public void ToStringMethodWorksCorrectly()
{
var displayText = new DisplayText();
//return empty string if it contains nothing
Assert.Equal("", displayText.ToString());
//returns single line if it has only one line
var value = "Hello World!";
displayText.Add(value);
Assert.Equal(value, displayText.ToString());
//returns multiple lines seperated by '/r/n' if it has multiple lines
displayText.Add(value);
Assert.Equal(value + "/r/n" + value, displayText.ToString());
}
