概述
提升测试质量：瞄准分支覆盖，隔离不稳定测试，并确认测试套件确定且快速，无随机失败。本工作流属于测试质量领域，目标是make the test suite deterministic with branch coverage above the target and zero flaky tests in the main path.以下步骤将指导你完成关键操作，并在每一步设置可验证的中间状态，确保最终结果可复现、可审计、可回滚。
步骤详解
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Measure coverage gaps。 Generate a coverage report and list the branches and error paths that are not exercised by any test.预期状态：A gap list exists ranked by risk for the next test additions.
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Quarantine flaky tests。 Identify tests that fail intermittently, quarantine them in a separate suite, and file an issue for each.预期状态：The main suite is green and flaky tests are tracked separately.
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Verify determinism。 Run the suite three times in a row on the same commit and confirm the results are identical.预期状态：Three consecutive runs produce the same pass or fail result.
每一步都包含明确的动作与预期状态。执行时请记录实际输出，与预期状态逐一对照。若某一步未达预期，应停下排查而非继续推进，避免问题向后传递放大。
验证与后续
验证方法：make the test suite deterministic with branch coverage above the target and zero flaky tests in the main path.完成后，将本次执行的命令、输出与参数归档，并更新团队运行手册。若用于生产环境，请先在预发环境完整演练一次，并确认团队熟悉回滚路径与应急联系人。本工作流难度级别为进阶（intermediate），预计耗时约30分钟。该流程已通过结构化校验，步骤与决策点均与英文版本严格一致，可在本地按工作流步骤复现并核对结果。
代码示例
npx vitest run --coverage --coverage.branches=80