Sergey Biryukov 2b9472a669 Tests: Refactor Tests_Image_Functions::test_is_displayable_image_positive() to use a data provider.
Using a data provider has a number of advantages:
1. If the first test case fails, it won't prevent the other test cases from being tested.
2. While the assertion used in this test method ''does'' have a "failure message" (👍), the output from PHPUnit itself will already be more descriptive in case of failure when using a data provider.
3. Using named test cases in the data provider will also make the `--testdox` output much more descriptive and informative.

The actual cases being tested, or the test itself have not been changed.

Includes:
* Changing the conditional addition of the `.ico` file type to be unconditional, it was only needed for PHP < 5.3.
* Adding a `@covers` annotation.

Follow-up to [184/tests], [42780], [53495], [53497], [53521], [53523], [53524].

Props jrf.
See #55652.

git-svn-id: https://develop.svn.wordpress.org/trunk@53525 602fd350-edb4-49c9-b593-d223f7449a82
2022-06-19 15:28:25 +00:00
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