Upgrade QUnit to 2.9.x

[jorbin]

QUnit 2.0.0 has been ​released. There is a ​upgrade guide to assist in the migration.

[desrosj]

The ​current version of QUnit is now 2.3.2.

[Presskopp]

2.9.2
trentmwillis released this 19 days ago · 4 commits to master since this release

See
​https://github.com/qunitjs/qunit/releases

[pento]

Is there anything in newer versions of QUnit that we particularly need? The QUnit tests really haven't evolved or expanded in recent years.

Alternatively, Gutenberg has a well developed test library based on Jest, and exports all of the config as a package we could use. In the interest of standardising, perhaps the better option would be migrate our existing QUnit tests to work in Jest, instead.

[SergeyBiryukov]

While migrating our existing QUnit tests to work in Jest seems like good idea, updating to the latest QUnit seemed like a good first step for me to get more familiar with them. Started this as an experiment, which turned out to be successful.

In 37117.diff​:

• Update QUnit and Sinon to the latest versions.
• Remove the abandoned sinon-qunit script (added in [27846]).
• Update the tests per the ​QUnit 2.x Upgrade Guide.
• The tests pass: ​https://travis-ci.com/github/SergeyBiryukov/wordpress-develop/jobs/302244802

[SergeyBiryukov]

In 47512:

Build/Test Tools: Update QUnit and Sinon to the latest versions.

Update JS tests per the QUnit 2.x Upgrade Guide.

Fixes #37117.

[SergeyBiryukov]

In 48977:

Build/Test Tools: Remove unused legacy globals from JSHint config for QUnit.

Follow-up to [47512].

Props TimoTijhof.
Fixes #51312. See #37117.

[SergeyBiryukov]

In 48978:

Build/Test Tools: Restore the QUnit global in JSHint config for QUnit.

Follow-up to [47512], [48977].

See #51312, #37117.