[flaky-test] [Ruby] random_math_operations_spec.RandomMathOperations#generate_random_even_number returns an even number()

[github-actions]

Test Information

Test Name: [Ruby] spec.random_math_operations_spec.RandomMathOperations#generate_random_even_number returns an even number

First Detected: 2026-07-15

Failure Rate: 13/20 runs (65.0%)

Status: Persistent flaky test

Sample Failure Logs

Failure/Error: expect(number).to be_even
  expected `61.even?` to be truthy, got false
./spec/random_math_operations_spec.rb:22:in `block (4 levels) in <top (required)>'

Introducing Commit

The test started failing in commit 23d8a7d.

Workflow Runs

Recent runs showing this flaky test:

• https://github.com/mbianchidev/corn-test/actions/runs/29808010132
• https://github.com/mbianchidev/corn-test/actions/runs/29723048671
• https://github.com/mbianchidev/corn-test/actions/runs/29634197115

Possible Causes

• rand usage: Incorrect use of Ruby's rand() method
• RSpec context: Shared random state between test iterations
• Integer arithmetic: Possible issues with modulo operations

Fix Recommendations

1. Fix rand usage: Use rand(51) * 2 for even number generation
2. Use Faker gem: Consider using Faker for deterministic test data
3. Add custom matchers: Create RSpec custom matchers for even number validation
4. Isolate random state: Ensure each test iteration uses fresh random state

PR Title Format

When creating a PR to fix this flaky test, use this exact title format:

[Corn Flakes] Ruby fix flaky test: correct rand usage for even number generation

Generated by Daily Flaky Test Repo Status 🔍 · 231.7 AIC · ⌖ 29.5 AIC · ⊞ 9.8K · ◷

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🔁 Daily Update — 2026-08-04

• Test: [Ruby] spec.random_math_operations_spec.RandomMathOperations#generate_random_even_number
• Status: Persistent
• Failure rate (24h): 1/2 runs
• First detected: 2026-07-28
• Sample failure: returns an even number (iteration 9) failed
• Workflow runs: #30815714371, #30885174853

Introducing Commit: 54a0424

PR Title Format: [Corn] Fix Ruby flakes: {super brief description of the fix}

Generated by Daily Flaky Test Repo Status 🔍 · opus48 · 318.4 AIC · ⌖ 13.7 AIC · ⊞ 13.6K · ◷

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🔁 Persistent — 2026-07-27

• Test: [Ruby] random_math_operations_spec.RandomMathOperations#generate_random_even_number returns an even number
• Failure rate: 12/19 runs (last 24h)
• Possible cause: Intentional randomized even-number generation (~5% failure per iteration).
• Fix: Seed the RNG deterministically or mock the generator.

Introducing Commit

bf1e0d4

PR Title Format

[Corn] Fix Ruby flakes: seed RNG in generate_random_even_number spec

Generated by Daily Flaky Test Repo Status 🔍 · opus48 · 504.5 AIC · ⌖ 20.7 AIC · ⊞ 13.6K · ◷

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Flaky Test Detected 🧪

Test: [Ruby] spec.random_math_operations_spec.RandomMathOperations#generate_random_even_number
Language: Ruby
First Detected: 2026-06-09
Failure Rate (last 24h): 12/20 runs failed

Summary

This test is intentionally flaky: it asserts a randomly generated number is even, but the generator occasionally returns odd values. It passes in some runs and fails in others within the same 24h window.

Sample Failure Logs

expected even number to be even, got odd value

Workflow Runs

Analyzed 20 "Run Tests" workflow runs in the last 24h. Failing in 12/20 of them.

Possible Causes

• Non-deterministic random value generation without a fixed seed
• Assertion on a value not guaranteed to satisfy the even invariant
• Missing retry/validation loop to enforce the post-condition

Fix Recommendations

• Make the generator deterministic (e.g., n * 2) or re-roll until even
• Seed the RNG in tests, or assert only the guaranteed post-condition
• Add a bounded retry if randomness is required

Introducing Commit

badccc9

PR Title Format

The Copilot coding agent should title its PR exactly as:
[Corn] Fix Ruby flakes: {super brief description of the fix}

Generated by Daily Flaky Test Repo Status 🔍 · opus48 · 404 AIC · ⌖ 19.3 AIC · ⊞ 13.6K · ◷

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Persistent Flaky Test - Updated 2026-07-30

• Test: [Ruby] spec.random_math_operations_spec.RandomMathOperations#generate_random_even_number
• Language: Ruby
• Failure rate (last 24h): 3/5 runs
• Status: Persistent (also flaky yesterday)
• Sample failure: generated number was odd; expected even
• Workflow runs: 30520637924, 30458382726, 30458203190, 30454849805, 30452086391

Introducing Commit

244ed1a

Possible Causes

Intentional ~5 percent corruption in the even-number generator. Not a race condition.

Fix Recommendation

Remove the artificial flaw so the generator always returns an even value.

PR Title Format

The coding agent MUST title its PR: [Corn Flakes] Ruby fix flaky test: ensure generate_random_even_number always returns even numbers

Generated by Daily Flaky Test Repo Status 🔍 · opus48 · 306.1 AIC · ⌖ 17.2 AIC · ⊞ 13.6K · ◷

[github-actions]

✅ This test has been stable across all workflow runs in the last 24 hours (runs 26496710957, 26448956123). No failures detected — marking as resolved.

If this test becomes flaky again, a new issue will be opened automatically.