InjectStory

Swift 的简单依赖注入框架

用法

创建一个协议

protocol AnimalSound {
    func makeSound() -> String
}

为协议添加实现

class CatViewModel: AnimalSound {
    func makeSound() -> String{
        return "meow"
    }
}

在您想使用依赖注入的类中添加静态变量。请记住将协议类型用作 Injection 类型。

static let viewModelInjection = Injection<AnimalSound>(CatViewModel())

注入依赖项

let viewModel = viewModelInjection.inject()

如果您想使用不同的视图模型对象，请使用以下内容

ViewController.viewModelInjection.overrideOnce = { MockAnimalSound() }

（其中 MockAnimalSound 必须实现 AnimalSound 协议）

安装

使用 CocoaPods。

将其添加到 Podfile 中

pod 'InjectStory'

然后调用

pod install

和导入

import InjectStory

示例

//  ViewController.swift
import UIKit
import InjectStory

class ViewController: UIViewController {
    
    static let viewModelInjection = Injection<AnimalSound>(CatViewModel())
    let viewModel = viewModelInjection.inject()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        soundLabel.text = viewModel.makeSound()
    }

    @IBOutlet weak var soundLabel: UILabel!
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
}

// CatViewModel.swift
import Foundation

protocol AnimalSound {
    func makeSound() -> String
}

class CatViewModel: AnimalSound {
    func makeSound() -> String{
        return "meow"
    }
}

//  ViewControllerTests.swift

import XCTest
@testable import YourApp

class ViewControllerTests: XCTestCase {
    func testIfViewControllerCallsMeowMethod() {
        //given
        let spy = AnimalSoundSpy()
        //override value returned by viewModelInjection
        ViewController.viewModelInjection.overrideOnce = { spy }
        //create system under test
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let sut = storyboard.instantiateViewController(withIdentifier: "viewController") as! ViewController

        //when
        _ = sut.view //to call viewDidLoad
        
        //then
        XCTAssertTrue(spy.makeSoundCalled)
    }
}

//mock class
class AnimalSoundSpy: AnimalSound {
    var makeSoundCalled = false
    func makeSound() -> String{
        makeSoundCalled = true
        return ""
    }
}

InjectStory 0.5

InjectStory 0.5

InjectStory 0.5

InjectStory

用法

安装

示例