everything-claude-code / rules

---
description: "Swift testing extending common rules"
globs: ["**/*.swift", "**/Package.swift"]
alwaysApply: false
---
# Swift Testing

> This file extends the common testing rule with Swift specific content.

## Framework

Use **Swift Testing** (`import Testing`) for new tests. Use `@Test` and `#expect`:

```swift
@Test("User creation validates email")
func userCreationValidatesEmail() throws {
    #expect(throws: ValidationError.invalidEmail) {
        try User(email: "not-an-email")
    }
}
```

## Test Isolation

Each test gets a fresh instance -- set up in `init`, tear down in `deinit`. No shared mutable state between tests.

## Parameterized Tests

```swift
@Test("Validates formats", arguments: ["json", "xml", "csv"])
func validatesFormat(format: String) throws {
    let parser = try Parser(format: format)
    #expect(parser.isValid)
}
```

## Coverage

```bash
swift test --enable-code-coverage
```

## Reference

See skill: `swift-protocol-di-testing` for protocol-based dependency injection and mock patterns with Swift Testing.

More agent context in tpavanipradeep/everything-claude-code

81 other files this repository gives its agents, the first 60 shown.

Also found in 19 other repositories

The same file, byte for byte, in the weekly crawl of public GitHub; the 10 with the most stars.

• affaan-m/ECC246k
• loulanyue/awesome-claude-notes272
• mturac/everything-openai-codex89
• mit-network/everything-claude-code76
• Fmarzochi/EGC52
• ysyecust/everything-claude-code44
• j7-dev/everything-github-copilot19
• Infopibe/everything-claude-code8
• yapota2018/affaan-m-everything-claude-code4
• ArogyaReddy/https-github.com-affaan-m-everything-claude-code12