Robolectric provides testing support for Android via the JVM, including testing
of content providers. In order to get these tests to work, we need to avoid
the default behaviour of starting up FDroidApp.onCreate(). This method has a lot
of static state which fails if set multiple times. Instead of trying to ensure
we correctly zero out that state each test, it is preferable to instead never
bother with that in the first place. Expecially when that is not what is under
test (as is the case with content provider tests).
Test downloads with actual files, not dynamically generated things.
Testing with the progress reports is really hard with multiple URLs, so
just test progress with a single URL for now, and multiple URLs can still
be tested without the progress check.
fixes#650https://gitlab.com/fdroid/fdroidclient/issues/650
This is needed so that downloads can be canceled from within an
IntentService. Since the Downloader classes do not have any Thread logic in
them, they shouldn't use Thread logic within them anyway.
This also removes the unused argument to AsyncDownloader.attemptCancel().
