有没有相当于检查在swift语言中抛出异常单元测试？
例如我有一个类：
class Square : NSObject{
let sideLength: Int
init(sideLength: Int) {
assert(sideLength >= 0,"Wrong initialization of Square class with below zero side length")
self.sideLength = sideLength
super.init()
}
}
和测试检查它的工作.在目标C中,我可以这样写测试方法：
- (void)testinitializationWithWrongSideLengthThrowsExceptions{
XCTAssertThrows([[Shape alloc] initWithSideLength: -50],"Should throw exceptions on wrong side values initialisations");
}
什么是Swift等技术？
我认为assert() – 函数只能用于调试目的.不仅仅是因为苹果Swift-Book(
https://itun.es/de/jEUH0.l)的以下声明：
“断言导致您的应用程序终止,并不能代替设计您的代码,使得无效的条件不太可能出现.”
这就是为什么我会解决如下：
import Cocoa
import XCTest
class Square
{
let sideLength: Int
init(_ sideLength: Int)
{
self.sideLength = sideLength >= 0 ? sideLength : 0
}
}
class SquareTests: XCTestCase
{
override func setUp() { super.setUp() }
override func tearDown() { super.tearDown() }
func testMySquareSideLength() {
let square1 = Square(1);
XCTAssert(square1.sideLength == 1,"Sidelength should be 1")
let square2 = Square(-1);
XCTAssert(square2.sideLength >= 0,"Sidelength should be not negative")
}
}
let tester = SquareTests()
tester.testMySquareSideLength()