app-reviews/Libraries/Coordination/Test/Tests/Protocols/CoordinatorTests.swift

//
//  CoordinatorTests.swift
//  ReviewsCoordinationTest
//
//  Created by Javier Cicchelli on 21/03/2024.
//  Copyright © 2024 Röck+Cöde. All rights reserved.
//

import ReviewsCoordinationKit
import UIKit
import XCTest

final class CoordinatorTests: XCTestCase {
    
    // MARK: Properties
    private var router: SpyRouter!
    private var coordinator: Coordinator!
    
    // MARK: Tests
    func testPresent_withoutOnDismissClosure() {
        // Executing this test on the main thread is required as a `UIViewController` instance in being initialised here.
        DispatchQueue.main.async {
            // GIVEN
            self.router = SpyRouter()
            self.coordinator = SomeCoordinator(router: self.router)

            // WHEN
            self.coordinator.present(
                animated: false,
                onDismiss: nil
            )
            
            // THEN
            XCTAssertTrue(self.coordinator.children.isEmpty)
            XCTAssertEqual(self.router.state, .presented)
            XCTAssertTrue(self.router.viewController is SomeViewController)
            XCTAssertFalse(self.router.animated ?? true)
            XCTAssertNil(self.router.onDismiss)
        }
    }
    
    func testPresent_withOnDismissClosure() {
        // Executing this test on the main thread is required as a `UIViewController` instance in being initialised here.
        DispatchQueue.main.async {
            // GIVEN
            self.router = SpyRouter()
            self.coordinator = OtherCoordinator(router: self.router)
            
            // WHEN
            self.coordinator.present(animated: true) {}
            
            // THEN
            XCTAssertTrue(self.coordinator.children.isEmpty)
            XCTAssertEqual(self.router.state, .presented)
            XCTAssertTrue(self.router.viewController is OtherViewController)
            XCTAssertTrue(self.router.animated ?? false)
            XCTAssertNotNil(self.router.onDismiss)
        }
    }
    
    func testPresentChild_withoutOnDismissClosure() {
        // Executing this test on the main thread is required as a `UIViewController` instance in being initialised here.
        DispatchQueue.main.async {
            // GIVEN
            self.router = SpyRouter()
            self.coordinator = SomeCoordinator(router: self.router)
            
            let child = OtherCoordinator(router: self.router)
            
            // WHEN
            self.coordinator.present(
                child: child,
                animated: false
            )
            
            // THEN
            XCTAssertFalse(self.coordinator.children.isEmpty)
            XCTAssertEqual(self.coordinator.children.count, 1)
            XCTAssertEqual(self.router.state, .presented)
            XCTAssertTrue(self.router.viewController is OtherViewController)
            XCTAssertFalse(self.router.animated ?? true)
            XCTAssertNil(self.router.onDismiss)
        }
    }
    
    func testPresentChild_withOnDismissClosure() {
        // Executing this test on the main thread is required as a `UIViewController` instance in being initialised here.
        DispatchQueue.main.async {
            // GIVEN
            self.router = SpyRouter()
            self.coordinator = OtherCoordinator(router: self.router)
            
            let child = SomeCoordinator(router: self.router)
            
            // WHEN
            self.coordinator.present(
                child: child,
                animated: true
            ) {}
            
            // THEN
            XCTAssertFalse(self.coordinator.children.isEmpty)
            XCTAssertEqual(self.coordinator.children.count, 1)
            XCTAssertEqual(self.router.state, .presented)
            XCTAssertTrue(self.router.viewController is SomeViewController)
            XCTAssertTrue(self.router.animated ?? false)
            XCTAssertNotNil(self.router.onDismiss)
        }
    }
    
    func testDismiss_notAnimated() {
        // GIVEN
        router = SpyRouter()
        coordinator = OtherCoordinator(router: router)
        
        // WHEN
        coordinator.dismiss(animated: false)
        
        // THEN
        XCTAssertTrue(coordinator.children.isEmpty)
        XCTAssertEqual(router.state, .dismissed)
        XCTAssertNil(router.viewController)
        XCTAssertFalse(router.animated ?? true)
        XCTAssertNil(router.onDismiss)
    }
    
    func testDismiss_animated() {
        // GIVEN
        router = SpyRouter()
        coordinator = OtherCoordinator(router: router)
        
        // WHEN
        coordinator.dismiss(animated: true)
        
        // THEN
        XCTAssertTrue(coordinator.children.isEmpty)
        XCTAssertEqual(router.state, .dismissed)
        XCTAssertNil(router.viewController)
        XCTAssertTrue(router.animated ?? false)
        XCTAssertNil(router.onDismiss)
    }
    
}