Introduction
Welcome to the documentation for the MetovaTestKit framework! This framework aims to simplify and enhance your testing experience for iOS applications. Whether you are a beginner or an experienced developer, this documentation will provide you with the information you need to effectively use MetovaTestKit in your projects.
Getting Started
To get started with MetovaTestKit, follow the steps below:
Step 1: Installation
To install MetovaTestKit, you can use Cocoapods by adding the following line to your Podfile:
“`ruby
pod ‘MetovaTestKit’
“`
Then, run `pod install` command to install the framework dependencies.
Step 2: Importing
In the Swift file where you want to use MetovaTestKit, import the framework by adding the following line:
“`swift
import MetovaTestKit
“`
Step 3: Basic Usage
To start using MetovaTestKit, create an instance of `MTKTestCase` and use its methods and properties to write your test cases. For example:
“`swift
class ExampleTest: MTKTestCase {
func testExample() {
// Test code goes here
}
}
“`
Features
1. Test Doubles
MetovaTestKit provides various test double classes such as `Mock`, `Stub`, and `Spy` that allow you to easily create and manage test doubles for your unit tests. These test doubles can be used to replace real dependencies and provide controlled responses during testing.
2. Test Fixtures
With MetovaTestKit, you can define test fixtures to set up the initial state for your tests. Test fixtures can be used for generating mock data, configuring dependencies, or any other setup required before running your test cases.
3. Test Assertions
MetovaTestKit offers a range of assertion functions to validate expectations in your test cases. These assertions allow you to make specific assertions about method invocations, captured arguments, or any custom conditions within your tests.
Guidelines
1. Arrange, Act, Assert (AAA) principle
Following the Arrange, Act, and Assert principle helps in writing more maintainable and readable tests. Arrange sets up the preconditions for the test, Act performs the actual operation being tested, and Assert verifies the expected result.
2. Isolate dependencies
When writing unit tests, it is crucial to isolate dependencies by replacing them with test doubles. This ensures that test cases only focus on the behavior of the unit being tested and are not affected by the behavior of external dependencies.
3. Use meaningful test names
Give your test methods descriptive names that clearly communicate the intention and purpose of the test. This makes it easier to understand the purpose of the test cases and quickly identify the problematic behavior when a test fails.
Example
Here’s an example demonstrating the usage of MetovaTestKit in a test case:
1. ViewController.swift
“`swift
class ViewController: UIViewController {
var dataManager: DataManagerProtocol
init(dataManager: DataManagerProtocol) {
self.dataManager = dataManager
super.init(nibName: nil, bundle: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
fetchData()
}
private func fetchData() {
dataManager.fetchData { result in
// Handle result
}
}
}
“`
2. ViewControllerTests.swift
“`swift
class ViewControllerTests: MTKTestCase {
var viewController: ViewController!
var mockDataManager: MockDataManager!
override func setUp() {
super.setUp()
mockDataManager = MockDataManager()
viewController = ViewController(dataManager: mockDataManager)
}
func testFetchData() {
// Arrange
let mockResult = // create mock result
// Stub dataManager.fetchData method to return the mockResult
mockDataManager.stub(.fetchData) { completion in
completion(.success(mockResult))
}
// Assert
expectation { [unowned self] fulfill in
self.mockDataManager.assert(.fetchData)
fulfill()
}
// Act
viewController.viewDidLoad()
// Wait for the expectation to be fulfilled
waitForExpectations(timeout: 1, handler: nil)
}
}
“`
Conclusion
With MetovaTestKit, testing your iOS applications becomes much easier and efficient. By leveraging its features like test doubles and assertions, you can write comprehensive unit tests that ensure the reliability and correctness of your code. Happy testing!