def test_iter(self):
view = iterutils.list_view(self.data)
self.assertEqual(list(iter(view)), self.data)
view = iterutils.list_view(self.data, 2)
self.assertEqual(list(iter(view)), [3, 4])
view = iterutils.list_view(self.data, 2, 3)
self.assertEqual(list(iter(view)), [3])
def test_slice(self):
view = iterutils.list_view(self.data)
viewslice = view[1:3]
self.assertEqual(list(iter(viewslice)), [2, 3])
self.assertRaises(ValueError, view.__getitem__, slice(None, None, 2))
view = iterutils.list_view(self.data, 1)
viewslice = view[1:3]
self.assertEqual(list(iter(viewslice)), [3, 4])
def test_index(self):
view = iterutils.list_view(self.data)
self.assertEqual(view[2], 3)
self.assertRaises(IndexError, view.__getitem__, -1)
self.assertRaises(IndexError, view.__getitem__, 4)
view = iterutils.list_view(self.data, 2)
self.assertEqual(view[1], 4)
self.assertRaises(IndexError, view.__getitem__, -1)
self.assertRaises(IndexError, view.__getitem__, 2)
view = iterutils.list_view(self.data, 2, 3)
self.assertEqual(view[0], 3)
self.assertRaises(IndexError, view.__getitem__, -1)
self.assertRaises(IndexError, view.__getitem__, 1)
def test_split_at(self):
view = iterutils.list_view(self.data)
a, b = view.split_at(2)
self.assertEqual(list(a), [1, 2])
self.assertEqual(list(b), [3, 4])
a, b = view.split_at(-1)
self.assertEqual(list(a), [])
self.assertEqual(list(b), [1, 2, 3, 4])
a, b = view.split_at(10)
self.assertEqual(list(a), [1, 2, 3, 4])
self.assertEqual(list(b), [])
def test_len(self):
self.assertEqual(len( iterutils.list_view(self.data) ), 4)
self.assertEqual(len( iterutils.list_view(self.data, 2) ), 2)
self.assertEqual(len( iterutils.list_view(self.data, 2, 3) ), 1)