public void ToString_Test()
{
// arrange
MockItem testItem = new MockItem();
testItem.Id = 1;
testItem.Title = "Test item";
testItem.Type = ItemType.Book;
string expectedResult = "Id: " + "\r\n" +
"1" + "\r\n" +
"" + "\r\n" +
"Title: " + "\r\n" +
"Test item" + "\r\n" +
"" + "\r\n" +
"Type: " + "\r\n" +
"Book";
// act
string actualResult = testItem.ToString();
// assert
Assert.AreEqual(expectedResult, actualResult);
}