add publish button test to Jest test suite

[first-timers]

Hi, this is a first-timers-only issue. This means we've worked to make it more legible to folks who either haven't contributed to our codebase before, or even folks who haven't contributed to open source before.

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🤔 What you will need to know.

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📋 Step by Step

• 🙋 Claim this issue: Comment below. If someone else has claimed it, ask if they've opened a pull request already and if they're stuck -- maybe you can help them solve a problem or move it along!

• 📝 Update the file test/ui-testing/publishButton.test.js in the PublicLab.Editor repository (press the little pen Icon) and edit the line as shown below.

See this page for some help in taking your first steps!

Below is a "diff" showing in red (and a -) which lines to remove, and in green (and a +) which lines to add:

@@ -7,8 +7,14 @@ beforeAll(async () => {
 
 describe('Publish button', () => {
   
-  test('something we are testing described here', () => {
-
-  });
+  test('publish button gets enabled', () => {
+    // Check initially that Publish button is disabled.
+    expect($('.ple-publish').prop('disabled')).toBe(true);
+    // Add title.
+    $('.ple-module-title input').val('A title');
+    $('.ple-module-title input').keydown();
+    // Check final state of Publish button.
+    expect($('.ple-publish').prop('disabled')).toBe(false);
+  }, timeout);
   
 });

• 💾 Commit your changes

• 🔀 Start a Pull Request. There are two ways how you can start a pull request:

1. If you are familiar with the terminal or would like to learn it, here is a great tutorial on how to send a pull request using the terminal.

2. You can also edit files directly in your browser and open a pull request from there.

• 🏁 Done Ask in comments for a review :)

🤔❓ Questions?

Leave a comment below!

Is someone else already working on this?

We encourage you to link to this issue by mentioning the issue # in your pull request, so we can see if someone's already started on it. If someone seem stuck, offer them some help! Otherwise, take a look at some other issues you can help with. Thanks!

(This issue was created by First-Timers-Bot.)

[Onyeka Ikwuegbu]

@jywarren can I work on this issue?

[Onyeka Ikwuegbu]

@jywarren Yes.

[Rasmita]

Hey!
Can you assign this issue to me?

[Onyeka Ikwuegbu]

@jywarren I just made a pull request for review. Thank you.

[Tarun Raveesh]

Hey, I've made a pull request @jywarren... Could u pls make a review so that I could get merge access...

[Nishant Shah]

is this issue assigned?
@TildaDares

[Jeffrey Warren]

Hi @TarunRaveesh I see your PR at #749 - thanks! @nshah1729 it looks like we have this one worked on already, if you'd like to try a similar one from the original issue at #743 you're welcome; if you'd like to try a first-timers-only we can make one for you from that issue as well!