public void AddBookReaderTest()
{
int beforeSize = context.bookReader.Count;
var beforeLastBookReader = context.bookReader.Last();
var bookReaderToAdd = new BookReader()
{
Age = 18,
FirstName = "Oskar",
LastName = "Neuman",
Telephone = "665456789"
};
repository.AddBookReader(bookReaderToAdd);
int afterSize = context.bookReader.Count;
var afterLastBookReader = context.bookReader.Last();
// check sizes
Assert.AreNotEqual(beforeSize, afterSize);
// check if last books aren't equal
Assert.AreNotEqual(beforeLastBookReader, afterLastBookReader);
// check if the book is in the list
Assert.IsTrue(context.bookReader.Contains(bookReaderToAdd));
}