def testZip(self):
l = Stream.zip(range(5),
Stream.number(start=4, step=-1).take(8)).to_list()
self.assertEqual(5, len(l))
self.assertTrue(
Stream(l).map(lambda tup: tup[0] + tup[1]).all(lambda x: x == 4))
l = Stream.number(start=4,
step=-1).take(8).zip_with(range(5)).to_list()
self.assertEqual(5, len(l))
self.assertTrue(
Stream(l).map(lambda tup: tup[0] + tup[1]).all(lambda x: x == 4))
def testToMap(self):
m = Stream.zip(range(5),
Stream.number(start=4, step=-1).take(3)).to_map()
self.assertEqual(3, len(m))
self.assertEqual(4, m[0])
self.assertEqual(3, m[1])
self.assertEqual(2, m[2])
m = Stream.number().take(3).to_map(key=lambda it: it,
value=lambda it: it * 2)
self.assertEqual(2, m[1])
self.assertEqual(4, m[2])
self.assertEqual(0, m[0])
