def test_zero(self):
xs = "abcdefg"
actual = data_provider._downsample(xs, k=0)
self.assertEqual(actual, [])
def test_underlong_ok(self):
xs = list("abcdefg")
actual = data_provider._downsample(xs, k=10)
expected = list("abcdefg")
self.assertIsNot(actual, xs)
self.assertEqual(actual, expected)
def test_inorder(self):
xs = list(range(10000))
actual = data_provider._downsample(xs, k=100)
self.assertEqual(actual, sorted(actual))
def test_deterministic(self):
xs = "abcdefg"
expected = data_provider._downsample(xs, k=4)
for _ in range(100):
actual = data_provider._downsample(xs, k=4)
self.assertEqual(actual, expected)
