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Changes between Initial Version and Version 1 of Ticket #6278, comment 58

initial	v1
18	18	* `BP_Attachment_Extend` doesn't make sense to me as a class name for the unit tests. I suggest something like `BP_Tests_Attachment`??.
19	19	* Do we really need to upload files in our unit tests and write them to disk? It will be slow. Can't we just fake some data to pretend that has happened?
20		* The `rrmdir` function would be go in the base `BP_UnitTestCase` to avoid duplicating them.
	20	* The `rrmdir` function would best go in the base `BP_UnitTestCase` to avoid duplicating them.
21	21	* For `test_bp_upload_dir_ms`, please see #6162.
22	22	* The more mime type handlers we have to write, the more unit tests I want for them. If we can use WP's functions here, I don't mind not having unit tests for them.