82 lines
1.4 KiB
Python
82 lines
1.4 KiB
Python
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import sys
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import pytest
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import kmath.rat as rat
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def test_add():
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r1 = rat.Rational(1, 1)
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r2 = rat.Int(3)
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r3 = r1 + r2
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assert r3.n == 4
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assert r3.d == 1
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assert float(r3) == 4.0
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assert int(r3) == 4
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def test_mul():
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r1 = rat.Rational(1, 2)
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r2 = rat.Rational(1, 8)
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r3 = rat.Rational(1, 16)
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assert r1 * r2 == r3
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def test_div():
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r1 = rat.Rational(1, 2)
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r2 = rat.Rational(1, 8)
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r3 = rat.Int(4)
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assert r1 / r2 == r3
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def test_pow():
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r1 = rat.Rational(1, 2)
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r2 = rat.Rational(3, 4)
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r3 = rat.Rational(1, 4)
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r4 = rat.Rational(9, 16)
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r5 = rat.Rational(1, 8)
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assert r1 ** 2 == r3
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assert r2 ** 2 == r4
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assert rat.ipow(r1, 3) == r5
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def test_scale():
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r1 = rat.Rational(1, 2)
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r2 = rat.Rational(2, 4)
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assert r1.scale(2) == r2
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assert r1.scale(2).reduce() == r1
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def test_dbz_protection():
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assert rat.Rational(0, 0) == rat.Rational(1, 0)
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def test_equality():
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r1 = rat.Rational(1, 2)
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r2 = rat.Rational(3, 4)
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r3 = rat.Rational(2, 4)
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assert r1 < r2
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assert r3 < r2
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assert r1 <= r3
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assert r1 == r3
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assert r2 > r1
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assert r2 >= r3
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def test_sub():
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r1 = rat.Rational(1, 2)
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r2 = rat.Rational(1, 8)
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r3 = rat.Rational(3, 8)
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assert r1 - r2 == r3
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def test_recurse():
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"""test from the calculus course"""
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r = rat.Rational(239, 169)
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assert rat.recurse(5) == r
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if __name__ == '__main__':
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sys.exit(pytest.main(["-qq"]))
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