def test_cache_csr():
x = sparse.random((10, 5), density=0.5).todense()
s = COO(x, cache=True)
assert isinstance(s.tocsr(), scipy.sparse.csr_matrix)
assert isinstance(s.tocsc(), scipy.sparse.csc_matrix)
assert s.tocsr() is s.tocsr()
assert s.tocsc() is s.tocsc()
def test_cache_csr(x):
x = x.todense()
s = COO(x, cache=True)
assert isinstance(s.tocsr(), scipy.sparse.csr_matrix)
assert isinstance(s.tocsc(), scipy.sparse.csc_matrix)
assert s.tocsr() is s.tocsr()
assert s.tocsc() is s.tocsc()
