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limit the range in symmetric_matrices #325

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Dec 4, 2024
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limit the range in symmetric_matrices #325

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10 changes: 8 additions & 2 deletions array_api_tests/hypothesis_helpers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -370,17 +370,23 @@ def mutually_broadcastable_shapes(
# TODO: Add support for complex Hermitian matrices
@composite
def symmetric_matrices(draw, dtypes=real_floating_dtypes, finite=True, bound=10.):
# for now, only generate elements from (1, bound); TODO: restore
# generating from (-bound, -1/bound).or.(1/bound, bound)
# Note that using `assume` triggers a HealthCheck for filtering too much.
shape = draw(square_matrix_shapes)
dtype = draw(dtypes)
if not isinstance(finite, bool):
finite = draw(finite)
elements = {'allow_nan': False, 'allow_infinity': False} if finite else None
if finite:
elements = {'allow_nan': False, 'allow_infinity': False,
'min_value': 1, 'max_value': bound}
else:
elements = None
a = draw(arrays(dtype=dtype, shape=shape, elements=elements))
at = ah._matrix_transpose(a)
H = (a + at)*0.5
if finite:
assume(not xp.any(xp.isinf(H)))
assume(xp.all((H == 0.) | ((1/bound <= xp.abs(H)) & (xp.abs(H) <= bound))))
return H

@composite
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