The actual content type of `application/octet-stream` is up to content
type detection of the reader, and thus may not be stable across
implementations or versions. This showed up when
fd46fc19 ("emacs: document/defcustom notmuch-multipart/alternative-discouraged", 2022-05-14)
introduced a test for omitting a part of type `text/html` because it
expected a part of type `application/octet-stream` to remain in place,
i.e. a part of "unstable type". In particular, tests with `fd46fc19`
would succeed on RHEL/EPEL but fail on all current Fedoras with
```
FAIL multipart/alternative hides html by default
--- T450-emacs-show.16.notmuch-show-multipart-alternative 2022-05-26 15:34:42.100557244 +0000
+++ T450-emacs-show.16.OUTPUT 2022-05-26 15:34:42.102557207 +0000
@@ -24,7 +24,7 @@
uses 64 as the
buffer size.
[ text/html (hidden) ]
-[ 0001-Deal-with-situation-where-sysconf-_SC_GETPW_R_SIZE_M.patch: application/octet-stream (as text/x-diff) ]
+[ 0001-Deal-with-situation-where-sysconf-_SC_GETPW_R_SIZE_M.patch: application/octet-stream (as text/x-patch) ]
From e3bc4bbd7b9d0d086816ab5f8f2d6ffea1dd3ea4 Mon Sep 17 00:00:00 2001
From: Alexander Botero-Lowry <alex.boterolowry@gmail.com>
Date: Tue, 17 Nov 2009 11:30:39 -0800
```
due to the different type detected.
Fix this by giving that message a specicific type of `text/x-diff` in
the test corpus, and adjust all affected test outputs.
Signed-off-by: Michael J Gruber <git@grubix.eu>
Amended-by: db, fix some trailing whitespace
We largely use the corpus under test/corpus for
testing. Unfortunately, many of our tests have grown to depend on
having exactly this set of messages, making it hard to add new message
files for testing specific cases.
We do use a lot of add_message from within the tests, but it's not
possible to use that for adding broken messages, and adding several
messages at once can get unwieldy.
Move the basic corpus under tests/corpora/default, and make it
possible to add new, independent corpora along its side. This means
tons of renames with a few tweaks to add_email_corpus function in
test-lib.sh to let tests specify which corpus to use.
