AssertThrow

Assert.swift

func AssertNoThrow<T>(_ expression: @autoclosure () throws -> T, file: StaticString = #file, line: UInt = #line) rethrows -> T {
    do {
        return try expression()
    } catch {
        XCTFail("\(error)", file: file, line: line)
        throw error
    }
}

func returnSomethingOrThrow() throws -> Int { ... }

class Test: XCTestCase {
  
  func testThrowingMethod() throws {
    let result = try AssertNoThrow(returnSomethingOrThrow())
    ...
  }
  
}