         let stringService = sut.service(for:String.self)
         let stringableService = sut.service(for:Stringable.self)
         
-        XCTAssertEqual(result, Set<String>())
+        XCTAssertTrue(result.isEmpty)
         XCTAssertNil(stringService)
         XCTAssertNil(stringableService)
     }

    func test_givenNoRegistration_whenUnRegisterAll_thenNoTypes() {
        sut.unregisterAll()
        let result = sut.types
        XCTAssertEqual(result, Set<String>())
    }
    
    func test_givenRegistration2Service_whenUnregisterAll_thenNoTypesNorInstance() {

    
    func test_givenNoRegistration_whenUnregisterForType_thenNoTypes() {
        sut.unregisterService(for: String.self)
        XCTAssertTrue(sut.types.isEmpty)
    }
}
