Add tests to ensure associations are setup correctly

test/integration/all_data_files_import_test.rb

@@ -79,4 +79,64 @@ def before_all
       assert_predicate category, :valid?
     end
   end
+
+  test "Category ↔ Attribute relationships are consistent with categories/*.yml" do
+    @raw_verticals_data.flatten.each do |raw_category|
+      real_category = Category.find(raw_category.fetch("id"))
+      raw_category.fetch("attributes").each do |friendly_id|
+        real_attribute = Property.find_by(friendly_id:)
+        assert_includes real_category.properties, real_attribute
+      end
+    end
+  end
+
+  test "Attribute ↔ Value relationships are consistent with attributes.yml" do
+    Property.all.each do |attribute|
+      raw_attribute = @raw_attributes_data.find { _1.fetch("id") == attribute.id }
+      raw_values = raw_attribute.fetch("values")
+      real_values = attribute.property_values
+
+      assert_equal raw_values.size, real_values.size
+      raw_values.each do |raw_value|
+        real_value = real_values.find { _1.id == raw_value.fetch("id") }
+        assert_equal Serializers::Data::PropertyValueSerializer.deserialize(raw_value), real_value
+      end
+    end
+  end
+
+  # more fragile, but easier sanity check
+  test "Snowboards category <sg-4-17-2-17> is fully imported and modeled correctly" do
+    snowboard_id = "sg-4-17-2-17"
+    raw_snowboard_category = @raw_verticals_data.flatten.find { _1.fetch("id") == snowboard_id }
+    snowboard_category = Category.find(snowboard_id)
+
+    assert_equal raw_snowboard_category.fetch("name"), snowboard_category.name
+    assert_empty snowboard_category.children
+
+    raw_snowboard_attributes = raw_snowboard_category.fetch("attributes").sort
+    assert_equal raw_snowboard_attributes.size, snowboard_category.properties.size
+    raw_snowboard_attributes
+      .zip(snowboard_category.properties.reorder(:friendly_id))
+      .each do |friendly_id, property|
+        assert_equal friendly_id, property.friendly_id
+      end
+  end
+
+  # more fragile, but easier sanity check
+  test "Color attribute <1> is fully imported and modeled correctly" do
+    color_id = 1"
+    raw_color_attribute = @raw_attributes_data.find { _1.fetch("id") == color_id }
+    color_attribute = Property.find(color_id)
+
+    assert_equal raw_color_attribute.fetch("name"), color_attribute.name
+
+    raw_color_values = raw_color_attribute.fetch("values").sort_by { _1.fetch("id") }
+    assert_equal raw_color_values.size, color_attribute.property_values.size
+    raw_color_values
+      .zip(color_attribute.property_values.reorder(:id))
+      .each do |raw_value, value|
+        assert_equal raw_value.fetch("id"), value.id
+        assert_equal raw_value.fetch("name"), value.name
+      end
+  end
 end