[ISSUE #1852]🧪Add test case for rebalance_strategy

[rust-learn-now]

Which Issue(s) This PR Fixes(Closes)

Fixes #1852

Brief Description

How Did You Test This Change?

Summary by CodeRabbit

• Tests
  • Introduced a new test module for validating the check function.
  • Added multiple unit tests to cover various input scenarios and edge cases for the check function.

[coderabbitai]

Walkthrough

This pull request adds a comprehensive test module for the check function in the rebalance_strategy.rs file. The test module includes five distinct unit tests that cover various scenarios such as valid inputs, empty input conditions, and edge cases like the current consumer ID not being present in the consumer ID list. These tests aim to validate the robustness and correctness of the check function's behavior under different input conditions.

Changes

File	Change Summary
rocketmq-client/src/consumer/rebalance_strategy.rs	Added a new #[cfg(test)] module with five test functions to validate the check function's behavior

Assessment against linked issues

Objective	Addressed	Explanation
Add unit tests for rebalance_strategy [#1852]	✅

Possibly related PRs

• [Issue #1292] Rocketmq-client supports the AllocateMessageQueueStrategy algorithm-AllocateMachineRoomNearby #1650: Modifies the same rebalance_strategy.rs file and involves the check function
• [Issue #1294] Rocketmq-client supports the AllocateMessageQueueStrategy algorithm-AllocateMessageQueueByConfig #1651: Also modifies rebalance_strategy.rs and maintains the check function logic

Suggested labels

ready to review, testing, approved, auto merge

Suggested reviewers

• TeslaRustor
• SpaceXCN
• mxsm

Poem

🐰 Hopping through code with glee,
Testing strategies, setting functions free!
Rebalance checks, now crystal clear,
Unit tests bring joy and cheer!
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[rocketmq-rust-bot]

🔊@rust-learn-now 🚀Thanks for your contribution 🎉. CodeRabbit(AI) will review your code first 🔥

[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (2)

rocketmq-client/src/consumer/rebalance_strategy.rs (2)

70-120: Existing test cases provide good coverage of basic scenarios.

The test cases effectively cover the main scenarios including valid inputs, empty parameters, and the case where current_cid is not in cid_all. Consider enhancing error case tests by verifying the specific error types:

 let result = check(&consumer_group, &current_cid, &mq_all, &cid_all);
-assert!(result.is_err());
+assert!(matches!(result, Err(IllegalArgumentError(_))));

---

121-121: Consider adding more edge case tests.

To improve test coverage, consider adding the following test cases:

1. Test with duplicate consumer IDs in cid_all
2. Test with large sets of message queues and consumer IDs to verify performance
3. Test with malformed message queue data

Example test case for duplicate consumer IDs:

#[test]
fn check_with_duplicate_cids() {
    let consumer_group = CheetahString::from("test_group");
    let current_cid = CheetahString::from("cid_1");
    let mq_all = vec![MessageQueue::from_parts("test_topic", "broker_a", 0)];
    let cid_all = vec![
        CheetahString::from("cid_1"),
        CheetahString::from("cid_1"), // Duplicate
        CheetahString::from("cid_2"),
    ];
    let result = check(&consumer_group, &current_cid, &mq_all, &cid_all);
    assert!(result.is_ok());
    assert!(result.unwrap());
}

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📥 Commits

Reviewing files that changed from the base of the PR and between d6a726e and 698076a.

📒 Files selected for processing (1)

• rocketmq-client/src/consumer/rebalance_strategy.rs (1 hunks)

🔇 Additional comments (1)

rocketmq-client/src/consumer/rebalance_strategy.rs (1)

63-68: LGTM! Test module setup follows best practices.

The test module is properly configured with the test attribute and includes all necessary imports.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.30%. Comparing base (d6a726e) to head (698076a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1853      +/-   ##
==========================================
+ Coverage   28.24%   28.30%   +0.05%     
==========================================
  Files         475      475              
  Lines       66386    66428      +42     
==========================================
+ Hits        18752    18801      +49     
+ Misses      47634    47627       -7     

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