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| author | Charles Harris <charlesr.harris@gmail.com> | 2017-03-21 17:20:17 -0600 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-03-21 17:20:17 -0600 |
| commit | 88ef1a6ac0e8df043b044f0aa37bf4b2f18c237e (patch) | |
| tree | 193352aee3e8614e42b714af7fc7cc032a653bd3 /numpy/lib/tests/test_polynomial.py | |
| parent | 0dd7ca5d57f216d14f70c28694a15fb909ee645e (diff) | |
| parent | 3c4f17b7d6d44b3076be9d50e305ed71836fa5d9 (diff) | |
| download | numpy-88ef1a6ac0e8df043b044f0aa37bf4b2f18c237e.tar.gz | |
Merge pull request #8807 from eric-wieser/poly1d-fixes-fixes-fixes
TST: Prove that poly1d coeffs are immutable
Diffstat (limited to 'numpy/lib/tests/test_polynomial.py')
| -rw-r--r-- | numpy/lib/tests/test_polynomial.py | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/numpy/lib/tests/test_polynomial.py b/numpy/lib/tests/test_polynomial.py index f1e4543bb..0725c186d 100644 --- a/numpy/lib/tests/test_polynomial.py +++ b/numpy/lib/tests/test_polynomial.py @@ -222,6 +222,20 @@ class TestDocs(TestCase): assert_equal(p == p2, False) assert_equal(p != p2, True) + def test_poly_coeffs_immutable(self): + """ Coefficients should not 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[2] += 10 + assert_equal(p.coeffs, [1, 2, 3]) + if __name__ == "__main__": run_module_suite() |