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.");
}
