Sergey Biryukov 3a63ed2939 Tests: Use more specific assertions in image saving tests.
When passed a `WP_Image_Editor` instance as the `$image` parameter, `wp_save_image_file()` returns an array on success, so we can specifically check for an array instead of any non-empty result.

Likewise, in PDF tests, when creating an attachment is expected to return an integer ID and not a `WP_Error` object, we can specifically check for that.

Follow-up to [1061/tests], [38949], [39617], [42792], [53529], [53530], [53531], [55019], [55066].

See #56793.

git-svn-id: https://develop.svn.wordpress.org/trunk@55070 602fd350-edb4-49c9-b593-d223f7449a82
2023-01-15 13:36:10 +00:00
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