48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
import unittest
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from binary_search import binary_search
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class BinarySearchTests(unittest.TestCase):
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def test_finds_value_in_array_with_one_element(self):
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self.assertEqual(binary_search([6], 6), 0)
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def test_finds_value_in_middle_of_array(self):
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self.assertEqual(binary_search([1, 3, 4, 6, 8, 9, 11], 6), 3)
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def test_finds_value_at_beginning_of_array(self):
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self.assertEqual(binary_search([1, 3, 4, 6, 8, 9, 11], 1), 0)
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def test_finds_value_at_end_of_array(self):
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self.assertEqual(binary_search([1, 3, 4, 6, 8, 9, 11], 11), 6)
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def test_finds_value_in_array_of_odd_length(self):
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self.assertEqual(
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binary_search([1, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 634],
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144), 9)
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def test_finds_value_in_array_of_even_length(self):
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self.assertEqual(
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binary_search([1, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377], 21),
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5)
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def test_identifies_value_missing(self):
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with self.assertRaises(ValueError):
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binary_search([1, 3, 4, 6, 8, 9, 11], 7)
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def test_value_smaller_than_arrays_minimum(self):
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with self.assertRaises(ValueError):
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binary_search([1, 3, 4, 6, 8, 9, 11], 0)
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def test_value_larger_than_arrays_maximum(self):
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with self.assertRaises(ValueError):
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binary_search([1, 3, 4, 6, 8, 9, 11], 13)
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def test_empty_array(self):
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with self.assertRaises(ValueError):
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binary_search([], 1)
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if __name__ == '__main__':
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unittest.main()
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