spec/unit/models/message_spec.rb in ably-1.1.7 vs spec/unit/models/message_spec.rb in ably-1.1.8

@@ -604,6 +604,30 @@
         last = from_encoded.last
         expect(last.name).to eql('name2')
       end
     end
   end
+
+  context '#delta_extras (TM2i)' do
+    let(:delta_extras) { message.delta_extras }
+
+    context 'when delta' do
+      let(:message) { subject.new({ extras: { delta: { from: '1234-1234-5678-9009', format: 'vcdiff' } } }) }
+
+      it 'should return vcdiff format' do
+        expect(delta_extras.format).to eq('vcdiff')
+      end
+
+      it 'should return 1234-1234-5678-9009 message id' do
+        expect(delta_extras.from).to eq('1234-1234-5678-9009')
+      end
+    end
+
+    context 'when no delta' do
+      let(:message) { subject.new({ extras: {} }) }
+
+      it 'should return nil' do
+        expect(delta_extras).to eq(nil)
+      end
+    end
+  end
 end