public void CacheIsLocalToSubclass()
{
StringWriter sw = new StringWriter();
FormatterOne f1 = new FormatterOne();
FormatterTwo f2 = new FormatterTwo();
DateTime dt1 = DateTime.Today.AddMinutes(10);
f1.Format(dt1, sw);
f2.Format(dt1, sw);
Assert.AreEqual(2, FormatterOne.invocations);
}
public void CacheWorksForSameTicks()
{
StringWriter sw = new StringWriter();
FormatterOne f1 = new FormatterOne();
FormatterOne f2 = new FormatterOne();
DateTime dt = DateTime.Now;
f1.Format(dt, sw);
f2.Format(dt, sw);
Assert.AreEqual(1, FormatterOne.invocations);
}
public void CacheExpiresWhenCrossingSecond()
{
StringWriter sw = new StringWriter();
FormatterOne f1 = new FormatterOne();
FormatterOne f2 = new FormatterOne();
DateTime dt1 = DateTime.Today.AddMinutes(1);
DateTime dt2 = dt1.AddMilliseconds(1100);
f1.Format(dt1, sw);
f2.Format(dt2, sw);
Assert.AreEqual(2, FormatterOne.invocations);
}
public void CacheWorksForSameSecond()
{
StringWriter sw = new StringWriter();
FormatterOne f1 = new FormatterOne();
FormatterOne f2 = new FormatterOne();
DateTime dt1 = DateTime.Today;
DateTime dt2 = dt1.AddMilliseconds(600);
f1.Format(dt1, sw);
f2.Format(dt2, sw);
Assert.AreEqual(1, FormatterOne.invocations);
}