def test_perturb_int_factor(self, factor):
explore = PerturbExplore(factor=factor)
rng = RNGStub()
rng.random = lambda: 1.0
assert explore.perturb_int(rng, 5,
(0, 10)) == int(numpy.round(5 * factor))
rng.random = lambda: 0.0
assert explore.perturb_int(rng, 5,
(0, 10)) == int(numpy.round(5 / factor))
def test_perturb_int_no_out_of_bounds(self):
explore = PerturbExplore(factor=0.75, volatility=0)
rng = RNGStub()
rng.random = lambda: 1.0
rng.normal = lambda mean, variance: variance
assert explore.perturb_int(rng, 0, (0, 10)) == 0
rng.random = lambda: 0.0
rng.normal = lambda mean, variance: variance
assert explore.perturb_int(rng, 10, (0, 10)) == 10
def test_perturb_int_no_duplicate_below(self):
explore = PerturbExplore(factor=0.75)
rng = RNGStub()
rng.random = lambda: 1.0
assert explore.perturb_int(rng, 1, (0, 10)) == 0
def test_perturb_int_duplicate_equal(self):
explore = PerturbExplore(factor=1.0)
rng = RNGStub()
rng.random = lambda: 1.0
assert explore.perturb_int(rng, 1, (0, 10)) == 1