spec/lib/wisper/publisher_spec.rb in wisper-2.0.0.rc1 vs spec/lib/wisper/publisher_spec.rb in wisper-2.0.0

@@ -209,18 +209,31 @@
     end
 
     it 'is aliased to .subscribe' do
       expect(publisher).to respond_to(:subscribe)
     end
+
+    it 'raises a helpful error if trying to pass a block' do
+      invalid = ->{
+        publisher.subscribe(:success) do
+          puts
+        end
+      }
+      expect{ invalid.call }.to raise_error(ArgumentError)
+    end
   end
 
   describe '.on' do
     it 'returns publisher so methods can be chained' do
       expect(publisher.on('this_thing_happened') {}).to eq publisher
     end
 
     it 'raise an error if no events given' do
       expect { publisher.on() {} }.to raise_error(ArgumentError)
+    end
+
+    it 'raises an error of no block given' do
+      expect { publisher.on(:something) }.to raise_error(ArgumentError)
     end
 
     it 'returns publisher so methods can be chained' do
       expect(publisher.on(:foo) {}).to eq publisher
     end