48 lines
1.1 KiB
Python
48 lines
1.1 KiB
Python
# test math.isclose (appeared in Python 3.5)
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try:
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from math import isclose
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except ImportError:
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print("SKIP")
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raise SystemExit
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def test(a, b, **kwargs):
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print(isclose(a, b, **kwargs))
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def test_combinations(a, b, **kwargs):
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test(a, a, **kwargs)
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test(a, b, **kwargs)
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test(b, a, **kwargs)
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test(b, b, **kwargs)
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# Special numbers
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test_combinations(float('nan'), 1)
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test_combinations(float('inf'), 1)
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test_combinations(float('-inf'), 1)
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# Equality
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test(1.0, 1.0, rel_tol=0.0, abs_tol=0.0)
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test(2.35e-100, 2.35e-100, rel_tol=0.0, abs_tol=0.0)
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test(2.1234e100, 2.1234e100, rel_tol=0.0, abs_tol=0.0)
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# Relative tolerance
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test(1000.0, 1001.0, rel_tol=1e-3)
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test(1000.0, 1001.0, rel_tol=1e-4)
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test(1000, 1001, rel_tol=1e-3)
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test(1000, 1001, rel_tol=1e-4)
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test_combinations(0, 1, rel_tol=1.0)
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# Absolute tolerance
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test(0.0, 1e-10, abs_tol=1e-10, rel_tol=0.1)
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test(0.0, 1e-10, abs_tol=0.0, rel_tol=0.1)
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# Bad parameters
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try:
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isclose(0, 0, abs_tol=-1)
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except ValueError:
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print('ValueError')
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try:
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isclose(0, 0, rel_tol=-1)
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except ValueError:
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print('ValueError')
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