public void Can_remove_keys()
{
var entityType = new EntityType(typeof(Customer), new Model());
var idProperty = entityType.GetOrAddProperty(Customer.IdProperty);
var nameProperty = entityType.GetOrAddProperty(Customer.NameProperty);
Assert.Equal(
Strings.KeyNotFound("{'" + idProperty.Name + "', '" + nameProperty.Name + "'}", typeof(Customer).FullName),
Assert.Throws<ModelItemNotFoundException>(() => entityType.GetKey(new[] { idProperty, nameProperty })).Message);
Assert.Null(entityType.RemoveKey(new Key(new[] { idProperty })));
var key1 = entityType.GetOrSetPrimaryKey(new[] { idProperty, nameProperty });
var key2 = entityType.GetOrAddKey(idProperty);
Assert.Equal(new[] { key2, key1 }, entityType.Keys.ToArray());
Assert.Same(key1, entityType.RemoveKey(key1));
Assert.Null(entityType.RemoveKey(key1));
Assert.Equal(
Strings.KeyNotFound("{'" + idProperty.Name + "', '" + nameProperty.Name + "'}", typeof(Customer).FullName),
Assert.Throws<ModelItemNotFoundException>(() => entityType.GetKey(new[] { idProperty, nameProperty })).Message);
Assert.Equal(new[] { key2 }, entityType.Keys.ToArray());
Assert.Same(key2, entityType.RemoveKey(new Key(new[] { idProperty })));
Assert.Empty(entityType.Keys);
}