Test Coverage Diff / 测试覆盖率差异分析

Compare coverage between branches, highlight uncovered lines in PR diff, and suggest test cases. / 对比分支间覆盖率，高亮 PR 差异中未覆盖代码行并建议测试用例。

Compare coverage between branches, highlight uncovered lines in PR diff, and suggest test cases. / 对比分支间覆盖率，高亮 PR 差异中未覆盖代码行并建议测试用例。

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Overview / 概览

• Instantly compare coverage between any two branches, exposing gaps before merge / 即刻对比任意分支覆盖率，在合并前精准暴露测试盲区，守护上线质量 • Highlight uncovered lines in your PR diff with color-coded inline annotations / 在 PR 差异中高亮未覆盖代码行，使用色彩标记内联注释，让问题一目了然 • Suggest targeted test cases based on uncovered diff logic / 基于未覆盖的差异逻辑智能推荐针对性测试用例，减少人工回溯成本 • Support multi-language coverage data (Java, Python, JavaScript, Go) / 支持多语言覆盖率数据（Java, Python, JavaScript, Go），团队统一使用零门槛 • (Pro) Inject test recommendations directly into your CI pipeline for automated review / （Pro）将测试建议直接注入 CI 流水线，自动化审查无需人工介入 • (Pro) Generate performance heatmaps of coverage trends over release cycles / （Pro）生成跨发布周期的覆盖率趋势热力图，为长期质量策略提供数据支撑

How It Works / 原理

bash

# Step 1 — check environment
which bash curl && echo "Ready"

# Step 2 — run the tool
git diff main feature/new-auth -- test/ | test-coverage-diff --before main This shows which lines in the new auth feature are untested compared to main branch. / 展示新认证功能相比主分支有哪些代码行未被测试覆盖。 

# Step 3 — review output
echo "Done — check the generated output"

Example Scenarios / 示例场景

• Rapid feature branch review: A developer has a 300-line diff in a hotfix branch. The tool pinpoints exactly which 12 lines lack coverage, saving hours of manual inspection. / 快速功能分支审查：开发者在热修复分支有 300 行差异。工具精准定位出 12 行未覆盖代码，节省数小时人工排查。 • CI gatekeeping: Before merging, a team's pipeline runs coverage diff analysis and blocks PRs that drop overall coverage by more than 2%. / CI 门禁管控：合并前团队流水线运行覆盖率差异分析，阻止整体覆盖率下降超过 2% 的 PR。 • Tech debt reduction: A legacy module has low coverage. Using diff comparison, the QA team prioritizes tests for newly added code instead of rewriting everything. / 技术债消减：旧模块覆盖率低。通过差异对比，QA 团队优先为新增代码编写测试，而非重写全部。

Plans / 版本

Capability	Free	Pro
Basics / 基础	✅	✅
Automation / 自动化	—	✅
AI / AI 功能	—	✅
Support	Community	Priority

• Pro unlocks automated CI annotations blocking PRs with risky uncovered code. • Pro 解锁自动 CI 注释，可拦截存在高风险未覆盖代码的 PR。 • Pro gives you per-sprint coverage trend reports for team performance tracking. • Pro 提供每个迭代的覆盖率趋势报告，助力团队质量绩效可视化。 • Pro enables one-click test case generation from diff context, not just a suggestion. • Pro 支持从差异上下文一键生成测试用例，而不仅仅是给出建议。\n\n

📦 Published by King AI — kingai.work