Saving Data

.swift

class When_Trying_To_Save_User : XCTestCase {
    
    private var dataAccess :DataAccess!
    
    override func setUp() {
        super.setUp()
        
        self.dataAccess = DataAccess()
    }
    
    func test_should_save_user_successfully() {
        
        let user = User(username :"johndoe", password: "password")
        _ = self.dataAccess.saveUser(user)
        
      // You can also get the user and compare the values of the username and password properties 
        XCTAssertTrue(self.dataAccess.getUsers().count == 1)
    }
}