public void Should_be_able_to_clear_registry()
{
Policy policy = Policy.NoOp();
string key = Guid.NewGuid().ToString();
_registry.Add(key, policy);
_registry.Count.Should().Be(1);
Policy policy2 = Policy.NoOp();
string key2 = Guid.NewGuid().ToString();
_registry.Add(key2, policy2);
_registry.Count.Should().Be(2);
_registry.Clear();
_registry.Count.Should().Be(0);
}