public void Default_nullability_of_property_is_based_on_nullability_of_CLR_type_and_property_being_part_of_primary_key()
{
var entityType = new Model().AddEntityType(typeof(object));
var stringProperty = entityType.AddProperty("stringName", typeof(string));
var nullableIntProperty = entityType.AddProperty("nullableIntName", typeof(int?));
var intProperty = entityType.AddProperty("intName", typeof(int));
Assert.Null(stringProperty.IsNullable);
Assert.True(((IProperty)stringProperty).IsNullable);
Assert.Null(stringProperty.IsNullable);
Assert.True(((IProperty)nullableIntProperty).IsNullable);
Assert.Null(intProperty.IsNullable);
Assert.False(((IProperty)intProperty).IsNullable);
entityType.SetPrimaryKey(stringProperty);
Assert.Null(stringProperty.IsNullable);
Assert.False(((IProperty)stringProperty).IsNullable);
}