test: use Client in test_client_server_integration.py

[ishymko]

To make tests a bit higher level and closer to how it's used externally.

[gemini-code-assist]

Summary of Changes

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This pull request significantly refactors the integration test suite to leverage the Client abstraction, moving away from direct Transport object manipulation. This change aims to elevate the testing level, making tests more representative of how the client library is intended to be used by external consumers. By interacting with the public Client interface, the tests become clearer, more maintainable, and provide a higher-fidelity validation of the system's behavior.

Highlights

• Refactored Integration Tests: The integration tests were updated to use the higher-level Client class instead of directly interacting with Transport objects, making tests more aligned with external usage.
• Updated Test Setups: The jsonrpc_setup, rest_setup, and grpc_setup fixtures were modified to instantiate Client objects via ClientFactory, streamlining client creation.
• Renamed Test Functions: Numerous test functions were renamed from test_transport_* to test_client_* to accurately reflect that they are now testing the Client interface.
• Enhanced gRPC Setup: The gRPC setup now dynamically updates the agent card's gRPC interface URL, improving flexibility in test environments.

Changelog

• tests/integration/test_client_server_integration.py
  • Updated imports to include Client and ClientFactory and removed direct Transport related imports.
  • Modified the agent_card fixture to include a JSON-RPC interface for broader test coverage.
  • Refactored the TransportSetup NamedTuple to encapsulate a Client instance instead of a ClientTransport.
  • Updated jsonrpc_setup, rest_setup, and grpc_setup fixtures to construct Client instances using ClientFactory.
  • Renamed all test_transport_* functions to test_client_* to reflect the new client-centric testing approach.
  • Adjusted test logic, method calls, and resource closing to align with the Client object's interface.
  • Removed the test_transport_get_card test, as its functionality is now implicitly covered by the Client.
  • Modified malformed payload tests to access the underlying transport through the Client object for consistency.

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[gemini-code-assist]

Code Review

This pull request refactors the client-server integration tests to use the higher-level Client interface instead of directly interacting with transports. This is a great improvement as it makes the tests more representative of the SDK's public API. The changes are well-implemented and consistent across the test suite. I have one minor suggestion to improve code clarity in the tests.

I am having trouble creating individual review comments. Click here to see my feedback.

tests/integration/test_client_server_integration.py (594-595)

The client object, being an instance of BaseClient, is guaranteed to have a close method as it's defined in the Client ABC. Therefore, the hasattr check is redundant and can be removed for cleaner code.

This also applies to similar checks in:

• test_client_get_signed_extended_card (line 725)
• test_client_get_signed_base_and_extended_cards (line 808)

    await client.close()