diff options
Diffstat (limited to 'numpy/lib/tests/test_function_base.py')
| -rw-r--r-- | numpy/lib/tests/test_function_base.py | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/numpy/lib/tests/test_function_base.py b/numpy/lib/tests/test_function_base.py index f6d4b6111..2f766471f 100644 --- a/numpy/lib/tests/test_function_base.py +++ b/numpy/lib/tests/test_function_base.py @@ -926,6 +926,12 @@ class TestGradient(TestCase): assert_array_equal(gradient(x), dx) assert_(dx.dtype == np.dtype('timedelta64[D]')) + def test_inexact_dtypes(self): + for dt in [np.float16, np.float32, np.float64]: + # dtypes should not be promoted in a different way to what diff does + x = np.array([1, 2, 3], dtype=dt) + assert_equal(gradient(x).dtype, np.diff(x).dtype) + def test_values(self): # needs at least 2 points for edge_order ==1 gradient(np.arange(2), edge_order=1) |