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79 lines
2.0 KiB
Python
79 lines
2.0 KiB
Python
from __future__ import absolute_import
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from .union_find import UnionFind
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import unittest
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class TestUnionFind(unittest.TestCase):
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def test_init_with_valid_size(self):
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uf = UnionFind(5)
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self.assertEqual(uf.size, 5)
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def test_init_with_invalid_size(self):
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with self.assertRaises(ValueError):
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uf = UnionFind(0)
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with self.assertRaises(ValueError):
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uf = UnionFind(-5)
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def test_union_with_valid_values(self):
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uf = UnionFind(10)
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for i in range(11):
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for j in range(11):
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uf.union(i, j)
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def test_union_with_invalid_values(self):
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uf = UnionFind(10)
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with self.assertRaises(ValueError):
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uf.union(-1, 1)
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with self.assertRaises(ValueError):
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uf.union(11, 1)
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def test_same_set_with_valid_values(self):
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uf = UnionFind(10)
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for i in range(11):
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for j in range(11):
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if i == j:
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self.assertTrue(uf.same_set(i, j))
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else:
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self.assertFalse(uf.same_set(i, j))
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uf.union(1, 2)
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self.assertTrue(uf.same_set(1, 2))
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uf.union(3, 4)
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self.assertTrue(uf.same_set(3, 4))
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self.assertFalse(uf.same_set(1, 3))
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self.assertFalse(uf.same_set(1, 4))
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self.assertFalse(uf.same_set(2, 3))
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self.assertFalse(uf.same_set(2, 4))
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uf.union(1, 3)
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self.assertTrue(uf.same_set(1, 3))
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self.assertTrue(uf.same_set(1, 4))
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self.assertTrue(uf.same_set(2, 3))
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self.assertTrue(uf.same_set(2, 4))
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uf.union(4, 10)
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self.assertTrue(uf.same_set(1, 10))
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self.assertTrue(uf.same_set(2, 10))
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self.assertTrue(uf.same_set(3, 10))
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self.assertTrue(uf.same_set(4, 10))
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def test_same_set_with_invalid_values(self):
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uf = UnionFind(10)
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with self.assertRaises(ValueError):
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uf.same_set(-1, 1)
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with self.assertRaises(ValueError):
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uf.same_set(11, 0)
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if __name__ == '__main__':
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unittest.main()
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