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-rw-r--r--numpy/lib/tests/test_polynomial.py18
1 files changed, 9 insertions, 9 deletions
diff --git a/numpy/lib/tests/test_polynomial.py b/numpy/lib/tests/test_polynomial.py
index 0725c186d..2aed5c924 100644
--- a/numpy/lib/tests/test_polynomial.py
+++ b/numpy/lib/tests/test_polynomial.py
@@ -222,19 +222,19 @@ class TestDocs(TestCase):
assert_equal(p == p2, False)
assert_equal(p != p2, True)
- def test_poly_coeffs_immutable(self):
- """ Coefficients should not be modifiable """
+ def test_poly_coeffs_mutable(self):
+ """ Coefficients should be modifiable """
p = np.poly1d([1, 2, 3])
- try:
- # despite throwing an exception, this used to change state
- p.coeffs += 1
- except Exception:
- pass
- assert_equal(p.coeffs, [1, 2, 3])
+ p.coeffs += 1
+ assert_equal(p.coeffs, [2, 3, 4])
p.coeffs[2] += 10
- assert_equal(p.coeffs, [1, 2, 3])
+ assert_equal(p.coeffs, [2, 3, 14])
+
+ # this never used to be allowed - let's not add features to deprecated
+ # APIs
+ assert_raises(AttributeError, setattr, p, 'coeffs', np.array(1))
if __name__ == "__main__":