Add code + test for #436

Author: jimbolla

src/components/connectAdvanced.js

@@ -64,6 +64,12 @@ export default function connectAdvanced(
   }  
 
   return function wrapWithConnect(WrappedComponent) {
+    invariant(
+      typeof WrappedComponent == 'function',
+      `You must pass a component to the function returned by ` +
+      `connect. Instead received ${WrappedComponent}`
+    )
+
     const wrappedComponentName = WrappedComponent.displayName
       || WrappedComponent.name
       || 'Component'

test/components/connect.spec.js

@@ -1017,6 +1017,12 @@ describe('React', () => {
       expect(stub.props.passVal).toBe('otherval')
     })
 
+    it('should throw an error if a component is not passed to the function returned by connect', () => {
+      expect(connect()).toThrow(
+        /You must pass a component to the function/
+      )
+    })
+ 
     it('should throw an error if mapState, mapDispatch, or mergeProps returns anything but a plain object', () => {
       const store = createStore(() => ({}))