Simulate a Network Error Using .intercept() Command

Filip Hric
InstructorFilip Hric
Share this video with your friends

Social Share Links

Send Tweet
Published 2 years ago
Updated 2 years ago

You can simulate a network condition, where an http request does not make it to server. When that happens, you want to make sure the app is showing the user a correct message. By passing forceNetworkError attribute, you’ll be able to simulate such network conditions and see how application behaves under given circumstances.

Instructor: [0:00] When we open our application, the list of the boards is loaded through this HTTP request. To match this request, we can create a new intercept and define the method and then the URL of that request. When I Save my test file, I can see the list of matched roots inside the Cypress Runner.

[0:28] We don't have an alias for our request, so let's add one. I'm going to type a new command, .as(), which stands for alias, and then name the request Boards. I can now see the alias inside the Cyprus Runner.

[0:44] The first argument of our intercept command defines which request we want to match. We can add a second argument. This one will define how we want to handle that request. I can pass a force network error to be true. When I now Save my test, I can see how my application behaves when there is a network error.

[1:08] This enables me to check if this message actually appears. I can open the Selector Playground, find the proper selector, copy it and paste that to my code. Now, all that's missing is an assertion, so let me add one. I want to make sure that the element is visible. When I Save the test, you can see it's passing.

egghead
egghead
~ 2 hours ago

Member comments are a way for members to communicate, interact, and ask questions about a lesson.

The instructor or someone from the community might respond to your question Here are a few basic guidelines to commenting on egghead.io

Be on-Topic

Comments are for discussing a lesson. If you're having a general issue with the website functionality, please contact us at support@egghead.io.

Avoid meta-discussion

  • This was great!
  • This was horrible!
  • I didn't like this because it didn't match my skill level.
  • +1 It will likely be deleted as spam.

Code Problems?

Should be accompanied by code! Codesandbox or Stackblitz provide a way to share code and discuss it in context

Details and Context

Vague question? Vague answer. Any details and context you can provide will lure more interesting answers!

Markdown supported.
Become a member to join the discussionEnroll Today