PYTHON-5724 Add integration test exercising compression logic

[aclark4life]

PYTHON-5724

Changes in this PR

Adds an integration test that sends real commands with each available wire-protocol compressor enabled, exercising the end-to-end compress/decompress path in compression_support.py.

• Adds test_compression_commands in test/asynchronous/test_client.py.

Test Plan

For each available compressor, the test handshakes so the server negotiates it, then asserts the pooled connection received the correct compressor context type (skipped if the server did not negotiate it):

Compressor	Context class	compressor_id
snappy	SnappyContext	1
zlib	ZlibContext	2
zstd	ZstdContext	3

It then spies on compress() and round-trips an insert/find of compressible data, asserting both that compress() was invoked (send path) and that the decompressed response matches (receive path via decompress).

Checklist

Checklist for Author

• Did you update the changelog (if necessary)? N/A — test-only change.
• Is there test coverage? This PR is test coverage for compression_support.py.
• Is any followup work tracked in a JIRA ticket? If so, add link(s). N/A.

Checklist for Reviewer

• Does the title of the PR reference a JIRA Ticket?
• Do you fully understand the implementation? (Would you be comfortable explaining how this code works to someone else?)
• Is all relevant documentation (README or docstring) updated?

[Copilot]

Pull request overview

Adds new integration coverage to validate wire-protocol compression behavior by running real commands with each negotiated compressor, aiming to exercise the compress/decompress path used by the driver’s networking stack.

Changes:

• Import concrete compression context classes (Snappy/Zlib/Zstd) into the client test modules for type assertions.
• Add test_compression_commands (sync + async) to negotiate each available compressor, assert the negotiated context type, and spy on compress() during a CRUD round-trip.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
test/test_client.py	Adds a sync integration test that negotiates compressors and verifies compression is used during command execution.
test/asynchronous/test_client.py	Adds the async equivalent integration test for compressor negotiation and command execution.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.