public void editTest() { // test erase and edit. var writer = new Pencil(); writer.write("An apple a day keeps the doctor away."); writer.erase("apple"); Assert.AreEqual(writer.sheet, "An a day keeps the doctor away."); writer.edit(3, "onion"); Assert.AreEqual(writer.sheet, "An onion a day keeps the doctor away."); // Now edit in something too big forthe gap. writer.erase("onion"); Assert.AreEqual(writer.sheet, "An a day keeps the doctor away."); writer.edit(3, "artichoke"); Assert.AreEqual(writer.sheet, "An artich@k@ay keeps the doctor away."); }