public void IndexOfSpanTest()
{
Span span1 = new Span()
{
Text = "This is sample text."
};
Span span2 = new Span()
{
Text = "This is text."
};
Span span3 = new Span()
{
Text = "That is text."
};
Assert.AreEqual(text.IndexOfSpan(span1), 0);
Assert.AreEqual(text.IndexOfSpan(span2), 4);
Assert.AreEqual(text.IndexOfSpan(span1, 1), -1);
Assert.AreEqual(text.IndexOfSpan(span2, 0, 1), -1);
Assert.AreEqual(text.IndexOfSpan(span3), -1);
}
