The Common category includes the following blocks: Paragraph, image, headings, list, gallery, quote, audio, cover, video. The paragraph block is the default block type. It should not have any alignment of any kind. It should just flow like you would normally expect. Nothing fancy. Just straigh...
embeds
Block category: Embeds
This post tests various embed blocks: https://twitter.com/WordPress/status/1057136472321613824 Twitter, wide width https://youtu.be/ex8fMxXJDJw YouTube https://www.facebook.com/6427302910/posts/10156380423617911/ https://www.instagram.com/p/BpmueLLgEn_/?utm_source=ig_share_sheet&igshid=1hc...
Media: Twitter Embeds
https://twitter.com/nacin/status/319508408669708289 This post tests WordPress' Twitter Embeds feature.
Post Format: Video (WordPress.tv)
https://wordpress.tv/2009/03/16/anatomy-of-a-wordpress-theme-exploring-the-files-behind-your-theme/ Posted as per the instructions in the Codex.
Edge Case: Many Tags
This post has many tags.