/*fake method that returns a string simulating a database query*/
def fake_dependancy() : String = "gazorpian"

/*function that needs to be tested*/
def method_that_takes_dependancy(dependancy:() => String) = (name:String) =>  {
  val alien_name = dependancy()
  name == alien_name
}
/*We first pass in the fake dependancy to the method, which returns a new function containing all the logic we need to test*/
val function_whose_logic_needs_to_be_tested  = method_that_takes_dependancy(fake_dependancy)
println(function_whose_logic_needs_to_be_tested("gazorpian")) //returns : true