[英]How to unit-test this custom UITextField in Swift?
我已经创建了这样的自定义UITextField
import Foundation
import UIKit
class NoZeroTextField: UITextField, UITextFieldDelegate {
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.delegate = self
}
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
if (string == "0" ) {
//ignore input
return false
}
return true
}
}
我正在尝试为该类编写单元测试,但是问题在于将NSCoder实例传递给构造函数。 我无法实例化它或将其设置为nil。 我如何对该课程进行单元测试?
我想通了。 被测课程:
import Foundation
import UIKit
public class CustomTextField: UITextField, UITextFieldDelegate{
required public init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.delegate = self
}
public func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
if (string == "X" ){
//ignore input
return false
}
return true
}
}
测试本身:
import UIKit
import XCTest
import TryCustom
import Foundation
class CustomTextFieldTests: XCTestCase {
func testCustomTextField() {
//pass in dummy non abstract NSCoder (NSKeyedUnarchiver)
let cd = NSKeyedUnarchiver(forReadingWithData: NSMutableData())
let c = CustomTextField(coder:cd)
let result = c!.textField(c!, shouldChangeCharactersInRange: NSRange(), replacementString: "X")
XCTAssertFalse(result)
}
}
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