XCTUnwrap

💈範例

Unwrap the value, or throw an error.

//                  ╭──⭐️──╮
func testUserToken() throws {
    let user = User()
    // if succeeds: get the value, if fails: throw an exception.
    let token = try XCTUnwrap(user.getToken())    // ⭐️ can throw
    XCTAssertEqual(token.count, 40)
}

🔸 定義

func XCTUnwrap<T>(
    _ expression: @autoclosure () throws -> T?, 
    _    message: @autoclosure () -> String     = "", 
            file: StaticString                  = #filePath, 
            line: UInt                          = #line
) throws -> T

📗 參考

• HwS ⟩ How to check and unwrap optionals in tests using XCTUnwrap()

📘 手冊

• XCTest ⟩ Nil and Non-Nil Assertions ⟩

  • XCTUnwrap(_:_:file:line:)

  • XCTAssertNotNil(::file:line:)