public void Remove()
{
var provider = new MessagePackProvider();
var formatter = new Formatter(provider, MessagePackContext.Empty);
provider.Add(formatter);
Assert.AreEqual(1, provider.Formatters.Count);
Assert.True(provider.Formatters.ContainsKey(typeof(Target)));
Assert.True(provider.Formatters.ContainsValue(formatter));
provider.Remove <Target>();
Assert.AreEqual(0, provider.Formatters.Count);
Assert.False(provider.Formatters.ContainsKey(typeof(Target)));
Assert.False(provider.Formatters.ContainsValue(formatter));
}
