Javier Cicchelli cb90b3730d [Libraries] Dependency (#6)
This PR contains the work that implements the Dependency service, which is used as a dependency injection mechanism in the application.

To give further details on what was done:
- [x] created the `Dependency` library into the **Libraries** package;
- [x] defined the `DependencyKey` protocol;
- [x] implemented the `DependencyService` service;
- [x] implemented the `Dependency` property wrapper.

Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Reviewed-on: rock-n-code/deep-linking-assignment#6
2023-04-11 00:41:07 +00:00

75 lines
1.5 KiB
Swift

//
// DependencyTests.swift
// DependencyTests
//
// Created by Javier Cicchelli on 11/04/2023.
// Copyright © 2023 Röck+Cöde. All rights reserved.
//
import XCTest
@testable import Dependency
final class DependencyTests: XCTestCase {
// MARK: Properties
private var subject: TestSubject!
// MARK: Setup
override func setUp() {
DependencyService[\.testService] = SomeService()
}
// MARK: Tests
func test_readTestService() {
// GIVEN
subject = .init()
// WHEN
let service = subject.testService
// THEN
XCTAssertNotNil(service)
XCTAssert(service is SomeService)
}
func test_writeDependencyKey() async throws {
// GIVEN
subject = .init()
subject.testService = SomeOtherService()
// WHEN
let service = DependencyService[\.testService]
// THEN
XCTAssertNotNil(service)
XCTAssert(service is SomeOtherService)
}
func test_writeDependencyKeyTwice() async throws {
// GIVEN
subject = .init()
subject.testService = SomeOtherService()
subject.testService = SomeService()
// WHEN
let service = DependencyService[\.testService]
// THEN
XCTAssertNotNil(service)
XCTAssert(service is SomeService)
}
}
// MARK: - TestSubject
private struct TestSubject {
@Dependency(\.testService) var testService
}