numpy.testing.assert_warns

numpy.testing.assert_warns(warning_class, *args, **kwargs)

Fail unless the given callable throws the specified warning.

A warning of class warning_class should be thrown by the callable when invoked with arguments args and keyword arguments kwargs. If a different type of warning is thrown, it will not be caught.

If called with all arguments other than the warning class omitted, may be used as a context manager:

with assert_warns(SomeWarning):

do_something()

The ability to be used as a context manager is new in NumPy v1.11.0.

New in version 1.4.0.

Parameters:

warning_class : class

The class defining the warning that func is expected to throw.

func : callable

The callable to test.

*args : Arguments

Arguments passed to func.

**kwargs : Kwargs

Keyword arguments passed to func.

Returns:

The value returned by func.