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meeting-room/frontend/node_modules/eslint-plugin-jest/docs/rules/prefer-to-have-length.md
flying-hero 96f6318101 📦 添加虚拟环境和启动脚本
新增:
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- backend/start.sh - 启动脚本(使用虚拟环境)
- backend/requirements.txt - 依赖列表
- .gitignore - 忽略虚拟环境和缓存文件

说明:
- 每个项目使用独立虚拟环境
- 避免依赖冲突
- 启动脚本自动创建和激活虚拟环境
2026-04-04 18:29:02 +08:00

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Suggest using toHaveLength() (prefer-to-have-length)

In order to have a better failure message, toHaveLength() should be used upon asserting expectations on objects length property.

Rule details

This rule triggers a warning if toBe(), toEqual() or toStrictEqual() is used to assert objects length property.

expect(files.length).toBe(1);

This rule is enabled by default.

Default configuration

The following patterns are considered warnings:

expect(files.length).toBe(1);

expect(files.length).toEqual(1);

expect(files.length).toStrictEqual(1);

The following pattern is not warning:

expect(files).toHaveLength(1);