How can I unit test Entity Framework Code First Mappings?

I'm using Code First to map classes to an existing database. I need a way to unit test these mappings, which are a mix of convention-based, attribute-based, and fluent-api.

To unit test, I need to confirm that properties of the classes map to the correct table and column names in the database. This test needs to be performed against the context, and should cover all configuration options for code first.

At a very high level, I'd be looking to assert something like (pseudo-code):

Assert.IsTrue(context.TableFor<Widget>().IsNamed("tbl_Widget"));
Assert.IsTrue(context.ColumnFor<Widget>(w => w.Property).IsNamed("WidgetProperty"));