Add/edit posts tests

[tellthemachines]

Sequel to #200, fixes element targeting issues in some of the tests.

Trac ticket: https://core.trac.wordpress.org/ticket/49507

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[youknowriad]

Great work here. Love seeing e2e test added to Core. It's important though to not add Gutenberg e2e tests to Core because we already have a way to run Gutenberg tests in Core.

I think this one is ready for commit

[JustinyAhin]

I've run the tests, and they work as expected.

@tellthemachines I was wondering, does it make sense to add a README to the e2e folder with information about how to run the test, how to enable headless mode for the tests for instance?

Also, what does this needs to get merged?

[talldan]

There's a README over here @JustinyAhin - #1451.

[hellofromtonya]

@tellthemachines @talldan Is this PR ready for commit? Does it overlap any of the work that @JustinyAhin is doing?

[tellthemachines]

@hellofromtonya yup, this one's ready to go. It doesn't overlap with Justin's PRs as this is specific to the posts screen and Justin has been focusing on other screens so far.

[hellofromtonya]

When running this test locally (via npm run test:e2e), I get the following error:

 FAIL  tests/e2e/specs/edit-posts.test.js (76.359 s)
  ● Edit Posts › allows an existing post to be edited using the Edit button

    TimeoutError: waiting for selector `.components-snackbar` failed: timeout 30000ms exceeded

      44 | 		const title = 'Test Title';
      45 | 		await createNewPost( { title } );
    > 46 | 		await publishPost();
         | 		^
      47 | 		await visitAdminPage( '/edit.php' );
      48 |
      49 | 		await page.waitForSelector( '#the-list .type-post' );

      at new WaitTask (../../node_modules/puppeteer-core/src/common/DOMWorld.ts:780:28)
      at DOMWorld.waitForSelectorInPage (../../node_modules/puppeteer-core/src/common/DOMWorld.ts:632:22)
      at Object.internalHandler.waitFor (../../node_modules/puppeteer-core/src/common/QueryHandler.ts:78:19)
      at DOMWorld.waitForSelector (../../node_modules/puppeteer-core/src/common/DOMWorld.ts:490:25)
      at Frame.waitForSelector (../../node_modules/puppeteer-core/src/common/FrameManager.ts:1163:47)
      at Page.waitForSelector (../../node_modules/puppeteer-core/src/common/Page.ts:2100:29)
      at publishPost (../../node_modules/@wordpress/e2e-test-utils/build/@wordpress/e2e-test-utils/src/publish-post.js:19:14)
          at runMicrotasks (<anonymous>)
      at Object.<anonymous> (specs/edit-posts.test.js:46:3)

  ● Edit Posts › allows an existing post to be deleted using the Trash button

    TimeoutError: waiting for selector `.components-snackbar` failed: timeout 30000ms exceeded

      110 | 		const title = 'Test Title';
      111 | 		await createNewPost( { title } );
    > 112 | 		await publishPost();
          | 		^
      113 | 		await visitAdminPage( '/edit.php' );
      114 |
      115 | 		await page.waitForSelector( '#the-list .type-post' );

      at new WaitTask (../../node_modules/puppeteer-core/src/common/DOMWorld.ts:780:28)
      at DOMWorld.waitForSelectorInPage (../../node_modules/puppeteer-core/src/common/DOMWorld.ts:632:22)
      at Object.internalHandler.waitFor (../../node_modules/puppeteer-core/src/common/QueryHandler.ts:78:19)
      at DOMWorld.waitForSelector (../../node_modules/puppeteer-core/src/common/DOMWorld.ts:490:25)
      at Frame.waitForSelector (../../node_modules/puppeteer-core/src/common/FrameManager.ts:1163:47)
      at Page.waitForSelector (../../node_modules/puppeteer-core/src/common/Page.ts:2100:29)
      at publishPost (../../node_modules/@wordpress/e2e-test-utils/build/@wordpress/e2e-test-utils/src/publish-post.js:19:14)
          at runMicrotasks (<anonymous>)
      at Object.<anonymous> (specs/edit-posts.test.js:112:3)

 PASS  tests/e2e/specs/dashboard.test.js
 PASS  tests/e2e/specs/hello.test.js

Test Suites: 1 failed, 2 passed, 3 total
Tests:       2 failed, 6 passed, 8 total
Snapshots:   0 total
Time:        79.215 s

@tellthemachines Does it pass locally for you?

[tellthemachines]

@hellofromtonya it passes for me! I rebased the branch in case it helps at all.

[hellofromtonya]

Committed via changeset https://core.trac.wordpress.org/changeset/51990.