def test_empty_array(self):
empty_array = []
target_number = 1
test_search = BinarySearch(empty_array, target_number)
self.assertEqual(-1, test_search.search_index_of_target_number())
def test_odd_numbers_array_without_target_number(self):
odd_numbers_array = [1, 3, 5, 7, 9]
target_number = 0
test_search = BinarySearch(odd_numbers_array, target_number)
self.assertEqual(-1, test_search.search_index_of_target_number())
def test_even_numbers_array_without_target_number(self):
even_numbers_array = [1, 3, 5, 7]
target_number = 9
test_search = BinarySearch(even_numbers_array, target_number)
self.assertEqual(-1, test_search.search_index_of_target_number())
def test_two_numbers_array_without_target_number(self):
two_numbers_array = [1, 3]
target_number = 2
test_search = BinarySearch(two_numbers_array, target_number)
self.assertEqual(-1, test_search.search_index_of_target_number())
def test_two_numbers_array_with_higher_target_number(self):
two_numbers_array = [1, 3]
higher_target_number = 3
test_search = BinarySearch(two_numbers_array, higher_target_number)
self.assertEqual(1, test_search.search_index_of_target_number())
def test_two_numbers_array_with_lower_target_number(self):
two_numbers_array = [1, 3]
lower_target_number = 1
test_search = BinarySearch(two_numbers_array, lower_target_number)
self.assertEqual(0, test_search.search_index_of_target_number())
def test_one_number_array_without_target_number(self):
one_number_array = [1]
target_number = 3
test_search = BinarySearch(one_number_array, target_number)
self.assertEqual(-1, test_search.search_index_of_target_number())