TDD FileLoader v1.3.

Unit test modified so it is build pipeline friendly and does not break the tenants of good Unit Testing

The Unit Test

     // Redesign has worked so this test uses a stub to simulate a file being
     // loaded, it is passed in as lambda - We've decoupled ourselves from the 
     // filesystem
     @Test
     public void load_all_of_file_via_stub() 
     {
         // arrange
         String fileToLoad = "";
         FileLoader cut = new FileLoader(fileToLoad);
         int expectedBytesRead = 10;
         
         // act
         int bytesRead = cut.loadFile((fname) ->
         {
            List<String> result = new ArrayList<>();
            
            result.add("Hello");
            result.add("world");

            return result;
         });
         
         // assert
         assertEquals(expectedBytesRead, bytesRead);
     }