Add Thing#bridge? (#324)

Resolve #323

Signed-off-by: Jimmy Tanagra <jcode@tanagra.id.au>

lib/openhab/core/things/thing.rb

@@ -171,6 +171,11 @@ def bridge
           bridge_uid && EntityLookup.lookup_thing(bridge_uid)
         end
 
+        # @return [true,false] true if this Thing is a bridge
+        def bridge?
+          is_a?(org.openhab.core.thing.Bridge)
+        end
+
         # @return [String]
         def inspect
           r = "#<OpenHAB::Core::Things::Thing #{uid}"

spec/openhab/core/things/thing_spec.rb

@@ -71,4 +71,17 @@
 
     expect(thing.elevation).to be 300
   end
+
+  describe "#bridge?" do
+    it "returns false for non-bridges" do
+      expect(thing).not_to be_bridge
+    end
+
+    it "returns true for bridges" do
+      install_addon "binding-mqtt", ready_markers: "openhab.xmlThingTypes"
+      things.build { bridge "mqtt:broker:mosquitto", "MQTT Broker" }
+
+      expect(things["mqtt:broker:mosquitto"]).to be_bridge
+    end
+  end
 end