def test_incompatible_different_hashes(self):
# S1 and S2 will have default and therefore different random seeds.
s1 = AnySketch(
SketchConfig([IndexSpecification(UniformDistribution(10), 'uniform')],
num_hashes=2,
value_functions=[SumFunction()]))
s2 = AnySketch(
SketchConfig([IndexSpecification(UniformDistribution(10), 'uniform')],
num_hashes=2,
value_functions=[SumFunction()]))
with self.assertRaises(AssertionError):
s1.assert_compatible(s2)
def test_incompatible_different_configs_value_function(self):
# S1 and S2 have different value function in sketch config.
s1 = AnySketch(
SketchConfig([IndexSpecification(UniformDistribution(10), 'uniform')],
num_hashes=1,
value_functions=[SumFunction()]), 42)
s2 = AnySketch(
SketchConfig([IndexSpecification(UniformDistribution(10), 'uniform')],
num_hashes=1,
value_functions=[BitwiseOrFunction()]), 42)
with self.assertRaises(AssertionError):
s1.assert_compatible(s2)
def test_run_through_compatible_sketches(self):
# S1 and S2 are compatible.
s1 = AnySketch(
SketchConfig([IndexSpecification(UniformDistribution(10), 'uniform')],
num_hashes=1,
value_functions=[SumFunction()]), 42)
s2 = AnySketch(
SketchConfig([IndexSpecification(UniformDistribution(10), 'uniform')],
num_hashes=1,
value_functions=[SumFunction()]), 42)
self.assertTrue(
s1.assert_compatible(s2),
'Two sketches are compatible, yet raises error.')
def test_basic_capabilities(self):
s = AnySketch(
SketchConfig([IndexSpecification(UniformDistribution(10), 'uniform')],
num_hashes=1,
value_functions=[SumFunction()]))
s.add_ids([1, 1])
self.assertIn(1, s)
self.assertEqual(s.max_size(), 10)
self.assertTrue(s.assert_compatible(s))
def test_get_active_register_indices(self):
s = AnySketch(
SketchConfig(
[IndexSpecification(UniformDistribution(2), 'uniform')],
num_hashes=1,
value_functions=[SumFunction()]), 42)
s.add(1)
expected = np.array([1])
np.testing.assert_equal(s.get_active_register_indices(), expected)
def test_get_active_register_indices_raises(self):
s = AnySketch(
SketchConfig([
IndexSpecification(UniformDistribution(2), 'uniform'),
IndexSpecification(UniformDistribution(4), 'uniform')
],
num_hashes=1,
value_functions=[SumFunction()]), 84)
s.add(1)
with self.assertRaises(AssertionError):
s.get_active_register_indices()
def test_with_custom_hash_function(self):
class TestHash(object):
def __init__(self, seed):
self.seed = seed
def __call__(self, x):
return 1
s1 = AnySketch(
SketchConfig([IndexSpecification(UniformDistribution(2), 'uniform'),
IndexSpecification(UniformDistribution(4), 'uniform')],
num_hashes=3,
value_functions=[SumFunction()]), 42, TestHash)
s1.add(1)
expected = np.array([[0, 0, 0, 0], [0, 3, 0, 0]])
self.assertLen(s1.sketch, len(expected))
for i, sketch in enumerate(expected):
np.testing.assert_equal(s1.sketch[i], sketch)