public void FormatUsingDefaults()
{
IntegerFormatter fmt = new IntegerFormatter();
Assert.AreEqual("1234", fmt.Format(1234));
Assert.AreEqual("-1234", fmt.Format(-1234));
}
public void FormatUsingCustomSettings()
{
IntegerFormatter fmt = new IntegerFormatter("{0:00000}");
Assert.AreEqual("01234", fmt.Format(1234));
Assert.AreEqual("-01234", fmt.Format(-1234));
fmt = new IntegerFormatter("{0,10}");
Assert.AreEqual(" 1234", fmt.Format(1234));
fmt = new IntegerFormatter("{0,-10}");
Assert.AreEqual("1234 ", fmt.Format(1234));
fmt = new IntegerFormatter("{0:(###) ###-####}");
Assert.AreEqual("(813) 555-4034", fmt.Format(8135554034));
}
public void FormatNonNumber()
{
IntegerFormatter fmt = new IntegerFormatter();
Assert.Throws <ArgumentException>(() => fmt.Format("not a number"));
}
public void FormatNullValue()
{
IntegerFormatter fmt = new IntegerFormatter();
Assert.Throws <ArgumentNullException>(() => fmt.Format(null));
}