@model
operation prepareModels() {
   var bA = new A!Book;
   bA.title = 'Hello World';

   // Try changing this to a different string and watch EUnit fail the test.
   var bB  := new B!Book;
   bB.title = 'Hello World';
}

@test
operation shouldBeEqual() {
  assertEqualModels("A", "B");
}