whatever --enable-cors")
    .with_exposed_ports(8108)
    .waiting_for(HttpWaitStrategy(8108, "/health").for_status_code(200))
):
    print("ok")

$ python -Werror::ResourceWarning mre.py
starting
Exception ignored while calling deallocator <function _TemporaryFileCloser.__del__ at 0x101984880>:
Traceback (most recent call last):
  File "/Users/loic/.local/share/uv/python/cpython-3.14.4-macos-aarch64-none/lib/python3.14/tempfile.py", line 484, in __del__
    _warnings.warn(self.warn_message, ResourceWarning)
ResourceWarning: Implicitly cleaning up <HTTPError 503: ''>
ok

Root Cause / fix

The issue is in https://github.com/testcontainers/testcontainers-python/blob/5c70d540e0df919e2de77ce8cc75b5c50cd772e7/src/testcontainers/core/wait_strategies.py#L428-L437

HttpError holds a reference to a (temporary) file storing the HTTP response, so it must be handled in a context manager to safely clean the file when the error is discarded.

Fixed MRE:

# mre.py
from contextlib import nullcontext
from typing import Union
from urllib.error import HTTPError, URLError

from testcontainers.core.container import DockerContainer
from testcontainers.core.wait_strategies import HttpWaitStrategy

class _FixedHttpWaitStrategy(HttpWaitStrategy):
    def _handle_http_error(self, error: Union[URLError, HTTPError]) -> bool:
        with error if isinstance(error, HTTPError) else nullcontext(error):
            return super()._handle_http_error(error)

print("starting")
with (
    DockerContainer("typesense/typesense:30.2", command="--data-dir /home --api-key=whatever --enable-cors")
    .with_exposed_ports(8108)
    .waiting_for(_FixedHttpWaitStrategy(8108, "/health").for_status_code(200))
):
    print("ok")

Runtime environment

• MacOS 26.6.2
• Python 3.14.4
• testcontainers 4.14.2

I can work on a PR if you'd like!