tests(Spanner): More MUX explicit tests

[amanda-tarafa]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @amanda-tarafa, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly expands the test suite for the Spanner client library's session and transaction management components. It introduces new tests to validate the lifecycle of managed sessions, ensuring correct handling of session freshness, expiry, and concurrent access. Additionally, it adds detailed tests for managed transactions, covering different transaction types and their disposal behavior. These additions enhance the reliability and maintainability of the Spanner client by providing more explicit and thorough validation of its core session and transaction mechanisms.

Highlights

• Enhanced ManagedSession Test Coverage: Expanded the test suite for ManagedSession to include scenarios for initial session creation, handling of soft and hard expiry, concurrent session refresh attempts, and the graceful swallowing or propagation of refresh failures.
• Comprehensive ManagedTransaction Tests: Introduced new tests for ManagedTransaction to validate behavior across different transaction options (no options, single-use, explicit, and inlined transactions), including fallback mechanisms and correct disposal logic for various transaction states (read-only, partitioned DML, committed, rolled-back, and uncommitted read-write).
• Improved Test Utility for SpannerClient: Modified SpannerClientHelpers.CreateMockClient to accept an optional FakeClock, providing more precise control over time-sensitive operations within tests and enhancing test predictability.
• Robust CancellationToken Access: Updated ManagedSession.BatchWriteAsync to use a null-conditional operator when accessing CancellationToken from callSettings, preventing potential NullReferenceException.

Changelog

• apis/Google.Cloud.Spanner.Data/Google.Cloud.Spanner.Data.Tests/V1/ManagedSessionOptionsTests.cs
  • Renamed file from apis/Google.Cloud.Spanner.V1/Google.Cloud.Spanner.V1.Tests/ManagedSessionOptionsTests.cs.
  • Updated using directives to include Google.Cloud.Spanner.V1 and Google.Cloud.Spanner.V1.Internal.Logging.
  • Modified _mockClient initialization to use SpannerClientHelpers.CreateMockClient.
• apis/Google.Cloud.Spanner.Data/Google.Cloud.Spanner.Data.Tests/V1/ManagedSessionTests.cs
  • Added new test cases for ManagedSession covering initial creation, no expiry, soft expiry with background refresh, concurrent calls, soft expiry refresh failure, hard expiry with blocking refresh, hard expiry refresh propagation, concurrent BeginTransactionAsync calls, and BatchWriteAsync session handling.
• apis/Google.Cloud.Spanner.Data/Google.Cloud.Spanner.Data.Tests/V1/ManagedTransactionTests.cs
  • Added new test cases for ManagedTransaction covering no transaction options, single-use transaction options, explicit transactions, inlined transactions, inlined transaction fallback to explicit, DisposeAsync invalidating further RPCs, and DisposeAsync behavior for read-only, partitioned DML, committed, rolled-back, and uncommitted read-write transactions.
• apis/Google.Cloud.Spanner.Data/Google.Cloud.Spanner.Data.Tests/V1/SpannerClientHelpers.cs
  • Added Google.Api.Gax using directive.
  • Modified CreateMockClient method signature to accept an optional FakeClock parameter.
  • Updated CreateMockClient implementation to use the provided FakeClock or create a new one.
• apis/Google.Cloud.Spanner.V1/Google.Cloud.Spanner.V1/ManagedSession.cs
  • Updated BatchWriteAsync to use a null-conditional operator when accessing callSettings.CancellationToken.

Activity

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[gemini-code-assist]

Code Review

This pull request introduces valuable new tests for ManagedSession and ManagedTransaction, significantly improving test coverage for multiplexed session handling. The refactoring of test file locations and the mock client helper are also positive changes. My review has identified a couple of minor issues in the new test code: one regarding the use of Task.Delay which could lead to test flakiness, and another concerning a redundant and incorrect mock setup. Addressing these points will enhance the robustness and clarity of the new tests.

[amanda-tarafa]

/gemini review

[gemini-code-assist]

Code Review

This pull request adds a comprehensive set of tests for ManagedSession and ManagedTransaction, which is a great addition for ensuring the stability of the multiplexed sessions feature. The tests cover various scenarios including session lifecycle, expiry, and transaction management. I've found a few areas for improvement related to namespace consistency and the use of Task.Delay in tests which could lead to flakiness. Please see my detailed comments. Overall, this is a valuable contribution.