def testEnd(self):
size = len(self.data)
s = stream.substream(self.s, size-4, size)
self.assertEquals('tree', self.suckTheMarrow(s))
def testNotStart(self):
s = stream.substream(self.s, 12, 26)
self.assertEquals('with my friend', self.suckTheMarrow(s))
def testEmptySubstream(self):
s = stream.substream(self.s, 11, 11)
self.assertEquals('', self.suckTheMarrow(s))
def testStart(self):
s = stream.substream(self.s, 0, 11)
self.assertEquals('I was angry', self.suckTheMarrow(s))