test: added tests for data injection

Data/Tests/DataTests/Injection/DataInjectionTests.swift

@@ -0,0 +1,56 @@
+//
+//  Created by Jeroen Bakker on 30/08/2023.
+//  Copyright (c) 2023 Bleacher Report. All rights reserved.
+//
+
+import XCTest
+import Factory
+@testable import Data
+
+final class DataInjectionTests: XCTestCase {
+
+    func test_singletons_onUrlSession_shouldReturnSameReference() {
+        // given
+        Container.registerAllServices()
+
+        // when
+        let urlSession1 = Container.Singletons.urlSession.callAsFunction() as? URLSession
+        let urlSession2 = Container.Singletons.urlSession.callAsFunction() as? URLSession
+
+        // then
+        XCTAssertTrue(urlSession1 === urlSession2)
+    }
+
+    func test_workers_onAPI_shouldReturnService() {
+        // given
+        Container.registerAllServices()
+
+        // when
+        let result = Container.Workers.api.callAsFunction()
+
+        // then
+        XCTAssertTrue(result is APIService)
+    }
+
+    func test_mappers_onSearchPhotoResult_shouldReturnMapper() {
+        // given
+        Container.registerAllServices()
+
+        // when
+        let result = Container.Mappers.searchPhotosResult.callAsFunction()
+
+        // then
+        XCTAssertNotNil(result)
+    }
+
+    func test_mappers_onPhoto_shouldReturnMapper() {
+        // given
+        Container.registerAllServices()
+
+        // when
+        let result = Container.Mappers.photo.callAsFunction()
+
+        // then
+        XCTAssertNotNil(result)
+    }
+}