mirror of https://github.com/mahmoud/boltons.git
77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
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from pytest import raises
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from boltons.mathutils import clamp, ceil, floor
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import math
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INF, NAN = float('inf'), float('nan')
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OPTIONS = [1618, 1378, 166, 1521, 2347, 2016, 879, 2123,
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269.3, 1230, 66, 425.2, 250, 2399, 2314, 439,
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247, 208, 379, 1861]
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OPTIONS_SORTED = sorted(OPTIONS)
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OUT_OF_RANGE_LOWER = 60
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OUT_OF_RANGE_UPPER = 2500
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VALID_LOWER = 247
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VALID_UPPER = 2314
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VALID_BETWEEN = 248.5
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def test_clamp_examples():
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"""some examples for clamp()"""
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assert 0 == clamp(0, 0, 1) == clamp(-1, 0, 1)
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assert 0 == clamp(-1, lower=0)
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assert 1 == clamp(1, 0, 1) == clamp(5, 0, 1)
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assert 1 == clamp(5, upper=1)
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assert 0.5 == clamp(7, upper=0.5)
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assert 1 == clamp(7.7, upper=1)
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def test_clamp_transparent():
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"""clamp(x) should equal x because both limits are omitted"""
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assert clamp(0) == 0
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assert clamp(1) == 1
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assert clamp(10**100) == 10**100
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assert clamp(INF) == INF
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assert clamp(-INF) == -INF
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assert math.isnan(clamp(NAN))
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def test_ceil_basic():
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assert ceil(VALID_LOWER, OPTIONS) == VALID_LOWER
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assert ceil(VALID_UPPER, OPTIONS) == VALID_UPPER
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assert ceil(VALID_BETWEEN, OPTIONS) == 250
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def test_ceil_sorted():
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assert ceil(VALID_LOWER, OPTIONS) == ceil(VALID_LOWER, OPTIONS_SORTED)
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assert ceil(VALID_UPPER, OPTIONS) == ceil(VALID_UPPER, OPTIONS_SORTED)
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assert ceil(VALID_BETWEEN, OPTIONS) == ceil(VALID_BETWEEN, OPTIONS_SORTED)
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def test_ceil_oor_lower():
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assert min(OPTIONS) == ceil(OUT_OF_RANGE_LOWER, OPTIONS)
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def test_ceil_oor_upper():
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with raises(ValueError):
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ceil(OUT_OF_RANGE_UPPER, OPTIONS)
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def test_floor_basic():
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assert floor(VALID_LOWER, OPTIONS) == VALID_LOWER
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assert floor(VALID_UPPER, OPTIONS) == VALID_UPPER
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assert floor(VALID_LOWER, OPTIONS) == 247
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def test_floor_sorted():
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assert floor(VALID_LOWER, OPTIONS) == floor(VALID_LOWER, OPTIONS_SORTED)
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assert floor(VALID_UPPER, OPTIONS) == floor(VALID_UPPER, OPTIONS_SORTED)
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assert floor(VALID_BETWEEN, OPTIONS) == floor(VALID_BETWEEN, OPTIONS_SORTED)
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def test_floor_oor_upper():
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assert max(OPTIONS) == floor(OUT_OF_RANGE_UPPER, OPTIONS)
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def test_floor_oor_lower():
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with raises(ValueError):
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floor(OUT_OF_RANGE_LOWER, OPTIONS)
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