Cursor rule

1---
2description: "Swift testing extending common rules"
3globs: ["**/*.swift", "**/Package.swift"]
4alwaysApply: false
5---
6# Swift Testing
7 
8> This file extends the common testing rule with Swift specific content.
9 
10## Framework
11 
12Use **Swift Testing** (`import Testing`) for new tests. Use `@Test` and `#expect`:
13 
14```swift
15@Test("User creation validates email")
16func userCreationValidatesEmail() throws {
17    #expect(throws: ValidationError.invalidEmail) {
18        try User(email: "not-an-email")
19    }
20}
21```
22 
23## Test Isolation
24 
25Each test gets a fresh instance -- set up in `init`, tear down in `deinit`. No shared mutable state between tests.
26 
27## Parameterized Tests
28 
29```swift
30@Test("Validates formats", arguments: ["json", "xml", "csv"])
31func validatesFormat(format: String) throws {
32    let parser = try Parser(format: format)
33    #expect(parser.isValid)
34}
35```
36 
37## Coverage
38 
39```bash
40swift test --enable-code-coverage
41```
42 
43## Reference
44 
45See skill: `swift-protocol-di-testing` for protocol-based dependency injection and mock patterns with Swift Testing.
46