public void ODtextBox_SpellCheck_GetVisibleCharIndices() { ODtextBox textBox = GetTextBox("abc" + "\n" + "def" + "\n" + "ghi"); //Test the Function ODtextBox.CharBounds indexes = textBox.GetVisibleCharIndices(); Assert.AreEqual(0, indexes.StartCharIndex); Assert.AreEqual(textBox.TextLength - 1, indexes.EndCharIndex); }