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    Interact with Hidden Elements in a Cypress Test


    We often only show UI elements as a result of some user interaction. Cypress detects visibility and by default won’t allow your test to interact with an element that isn’t visible. In this lesson, we’ll work with a button that is shown on hover and see how you can either bypass the visibility restriction or use Cypress to update the state of your application, making items visible prior to interacting with them.



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    Instructor: I've created an inspect file to test the behavior of individual list items, and we're going to test our app's ability to delete an item. Our app will make a delete request to remove an item, let's start by stubbing that delete call.

    I'll start by adding a side.server, followed by side.route, and we'll pass an options object into route. We'll give this a method of delete and a URL, and that's going to go to our /API/todos endpoint.

    This is going to take an ID as part of the URL. We can just use a wildcard here, and then, it'll accept any ID as part of that URL. We'll set up our response, and that's just going to be an empty object.

    At the end of that route, I'm going to tack on an AS to give this an alias, and I'll call it delete. With that set up, let's use our customized SeedAndVisit command to seed our initial data and visit our page.

    Let's save this, then back in the Cypress UI, I'm going to click on the list item spec to open and launch this in the runner. Our test is going to run, we'll see that our app's been seeded with our fixture data when we visit it.

    Let's take a look at how we're going to delete an item. When I hover over an item, we'll see this red x appear on the right-hand side. I'm going to right-click on that, and I'm going to choose inspect.

    We'll see that for each item in our list, we have an li with a div that has the class view, followed by an input and a button that are siblings. The button that we're interested in has a class of destroy.

    Let's go back to our test and write the code that's going to drill down to this destroy button. For this test, let's delete the first item in our list. Let's call side.get, we'll get our to-do list, and we'll get all of our lis.

    From here, I'm going to chain on the first command and get just the first item. Then, I want to drill into this and find that button with the class destroy. I'm going to use the find command and pass it in the class selector for destroy.

    Let's save this and run it, and see what it does. Our test will run again. We'll see that everything is successful, so far, so good. We're finding all of our elements now exist. But we notice in the command log, next to find for our destroy button, we have this icon that's telling us this element is not visible.

    Let's go back to our code, and ultimately, we want to click on this button. I'm going to chain a click command after find. I'm going to save this again, switch back, and watch the test run.

    This time, we'll see, after a delay, our test is ultimately going to fail. Cypress is going to tell us that it timed out retrying, because the element is not visible. It's also telling us that it's not visible, because it has a css property, display none.

    The suggestion is to fix this problem, meaning, make the button visible, or we can pass this object into our click command with force set to true. Setting force to true here is going to disable error-checking.

    Let's switch back and try that out, see what happens. I'll pass click an object, and I'll give it this force property. I'll set that to true, I'll save this, and we'll run the test again. This time, our test passes.

    But we'll see that in both of these find and click steps, our element is still not visible. Let's take a look at another approach. I'm going to switch back into the code, and I'm going to remove this object.

    Instead of telling it to force the click, before I click, I'm going to make the element visible. We can do that by chaining on an invoke, and passing it the string, show. This is going to show the button before it attempts to click it.

    I'm going to save this and switch back, and our test is going to run. We'll see that it passes again, but this time, our element is not visible at the find or the show. But by the time we get to the click, that element is visible.

    We can see in the snapshot, if we pin this down, that button was in fact visible at that point in our test. Now that our visibility has been dealt with, let's switch back to the code and finish our test with some assertions.

    After this chain, I'm going to drop down and I'm going to throw a side.wait in here. I'm going to wait for that delete call to respond, and I'm going to use side.get again. I'm going to get that to-do list and all the lis. I'm going to assert that they should have a length of three, because we know we're starting with four because of our seed data.

    We've deleted an item. I'll save this, we'll switch back and verify that everything in our test is working as expected and our assertion is passing.