add a spec

spec/integration/has_many_spec.rb

@@ -0,0 +1,19 @@
+require 'spec_helper'
+
+class HasManySpec
+  class AObject < ActiveType::Object
+    attribute :id, :string
+    attribute :a_name, :string
+    has_many :b_objects, class_name: "BObject"
+  end
+
+  class BObject < ActiveType::Object
+    attribute :b_name, :string
+  end
+end
+
+describe HasManySpec::AObject do
+  it 'does not crash' do
+    expect(HasManySpec::AObject.new(id: 'test_a', b_objects: [HasManySpec::BObject.new(b_name: 'test_b')]).id).to eq('test_a')
+  end
+end