Unit tests in Swift for async/await

asynctests.swift

import XCTest
@testable import AsyncAwaitModule

class AsyncAwaitModuleTests: XCTestCase {

    // note the complexity in this unit test
  
    func testClosure() throws {
        let expectation = expectation(description: "posts fetch")
        PostsService().fetchPosts { result in
            let posts = try? result.get()
            XCTAssert(!(posts?.isEmpty ?? true))
            expectation.fulfill()
        }
        wait(for: [expectation], timeout: 4.0)
    }

    // and then with async/await, it becomes effortless.
  
    func testAsync() async throws {
        let posts = try await PostsService().posts()
        XCTAssert(!posts.isEmpty)
    }

}