     let request = Request.makeTest(method: .get)
     let res = try eventContoller.show(request, event: event).makeResponse()
     
-    checkEventHasRequiredFields(json: res.json)
+    assertEventHasRequiredFields(json: res.json)
   }
   
   func testThatShowEventReturnsJSONWithExpectedFields() throws {

    let eventJSON1 = resAfter.json?.array?.first
    let eventJSON2 = resBefore.json?.array?.first
    
    try checkEventHasExpectedFields(json: eventJSON1, event: event1)
    try checkEventHasExpectedFields(json: eventJSON2, event: event2)
  }
  
  func testThatIndexEventsReturnsCorrectNumberOfPastEvents() throws {

    XCTAssertNotNil(cityJSON?["city_name"])
  }
  
  fileprivate func assertEventHasExpectedFields(json: JSON?, event: App.Event) throws {
    guard let place = try event.place() else {
      XCTFail()
      return
