Add interleaved priority sequence test case

[leynos]

Summary

• verify scheduler always drains high-priority frames first when fairness is disabled

Testing

• make fmt
• make lint
• make test

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https://chatgpt.com/codex/tasks/task_e_686c1cc3b7f8832292901b95e8851050

Summary by Sourcery

Tests:

• Add interleaved high/low priority sequence test case to verify high-priority frames are drained first when fairness is disabled.

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[coderabbitai]

Summary by CodeRabbit

• Tests
  • Added a new test case to verify correct processing order with an interleaved sequence of high and low priorities.

Summary by CodeRabbit

• Tests
  • Added a new test case with an interleaved priority order to further verify processing order when fairness is disabled.

Walkthrough

A new test case with an interleaved priority sequence was added to the parameterised test processes_all_priorities_in_order in tests/connection_actor.rs. This addition verifies that, when fairness is disabled (max_high_before_low = 0), all high-priority frames are processed before any low-priority frames, regardless of the input sequence.

Changes

File(s)	Change Summary
tests/connection_actor.rs	Added an interleaved priority order variant to the parameterised fairness-disabled test function.

Sequence Diagram(s)

sequenceDiagram
    participant TestRunner
    participant ConnectionActor

    TestRunner->>ConnectionActor: Submit frames with [High, Low, High, Low, High] priorities
    Note right of ConnectionActor: Fairness disabled (max_high_before_low = 0)
    ConnectionActor-->>TestRunner: Processes all High frames first
    ConnectionActor-->>TestRunner: Processes all Low frames after High
    TestRunner-->>TestRunner: Assert processing order is correct

Loading

Possibly related issues

• Add interleaved priority sequence test for scheduler fairness disabled behavior #190: Adds the interleaved priority sequence test case to the relevant parameterised test.
• Add boundary case tests for scheduler with homogeneous priority queues #191: Relates to adding boundary case tests for priority queues in the same test function.

Possibly related PRs

• Add test for strict priority when fairness disabled #189: This PR directly extends the parameterised test introduced in Add test for strict priority when fairness disabled #189.
• Add fairness disabled test #176: Builds on the same fairness-disabled test function in tests/connection_actor.rs.
• Add scheduler boundary tests #196: Further extends and generalises priority sequence tests for scheduler fairness.

Suggested reviewers

• codescene-delta-analysis

Poem

In the warren of code, a new test does hop,
Interleaved priorities—will fairness still stop?
Highs leap ahead, lows patiently wait,
No matter the order, the result is first-rate.
With every new variant, our coverage will grow—
A bunny’s delight in the test garden’s row! 🐇

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Reviewing files that changed from the base of the PR and between 2d27327 and f9e349b.

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• tests/connection_actor.rs (1 hunks)

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🔇 Additional comments (1)

tests/connection_actor.rs (1)

127-133: Excellent addition of interleaved priority test coverage.

This test case properly verifies that the scheduler consistently drains high-priority frames first when fairness is disabled, even with an interleaved input sequence. The implementation follows the established pattern and provides valuable coverage for this specific scenario.

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[sourcery-ai]

Hey @leynos - I've reviewed your changes and they look great!

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