| import pytest |
| from solution import merge, total_length, contains, gaps, validate |
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| def test_merge_overlapping_and_adjacent(): |
| assert merge([(5, 7), (1, 3), (2, 4), (8, 9)]) == [(1, 9)] |
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| def test_merge_disjoint_sorted(): |
| assert merge([(10, 12), (1, 2)]) == [(1, 2), (10, 12)] |
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| def test_merge_empty(): |
| assert merge([]) == [] |
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| def test_validate_rejects_reversed_and_wrong_size(): |
| with pytest.raises(ValueError): |
| validate((3, 1)) |
| with pytest.raises(ValueError): |
| validate((1, 2, 3)) |
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| def test_total_length_counts_integers(): |
| assert total_length([(1, 3), (2, 5), (10, 10)]) == 6 |
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| @pytest.mark.parametrize("x,expected", [(1, True), (4, True), (6, False), (0, False), (11, True), (20, False)]) |
| def test_contains(x, expected): |
| assert contains([(1, 4), (8, 12)], x) is expected |
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| def test_gaps_inside_bounds(): |
| assert gaps([(3, 4), (7, 8)], 1, 10) == [(1, 2), (5, 6), (9, 10)] |
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| def test_gaps_ignores_outside_and_full_cover(): |
| assert gaps([(-5, -1), (20, 30)], 0, 2) == [(0, 2)] |
| assert gaps([(0, 10)], 0, 10) == [] |
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| def test_gaps_single_point_at_upper(): |
| assert gaps([(0, 9)], 0, 10) == [(10, 10)] |
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| def test_gaps_invalid_bounds(): |
| with pytest.raises(ValueError): |
| gaps([], 5, 1) |
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