Get optional props from validated object

This is much easier and safer than "guessing" the class name based on
the validator name. That can cause a problem when another class with the
same name is found. The "guessing" was only added because we used
OpenStruct in the tests, but we shouldn't change the code only to make
tests run. I changed the tests to use the real entities, with
auto-validation disabled in the constructor, so we can test the
validator manually.

lib/diaspora_federation/test/factories.rb

@@ -41,7 +41,7 @@ module DiasporaFederation
 
       Fabricator(:account_migration_entity, class_name: DiasporaFederation::Entities::AccountMigration) do
         author { Fabricate.sequence(:diaspora_id) }
-        profile { Fabricate(:profile_entity) }
+        profile {|attrs| Fabricate(:profile_entity, author: attrs[:author]) }
         old_identity { Fabricate.sequence(:diaspora_id) }
       end
 

lib/diaspora_federation/validators/optional_aware_validator.rb

@@ -13,10 +13,8 @@ module DiasporaFederation
       private
 
       def optional_props
-        entity_name = self.class.name.split("::").last.sub("Validator", "")
-        return [] unless Entities.const_defined?(entity_name)
-
-        Entities.const_get(entity_name).optional_props
+        return [] unless @obj.class.respond_to?(:optional_props)
+        @obj.class.optional_props
       end
     end
   end

spec/lib/diaspora_federation/validators/optional_aware_validator_spec.rb

@@ -1,47 +1,46 @@
 module DiasporaFederation
   describe Validators::OptionalAwareValidator do
-    let(:entity_data) {
-      {test1: "abc", test2: true, test7: "abc", multi: []}
-    }
+    def entity_stub(additional_data={})
+      allow_any_instance_of(Entities::TestComplexEntity).to receive(:freeze)
+      allow_any_instance_of(Entities::TestComplexEntity).to receive(:validate)
+      entity_data = {test1: "abc", test2: true, test3: nil, test4: nil, test5: nil, test6: nil, test7: "abc", multi: []}
+      Entities::TestComplexEntity.new(entity_data.merge(additional_data))
+    end
 
     it "validates a valid object" do
-      validator = Validators::TestComplexEntityValidator.new(OpenStruct.new(entity_data))
+      validator = Validators::TestComplexEntityValidator.new(entity_stub)
       expect(validator).to be_valid
       expect(validator.errors).to be_empty
     end
 
     it "fails when a mandatory property is invalid" do
       ["ab", nil].each do |val|
-        entity = OpenStruct.new(entity_data.merge(test1: val))
-        validator = Validators::TestComplexEntityValidator.new(entity)
+        validator = Validators::TestComplexEntityValidator.new(entity_stub(test1: val))
         expect(validator).not_to be_valid
         expect(validator.errors).to include(:test1)
       end
     end
 
     it "fails when an optional property is invalid" do
-      entity = OpenStruct.new(entity_data.merge(test7: "ab"))
-      validator = Validators::TestComplexEntityValidator.new(entity)
+      validator = Validators::TestComplexEntityValidator.new(entity_stub(test7: "ab"))
       expect(validator).not_to be_valid
       expect(validator.errors).to include(:test7)
     end
 
     it "allows an optional property to be nil" do
-      entity = OpenStruct.new(entity_data.merge(test7: nil))
-      validator = Validators::TestComplexEntityValidator.new(entity)
+      validator = Validators::TestComplexEntityValidator.new(entity_stub(test7: nil))
       expect(validator).to be_valid
       expect(validator.errors).to be_empty
     end
 
     it "doesn't ignore 'not_nil' rules for an optional property" do
-      entity = OpenStruct.new(entity_data.merge(multi: nil))
-      validator = Validators::TestComplexEntityValidator.new(entity)
+      validator = Validators::TestComplexEntityValidator.new(entity_stub(multi: nil))
       expect(validator).not_to be_valid
       expect(validator.errors).to include(:multi)
     end
 
-    it "doesn't fail when there is no entity for this validator" do
-      entity = OpenStruct.new(entity_data.merge(test1: nil))
+    it "doesn't fail when the entity doesn't have optional props" do
+      entity = OpenStruct.new(test1: nil)
       validator = Validators::TestUnknownEntityValidator.new(entity)
       expect(validator).not_to be_valid
       expect(validator.errors).to include(:test1)

spec/support/shared_validator_specs.rb

@@ -1,6 +1,8 @@
 def entity_stub(entity, data={})
-  OpenStruct.new(Fabricate.schematic(entity).options[:class_name].default_values
-                   .merge(Fabricate.attributes_for(entity)).merge(data))
+  entity_class = Fabricate.schematic(entity).options[:class_name]
+  allow_any_instance_of(entity_class).to receive(:freeze)
+  allow_any_instance_of(entity_class).to receive(:validate)
+  entity_class.new(Fabricate.attributes_for(entity).merge(data))
 end
 
 ALPHANUMERIC_RANGE = [*"0".."9", *"A".."Z", *"a".."z"].freeze