Add tests

test/remote/spec/state_spec.rb

@@ -71,5 +71,20 @@ RSpec.describe 'State' do
       expect(group_1_state.keys).to include(*desired_state.keys)
       expect(group_1_state.select { |x| desired_state.include?(x) } ).to eq(desired_state)
     end
+
+    it 'should keep group 0 state' do
+      group_0_params = @id_params.merge(group_id: 0)
+      desired_state = {
+        'status' => 'ON',
+        'level' => 100,
+        'hue' => 0,
+        'saturation' => 100
+      }
+
+      patched_state = @client.patch_state(desired_state, group_0_params)
+
+      expect(patched_state.keys).to include(*desired_state.keys)
+      expect(patched_state.select { |x| desired_state.include?(x) } ).to eq(desired_state)
+    end
   end
 end