def test_basicfunctionality(self):
self.assertEqual(binary_search(self.input,5),5)
self.assertEqual(binary_search([5], 5), 0)
self.assertEqual(binary_search([5], 4), -1)
self.assertEqual(binary_search(self.input, 5, 1,3), -1)
self.assertEqual(binary_search(self.input, 2, 1,3), 2)
self.assertEqual(binary_search(self.input, 2, 3, 1), -1)
self.assertEqual(binary_search(self.input, 2, 2, 2), 2)
self.assertEqual(binary_search(self.input, 5, 2, 2), -1)
def test_badinput(self):
import numpy as np
self.assertEqual(binary_search([1,2,np.inf], 2), 1)
self.assertEqual(binary_search([1,2,np.inf], np.inf), 2)
self.assertEqual(binary_search([],1),-1)
with self.assertRaises(TypeError):
binary_search(['a',3],1)
with self.assertRaises(TypeError):
binary_search(['a',3],'a')
def test_mymath(self):
# Test empty array
self.assertEqual(binary_search([], 2), -1)
# Test array with nans
self.assertEqual(binary_search(['nan', 1, 2], 2), 2)
# Test array of length 1
self.assertEqual(binary_search([1], 1), 0)
# Test array of length 2
self.assertEqual(binary_search([0,10], 10), 1)
# Test needle greater than the range of the array
self.assertEqual(binary_search(range(10), 11), -1)
# Test needle at extreme of array
self.assertEqual(binary_search(range(5), 4), 4)
def test_wierd_inputs(self):
# Test NaN
test_list = list(range(9)) + [np.nan]
self.assertEqual(binary_search(test_list, np.nan), (len(test_list) - 1) // 2) # Always returns midpoint! Undesirable?
# Test empty
self.assertEqual(binary_search([], 12), -1)
# Test left right inversion
self.assertEqual(binary_search(test_list, 5, 8, 2), -1)
self.assertEqual(binary_search(test_list, 5, 1, 11), 5)
with self.assertRaises(IndexError):
binary_search(test_list, 21, 1, 15)
def manual_binsearch():
print("Think of a number between 0 and 100.")
print("I will guess it after you answer 7 simple yes/no questions.")
qnum = 0
def manual_testfn(tested_value):
nonlocal qnum
qnum += 1
for _ in range(0,3):
question = str(qnum) + ": Is your number lower than "+str(tested_value)+"? [y/n]: "
input_var = input(question)
if input_var.lower().startswith('y'):
return True
if input_var.lower().startswith('n'):
return False
else:
print("Invalid answer. Please answer y or n.")
print("Too many invalid answers were given. Exiting..")
exit()
result = binary_search(manual_testfn, 0, 100)
print("Your number was " + str(result))
def test_big():
assert binary_search([2, 3, 4, 5], 5) == 3
def test_binary_too_small():
assert binary_search([2, 3], 1) == -1
def test_1():
assert binary_search(input, 5) == 5
def test_needle_1():
assert binary_search(input, 5, 2, 2) == -1
def test_missing_args():
with raises(TypeError):
binary_search([1, 2])
def test_4():
assert binary_search([5], 4) == -1
def test_needle_5():
assert binary_search(input, 9) == 9
def test_needle_4():
assert binary_search(input, 2, 3, 1) == -1
def test_needle_3():
assert binary_search(input, 2, 1,3) == 2
def test_needle_2():
assert binary_search(input, 2, 2, 2) == 2
def test_sort(self):
input = [2,1,3,4,0,23,18]
with self.assertRaises(AssertionError):
binary_search(input,2)
def test_2():
assert binary_search(input, 4.5) == -1
def test_both():
assert binary_search([5], 7) == -1
def test_6():
binary_search(input, 11) == -1
def test_1():
assert binary_search(input, 5) == 5
def test_other():
assert binary_search(['hello', 'there', 'you', 'abc'], 'abc') == -1
def test_empty():
assert binary_search([], 1) == -1
def test_needle_3():
assert binary_search(input, 2, 1, 3) == 2
def test_oneelem():
assert binary_search([9], 9) == 0
def test_both():
assert binary_search([5], 7) == -1
def test_twoelem_first():
assert binary_search([10, 50], 10) == 0
def test_middle_needle():
assert binary_search([2, 4], 3) == -1
def test_twoelem_second():
assert binary_search([10, 50], 50) == 1
def test_binary_search():
input = list(range(10))
assert binary_search(input, 5) == 5
def test_negative():
assert binary_search([-10.5, -5.2, 10, 20.3, 30.9], -5.2), 1
def test_overflow(self):
input = list(range(10))
self.assertEqual(binary_search(input,np.inf+1),-1)
def test_multiple_res():
res = binary_search([1, 10, 10, 10, 50], 10)
assert (res >=1 and res <= 3)
def test_binsearch(self):
input = list(range(10))
self.assertEqual(binary_search(input,5), 5)
def test_lt_range(input_data):
assert binary_search(input_data, -10) == -1
def test_3():
assert binary_search([5], 5) == 0
def test_gt_range(input_data):
assert binary_search(input_data, 10000) == -1
def test_5():
binary_search([], 4) == -1
def test_not_found_inrange(input_data):
assert binary_search(input_data, 11) == -1
def test_not_alist():
with raises(TypeError):
binary_search('a', 1)
def test_unsorted():
assert binary_search([10, 5, 3, 5], 4) == -1
def test_not_numeric():
assert binary_search(['a', 'b'], 'b') == 1
def test_weird_data():
with raises(TypeError):
binary_search([np.nan(), None, 0.1, 0.5], 0.5)
def test_nan():
assert binary_search([np.nan, 0, 2, 3, 4], np.nan) == 2
def test_name_NAN():
with raises(NameError):
binary_search([NAN, 1], 3)
def test_needle_2():
assert binary_search(input, 2, 2, 2) == 2
def test_left_equal_right_diff_needle():
assert binary_search(input, 5, 2, 2) == -1
def test_needle_4():
assert binary_search(input, 2, 3, 1) == -1
def test_Nan(self):
input = [np.nan]*5
with self.assertRaises(TypeError):
binary_search(input,2)
def test_needle_5():
assert binary_search(input, 9) == 9
def test_numeric(self):
input=['a']*5
with self.assertRaises(TypeError):
binary_search(input,3)
def test_binary_too_big():
assert binary_search([2, 3], 4) == -1
def test_empty(self):
self.assertEqual(binary_search([],1),-1)
def test_binary_NaN():
assert binary_search([2, 3, 'a'], 1) == -1
def test_boundary(self):
input = list(range(10))
self.assertEqual(binary_search(input,1,3,1),-1)
def test_small():
assert binary_search([2, 3, 4, 5], 2) == 0
def test_needle_oversize(self):
input = list(range(10))
self.assertEqual(binary_search(input,11),-1)
self.assertEqual(binary_search(input,-1),-1)
def test_doubles():
assert (binary_search([2, 2], 2) == 0 or binary_search([2, 2], 2) == 1)
def test_extremes(self):
input = list(range(10))
self.assertEqual(binary_search(input,9),9)
self.assertEqual(binary_search(input,0),0)
def test_empty_array():
assert binary_search([], 4) == -1
def test_multiple(self):
input = [3]*10
self.assertEqual(binary_search(input,3),0)
