Add tests for wraps

During testing I also discovered that `_ignores_kwargs` was also missing
the @wraps decorator. Now it has it.

salt/utils/decorators/__init__.py

@@ -643,6 +643,7 @@ def ignores_kwargs(*kwarg_names):
         List of argument names to ignore
     '''
     def _ignores_kwargs(fn):
+        @wraps(fn)
         def __ignores_kwargs(*args, **kwargs):
             kwargs_filtered = kwargs.copy()
             for name in kwarg_names:

tests/unit/utils/test_decorators.py

@@ -352,3 +352,39 @@ class DecoratorsTest(TestCase):
         depr._curr_version = self._mk_version("Helium")[1]
         with self.assertRaises(SaltConfigurationError):
             assert depr(self.new_function)() == self.new_function()
+
+    def test_with_depreciated_should_wrap_function(self):
+        def func(): pass
+
+        wrapped = decorators.with_deprecated({}, "Beryllium")(func)
+        assert wrapped.__module__ == func.__module__
+
+    def test_is_deprecated_should_wrap_function(self):
+        def func(): pass
+
+        wrapped = decorators.is_deprecated({}, "Beryllium")(func)
+        assert wrapped.__module__ == func.__module__
+
+    def test_ensure_unicode_args_should_wrap_function(self):
+        def func(): pass
+
+        wrapped = decorators.ensure_unicode_args(func)
+        assert wrapped.__module__ == func.__module__
+
+    def test_ignores_kwargs_should_wrap_function(self):
+        def func(): pass
+
+        wrapped = decorators.ignores_kwargs('foo', 'bar')(func)
+        assert wrapped.__module__ == func.__module__
+
+    def test_memoize_should_wrap_function(self):
+        def func(): pass
+
+        wrapped = decorators.memoize(func)
+        assert wrapped.__module__ == func.__module__
+
+    def timing_should_wrap_function(self):
+        def func(): pass
+            
+        wrapped = decorators.timing(func)
+        assert wrapped.__module__ == func.__module__