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test_array.py
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313 lines (225 loc) · 10.8 KB
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from algorithms.arrays import (
delete_nth, delete_nth_naive,
flatten_iter, flatten,
garage,
josephus,
longest_non_repeat_v1, longest_non_repeat_v2,
Interval, merge_intervals,
missing_ranges,
move_zeros,
plus_one_v1, plus_one_v2, plus_one_v3,
rotate_v1, rotate_v2, rotate_v3,
summarize_ranges,
three_sum,
two_sum,
max_ones_index
)
import unittest
class TestJosephus(unittest.TestCase):
def test_josephus(self):
a = ['1', '2', '3', '4', '5', '6', '7', '8', '9']
josephus_generator = josephus(a, 3)
self.assertEqual(next(josephus_generator), '3')
self.assertEqual(next(josephus_generator), '6')
self.assertEqual(next(josephus_generator), '9')
self.assertEqual(next(josephus_generator), '4')
self.assertEqual(next(josephus_generator), '8')
self.assertEqual(next(josephus_generator), '5')
self.assertEqual(next(josephus_generator), '2')
self.assertEqual(next(josephus_generator), '7')
self.assertEqual(next(josephus_generator), '1')
self.assertRaises(StopIteration, next, josephus_generator)
class TestDeleteNth(unittest.TestCase):
def test_delete_nth_naive(self):
self.assertListEqual(delete_nth_naive(
[20, 37, 20, 21, 37, 21, 21], n=1),
[20, 37, 21])
self.assertListEqual(delete_nth_naive(
[1, 1, 3, 3, 7, 2, 2, 2, 2], n=3),
[1, 1, 3, 3, 7, 2, 2, 2])
self.assertListEqual(delete_nth_naive(
[1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3),
[1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5])
self.assertListEqual(delete_nth_naive([], n=5),
[])
self.assertListEqual(delete_nth_naive(
[1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0),
[])
def test_delete_nth(self):
self.assertListEqual(delete_nth([20, 37, 20, 21, 37, 21, 21], n=1),
[20, 37, 21])
self.assertListEqual(delete_nth([1, 1, 3, 3, 7, 2, 2, 2, 2], n=3),
[1, 1, 3, 3, 7, 2, 2, 2])
self.assertListEqual(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=3),
[1, 2, 3, 1, 1, 2, 2, 3, 3, 4, 5])
self.assertListEqual(delete_nth([], n=5),
[])
self.assertListEqual(delete_nth([1, 2, 3, 1, 1, 2, 1, 2, 3, 3, 2, 4, 5, 3, 1], n=0),
[])
class TestFlatten(unittest.TestCase):
def test_flatten(self):
nested_list = [2, 1, [3, [4, 5], 6], 7, [8]]
flattened = flatten(nested_list)
self.assertEqual(flattened, [2, 1, 3, 4, 5, 6, 7, 8])
nested_list = [[3, [4, 5], 6], 7, [8]]
flattened = flatten(nested_list)
self.assertEqual(flattened, [3, 4, 5, 6, 7, 8])
nested_list = [[], [8]]
flattened = flatten(nested_list)
self.assertEqual(flattened, [8])
def test_flatten_iter(self):
nested_list = [2, 1, [3, [4, 5], 6], 7, [8]]
flattened = flatten_iter(nested_list)
self.assertEqual(next(flattened), 2)
self.assertEqual(next(flattened), 1)
self.assertEqual(next(flattened), 3)
self.assertEqual(next(flattened), 4)
self.assertEqual(next(flattened), 5)
self.assertEqual(next(flattened), 6)
self.assertEqual(next(flattened), 7)
self.assertEqual(next(flattened), 8)
self.assertRaises(StopIteration, next, flattened)
nested_list = [[3, [4, 5], 6], 7, [8]]
flattened = flatten_iter(nested_list)
self.assertEqual(next(flattened), 3)
self.assertEqual(next(flattened), 4)
self.assertEqual(next(flattened), 5)
self.assertEqual(next(flattened), 6)
self.assertEqual(next(flattened), 7)
self.assertEqual(next(flattened), 8)
self.assertRaises(StopIteration, next, flattened)
nested_list = [[], [8]]
flattened = flatten_iter(nested_list)
self.assertEqual(next(flattened), 8)
self.assertRaises(StopIteration, next, flattened)
class TestGarage(unittest.TestCase):
def test_garage(self):
initial = [1, 2, 3, 0, 4]
final = [0, 3, 2, 1, 4]
steps, seq = garage(initial, final)
self.assertEqual(steps, 4)
self.assertListEqual(seq, [[0, 2, 3, 1, 4],
[2, 0, 3, 1, 4],
[2, 3, 0, 1, 4],
[0, 3, 2, 1, 4]])
class TestLongestNonRepeat(unittest.TestCase):
def test_longest_non_repeat_v1(self):
string = "abcabcbb"
self.assertEqual(longest_non_repeat_v1(string), 3)
string = "bbbbb"
self.assertEqual(longest_non_repeat_v1(string), 1)
string = "pwwkew"
self.assertEqual(longest_non_repeat_v1(string), 3)
def test_longest_non_repeat_v2(self):
string = "abcabcbb"
self.assertEqual(longest_non_repeat_v2(string), 3)
string = "bbbbb"
self.assertEqual(longest_non_repeat_v2(string), 1)
string = "pwwkew"
self.assertEqual(longest_non_repeat_v2(string), 3)
class TestMaxOnesIndex(unittest.TestCase):
def test_max_ones_index(self):
self.assertEqual(9, max_ones_index([1, 1, 0, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1]))
self.assertEqual(3, max_ones_index([1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1]))
self.assertEqual(-1, max_ones_index([1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]))
class TestMergeInterval(unittest.TestCase):
def test_merge(self):
interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]]
intervals = [Interval(i[0], i[1]) for i in interval_list]
merged_intervals = Interval.merge(intervals)
self.assertEqual(
merged_intervals,
[Interval(1, 6), Interval(8, 10), Interval(15, 18)]
)
def test_merge_intervals(self):
interval_list = [[1, 3], [2, 6], [8, 10], [15, 18]]
merged_intervals = merge_intervals(interval_list)
self.assertEqual(
merged_intervals,
[[1, 6], [8, 10], [15, 18]]
)
class TestMissingRanges(unittest.TestCase):
def test_missing_ranges(self):
arr = [3, 5, 10, 11, 12, 15, 19]
self.assertListEqual(missing_ranges(arr, 0, 20),
[(0, 2), (4, 4), (6, 9),
(13, 14), (16, 18), (20, 20)])
self.assertListEqual(missing_ranges(arr, 6, 100),
[(6, 9), (13, 14), (16, 18), (20, 100)])
class TestMoveZeros(unittest.TestCase):
def test_move_zeros(self):
self.assertListEqual(move_zeros([False, 1, 0, 1, 2, 0, 1, 3, "a"]),
[False, 1, 1, 2, 1, 3, "a", 0, 0])
self.assertListEqual(move_zeros([0, 34, 'rahul', [], None, 0, True, 0]),
[34, 'rahul', [], None, True, 0, 0, 0])
class TestPlusOne(unittest.TestCase):
def test_plus_one_v1(self):
self.assertListEqual(plus_one_v1([0]), [1])
self.assertListEqual(plus_one_v1([9]), [1, 0])
self.assertListEqual(plus_one_v1([1, 0, 9]), [1, 1, 0])
self.assertListEqual(plus_one_v1([9, 9, 8, 0, 0, 9]),
[9, 9, 8, 0, 1, 0])
self.assertListEqual(plus_one_v1([9, 9, 9, 9]),
[1, 0, 0, 0, 0])
def test_plus_one_v2(self):
self.assertListEqual(plus_one_v2([0]), [1])
self.assertListEqual(plus_one_v2([9]), [1, 0])
self.assertListEqual(plus_one_v2([1, 0, 9]), [1, 1, 0])
self.assertListEqual(plus_one_v2([9, 9, 8, 0, 0, 9]),
[9, 9, 8, 0, 1, 0])
self.assertListEqual(plus_one_v2([9, 9, 9, 9]),
[1, 0, 0, 0, 0])
def test_plus_one_v3(self):
self.assertListEqual(plus_one_v3([0]), [1])
self.assertListEqual(plus_one_v3([9]), [1, 0])
self.assertListEqual(plus_one_v3([1, 0, 9]), [1, 1, 0])
self.assertListEqual(plus_one_v3([9, 9, 8, 0, 0, 9]),
[9, 9, 8, 0, 1, 0])
self.assertListEqual(plus_one_v3([9, 9, 9, 9]),
[1, 0, 0, 0, 0])
class TestRotateArray(unittest.TestCase):
def test_rotate_v1(self):
self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=3),
[5, 6, 7, 1, 2, 3, 4])
self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=1),
[7, 1, 2, 3, 4, 5, 6])
self.assertListEqual(rotate_v1([1, 2, 3, 4, 5, 6, 7], k=7),
[1, 2, 3, 4, 5, 6, 7])
self.assertListEqual(rotate_v1([1, 2], k=111), [2, 1])
def test_rotate_v2(self):
self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=3),
[5, 6, 7, 1, 2, 3, 4])
self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=1),
[7, 1, 2, 3, 4, 5, 6])
self.assertListEqual(rotate_v2([1, 2, 3, 4, 5, 6, 7], k=7),
[1, 2, 3, 4, 5, 6, 7])
self.assertListEqual(rotate_v2([1, 2], k=111), [2, 1])
def test_rotate_v3(self):
self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=3),
[5, 6, 7, 1, 2, 3, 4])
self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=1),
[7, 1, 2, 3, 4, 5, 6])
self.assertListEqual(rotate_v3([1, 2, 3, 4, 5, 6, 7], k=7),
[1, 2, 3, 4, 5, 6, 7])
self.assertListEqual(rotate_v3([1, 2], k=111), [2, 1])
class TestSummaryRanges(unittest.TestCase):
def test_summarize_ranges(self):
self.assertListEqual(summarize_ranges([0, 1, 2, 4, 5, 7]),
[(0, 2), (4, 5), (7, 7)])
self.assertListEqual(summarize_ranges([-5, -4, -3, 1, 2, 4, 5, 6]),
[(-5, -3), (1, 2), (4, 6)])
self.assertListEqual(summarize_ranges([-2, -1, 0, 1, 2]),
[(-2, 2)])
class TestThreeSum(unittest.TestCase):
def test_three_sum(self):
self.assertSetEqual(three_sum([-1, 0, 1, 2, -1, -4]),
{(-1, 0, 1), (-1, -1, 2)})
self.assertSetEqual(three_sum([-1, 3, 1, 2, -1, -4, -2]),
{(-4, 1, 3), (-2, -1, 3), (-1, -1, 2)})
class TestSuite(unittest.TestCase):
def test_two_sum(self):
self.assertTupleEqual((0, 2), two_sum([2, 11, 7, 9], target=9))
self.assertTupleEqual((0, 3), two_sum([-3, 5, 2, 3, 8, -9], target=0))
self.assertIsNone(two_sum([-3, 5, 2, 3, 8, -9], target=6))
if __name__ == '__main__':
unittest.main()