63 lines
1.7 KiB
Python
63 lines
1.7 KiB
Python
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from sympy.multipledispatch.conflict import (supercedes, ordering, ambiguities,
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ambiguous, super_signature, consistent)
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class A: pass
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class B(A): pass
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class C: pass
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def test_supercedes():
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assert supercedes([B], [A])
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assert supercedes([B, A], [A, A])
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assert not supercedes([B, A], [A, B])
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assert not supercedes([A], [B])
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def test_consistent():
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assert consistent([A], [A])
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assert consistent([B], [B])
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assert not consistent([A], [C])
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assert consistent([A, B], [A, B])
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assert consistent([B, A], [A, B])
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assert not consistent([B, A], [B])
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assert not consistent([B, A], [B, C])
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def test_super_signature():
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assert super_signature([[A]]) == [A]
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assert super_signature([[A], [B]]) == [B]
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assert super_signature([[A, B], [B, A]]) == [B, B]
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assert super_signature([[A, A, B], [A, B, A], [B, A, A]]) == [B, B, B]
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def test_ambiguous():
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assert not ambiguous([A], [A])
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assert not ambiguous([A], [B])
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assert not ambiguous([B], [B])
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assert not ambiguous([A, B], [B, B])
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assert ambiguous([A, B], [B, A])
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def test_ambiguities():
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signatures = [[A], [B], [A, B], [B, A], [A, C]]
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expected = {((A, B), (B, A))}
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result = ambiguities(signatures)
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assert set(map(frozenset, expected)) == set(map(frozenset, result))
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signatures = [[A], [B], [A, B], [B, A], [A, C], [B, B]]
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expected = set()
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result = ambiguities(signatures)
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assert set(map(frozenset, expected)) == set(map(frozenset, result))
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def test_ordering():
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signatures = [[A, A], [A, B], [B, A], [B, B], [A, C]]
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ord = ordering(signatures)
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assert ord[0] == (B, B) or ord[0] == (A, C)
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assert ord[-1] == (A, A) or ord[-1] == (A, C)
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def test_type_mro():
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assert super_signature([[object], [type]]) == [type]
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