Break out the generic testing code into something easily re-used, and
improve the API substantially:
* Use generics to reduce the number of equality tests to effectively
a single one
* Make all assert args consistent in that the actual value is always
listed first.
* Add convenience API for common string/array/collection assertions
Add new class to allow testing interleaving of multiple async calls.
Re-implement TestCase's support for this using an internal instance
of the new class.
In RFC822.Date, don't use duplicate time_t and GLib.DateTime properties
-- just use the latter, fix formatting of half-hour time zones, fix
where the that class refers to ISO 8601 instead of RFC822 strings since
that is just plain wrong, and finally when parsing an RFC 822 string,
take note of the timezone offset and store that in the DateTime object,
so it is round-tripped correctly.
Stop passing time_t around everywhere else, just use the UNIX time from
the DateTimes we store for protocol objects anyway, so the time zone is
obvious.
Add unit tests.
If a least one email in a conversation that is in the base folder but
also in another is removed from the base folder, the conversation may
not be removed from the monitor despite possibly not having any email
in the base folder, since the email may not have been completely removed
from the conversation.
This was particulary being seen with GMail accounts where even single
message conversations were not disappering when trashed because the
converation's email was still in All Mail.
This fix does a few things: Avoids hitting the database when checking
a conversation still has email in the base folder, when it does check
only ensures that email are in the base folder, not *any* folder, and
updates ConversationSet::remove_all_emails_by_identifier to do this
check iternally, clean up its API and implementation and avoids having
to use out args calling it.
* test/api/*.vala: Renamed files that contained mock objects to *-mock.vala,
not *-test.vala.
* test/testcase.vala: Renamed to test-case.vala for consistency, remove
TestCase class from Gee package since that's really not true. Clean up
code for consistency.
* test/meson.build, test/CMakeLists.txt: Split TestCase compilation out
into a separate test lib.
