def testGetRapporMasksWithOnePRR(self):
# Set randomness function to be used to sample 32 random bits
# Set randomness function that takes two integers and returns a
# random integer cohort in [a, b]
params = copy.copy(self.typical_instance)
params.flag_oneprr = True
num_words = params.num_bloombits // 32 + 1
rand = MockRandom()
rand_funcs = rappor.SimpleRandFuncs(params, rand)
# First two calls to get_rappor_masks for identical inputs
# Third call for a different input
print '\tget_rappor_masks 1'
cohort_1, f_bits_1, mask_indices_1 = rappor.get_rappor_masks(
"0", "abc", params, rand_funcs)
print '\tget_rappor_masks 2'
cohort_2, f_bits_2, mask_indices_2 = rappor.get_rappor_masks(
"0", "abc", params, rand_funcs)
print '\tget_rappor_masks 3'
cohort_3, f_bits_3, mask_indices_3 = rappor.get_rappor_masks(
"0", "abcd", params, rand_funcs)
# First two outputs should be identical, i.e., identical PRRs
self.assertEquals(f_bits_1, f_bits_2)
self.assertEquals(mask_indices_1, mask_indices_2)
self.assertEquals(cohort_1, cohort_2)
# Third PRR should be different from the first PRR
self.assertNotEqual(f_bits_1, f_bits_3)
self.assertNotEqual(mask_indices_1, mask_indices_3)
self.assertNotEqual(cohort_1, cohort_3)
# Now testing with flag_oneprr false
params.flag_oneprr = False
cohort_1, f_bits_1, mask_indices_1 = rappor.get_rappor_masks(
"0", "abc", params, rand_funcs)
cohort_2, f_bits_2, mask_indices_2 = rappor.get_rappor_masks(
"0", "abc", params, rand_funcs)
self.assertNotEqual(f_bits_1, f_bits_2)
self.assertNotEqual(mask_indices_1, mask_indices_2)
self.assertNotEqual(cohort_1, cohort_2)
def testGetRapporMasksWithOnePRR(self):
# Set randomness function to be used to sample 32 random bits
# Set randomness function that takes two integers and returns a
# random integer cohort in [a, b]
params = copy.copy(self.typical_instance)
params.flag_oneprr = True
num_words = params.num_bloombits // 32 + 1
rand = MockRandom()
rand_funcs = rappor.SimpleRandFuncs(params, rand)
# First two calls to get_rappor_masks for identical inputs
# Third call for a different input
print '\tget_rappor_masks 1'
cohort_1, f_bits_1, mask_indices_1 = rappor.get_rappor_masks(
"0", "abc", params, rand_funcs)
print '\tget_rappor_masks 2'
cohort_2, f_bits_2, mask_indices_2 = rappor.get_rappor_masks(
"0", "abc", params, rand_funcs)
print '\tget_rappor_masks 3'
cohort_3, f_bits_3, mask_indices_3 = rappor.get_rappor_masks(
"0", "abcd", params, rand_funcs)
# First two outputs should be identical, i.e., identical PRRs
self.assertEquals(f_bits_1, f_bits_2)
self.assertEquals(mask_indices_1, mask_indices_2)
self.assertEquals(cohort_1, cohort_2)
# Third PRR should be different from the first PRR
self.assertNotEqual(f_bits_1, f_bits_3)
self.assertNotEqual(mask_indices_1, mask_indices_3)
self.assertNotEqual(cohort_1, cohort_3)
# Now testing with flag_oneprr false
params.flag_oneprr = False
cohort_1, f_bits_1, mask_indices_1 = rappor.get_rappor_masks(
"0", "abc", params, rand_funcs)
cohort_2, f_bits_2, mask_indices_2 = rappor.get_rappor_masks(
"0", "abc", params, rand_funcs)
self.assertNotEqual(f_bits_1, f_bits_2)
self.assertNotEqual(mask_indices_1, mask_indices_2)
self.assertNotEqual(cohort_1, cohort_2)
def testGetRapporMasksWithoutOnePRR(self):
params = copy.copy(self.typical_instance)
params.prob_f = 0.5 # For simplicity
num_words = params.num_bloombits // 32 + 1
rand = MockRandom()
rand_funcs = rappor.SimpleRandFuncs(params, rand)
rand_funcs.cohort_rand_fn = (lambda a, b: a)
assigned_cohort, f_bits, mask_indices = rappor.get_rappor_masks(
0, ["abc"], params, rand_funcs)
self.assertEquals(0, assigned_cohort)
self.assertEquals(0x000db6d, f_bits) # dependent on 3 MockRandom values
self.assertEquals(0x0006db6, mask_indices)
def testGetRapporMasksWithoutOnePRR(self):
params = copy.copy(self.typical_instance)
params.prob_f = 0.5 # For simplicity
num_words = params.num_bloombits // 32 + 1
rand = MockRandom()
rand_funcs = rappor.SimpleRandFuncs(params, rand)
rand_funcs.cohort_rand_fn = (lambda a, b: a)
assigned_cohort, f_bits, mask_indices = rappor.get_rappor_masks(
0, ["abc"], params, rand_funcs)
self.assertEquals(0, assigned_cohort)
self.assertEquals(0x000db6d,
f_bits) # dependent on 3 MockRandom values
self.assertEquals(0x0006db6, mask_indices)
