Ensure all AMS options are passed through.

See the following for details:
* https://github.com/rails-api/active_model_serializers/blob/master/docs/general/rendering.md
* https://github.com/rails-api/active_model_serializers/blob/master/docs/general/adapters.md

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 * Your contribution here.
 * [#74](https://github.com/ruby-grape/grape-active_model_serializers/pull/74): Add support for Sequel - [@drn](https://github.com/drn).
+* [#73](https://github.com/ruby-grape/grape-active_model_serializers/pull/73): Ensure all AMS options are passed through - [@drn](https://github.com/drn).
 * [#65](https://github.com/ruby-grape/grape-active_model_serializers/pull/65): Added Danger, PR linter - [@dblock](https://github.com/dblock).
 * [#63](https://github.com/ruby-grape/grape-active_model_serializers/pull/63): Pass adapter options through render - [@drn](https://github.com/drn).
 

lib/grape-active_model_serializers/endpoint_extension.rb

@@ -43,7 +43,8 @@ module Grape
         :meta, :meta_key
       )
       env['ams_adapter'] = options.slice(
-        :adapter, :serializer, :each_serializer
+        :adapter, :serializer, :each_serializer, :include,
+        :fields, :key_transform, :links, :namespace
       )
       env['ams_extra'] = options[:extra]
       resources

spec/grape-active_model_serializers/endpoint_extension_spec.rb

@@ -16,45 +16,126 @@ describe 'Grape::EndpointExtension' do
   end
 
   let(:serializer) { Grape::Formatter::ActiveModelSerializers }
-
-  let(:user) do
+  let(:user) {
     Object.new do
       def name
         'sven'
       end
     end
-  end
-
+  }
   let(:users) { [user, user] }
 
   describe '#render' do
+    let(:env) { {} }
+    let(:env_key) {}
+
     before do
-      allow(subject).to receive(:env).and_return({})
+      allow(subject).to receive(:env).and_return(env)
+    end
+
+    shared_examples_for 'option capture' do
+      it 'captures options' do
+        subject.render(users, options)
+        expect(env[env_key]).to eq(options)
+      end
+    end
+
+    shared_examples_for 'skipped option capture' do
+      it 'does not capture options' do
+        subject.render(users, options)
+        expect(env[env_key]).to eq({})
+      end
     end
 
     it { should respond_to(:render) }
-    let(:meta_content) { { total: 2 } }
-    let(:meta_full) { { meta: meta_content } }
 
-    context 'supplying meta' do
-      before do
-        allow(subject).to receive(:env) { { meta: meta_full } }
+    context 'meta options' do
+      let(:env_key) { 'ams_meta' }
+      let(:meta_full) { { meta: meta_content } }
+
+      context 'meta' do
+        let(:options) { { meta: { total: 2 } } }
+        it_behaves_like 'option capture'
       end
 
-      it 'passes through the Resource and uses given meta settings' do
-        expect(subject.render(users, meta_full)).to eq(users)
+      context 'meta_key' do
+        let(:options) { { meta_key: 'custom_meta' } }
+        it_behaves_like 'option capture'
+      end
+
+      context 'unknown option' do
+        let(:options) { { unknown: 'value' } }
+        it_behaves_like 'skipped option capture'
       end
     end
 
-    context 'supplying meta and key' do
-      let(:meta_key) { { meta_key: :custom_key_name } }
+    context 'adapter options' do
+      let(:options) { {} }
+      let(:env_key) { 'ams_adapter' }
 
-      before do
-        allow(subject).to receive(:env) { { meta: meta_full.merge(meta_key) } }
+      context 'adapter' do
+        let(:options) { { adapter: :json } }
+        it_behaves_like 'option capture'
       end
 
-      it 'passes through the Resource and uses given meta settings' do
-        expect(subject.render(users, meta_full.merge(meta_key))).to eq(users)
+      context 'include' do
+        let(:options) { { include: '*' } }
+        it_behaves_like 'option capture'
+      end
+
+      context 'fields' do
+        let(:options) { { fields: [:id] } }
+        it_behaves_like 'option capture'
+      end
+
+      context 'key_transform' do
+        let(:options) { { key_transform: :camel_lower } }
+        it_behaves_like 'option capture'
+      end
+
+      context 'links' do
+        let(:links_object) {
+          {
+            href: 'http://example.com/api/posts',
+            meta: {
+              count: 10
+            }
+          }
+        }
+        let(:options) { { links: links_object } }
+        it_behaves_like 'option capture'
+      end
+
+      context 'namespace' do
+        let(:options) { { namespace: V4 } }
+        it_behaves_like 'option capture'
+      end
+
+      context 'unknown option' do
+        let(:options) { { unknown: 'value' } }
+        it_behaves_like 'skipped option capture'
+      end
+    end
+
+    context 'extra options' do
+      let(:env_key) { 'ams_extra' }
+
+      context 'namespace' do
+        let(:options) { { extra: { option: 'value' } } }
+
+        it 'captures options' do
+          subject.render(users, options)
+          expect(env[env_key]).to eq(options[:extra])
+        end
+      end
+
+      context 'unknown option' do
+        let(:options) { { unknown: 'value' } }
+
+        it 'does not capture options' do
+          subject.render(users, options)
+          expect(env[env_key]).to eq(nil)
+        end
       end
     end
   end