public void GetSelectionStart_Test()
{
// Arrange
var text = "Hello";
// Act
Assert.AreEqual(text.Length, TextBoxBehavior.GetSelectionStart(text));
}
public void Filter_Test()
{
// Arrange
var text = ".H.e-l,lo.-,";
// Act
string actual = string.Empty;
// Here simulate adding char at a time. Something like user is typing and filter removes wrong characters.
for (int i = 0; i < text.Length; i++)
{
actual += text[i];
actual = TextBoxBehavior.Filter(actual, ".-,");
}
// Assert
Assert.AreEqual("Hello", actual);
}