Using the network block device (nbd) kernel module to test all
the non-raw image formats often caused tests to fail due to nbd
not being stable itself (see below).
Instead convert non-raw images to the raw format via qemu-img
convert and mount those with loop-back devices. All the testing
code itself stays the same.
Example nbd error messages:
kernel: block nbd15: NBD_DISCONNECT
kernel: block nbd15: Disconnected due to user request.
kernel: print_req_error: 89 callbacks suppressed
kernel: blk_update_request: I/O error, dev nbd15, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
kernel: buffer_io_error: 134 callbacks suppressed
kernel: Buffer I/O error on dev nbd15, logical block 0, async page read
kernel: blk_update_request: I/O error, dev nbd15, sector 1 op 0x0:(READ) flags 0x0 phys_seg 7 prio class 0
Split up the partition table test into reading the partition table
and then asserting it has the correct entries. Prepares the usage
of the partition information later.
Move the last remaining test into the correct subdir. With this done,
all our tests run in one of the 3 groups:
* `make test-src`
Run tests against the source-code, including linters.
* `make test-mod`
Run unit-tests on the individual python modules. This needs no
special permissions (unless noted in each test) or runtime
environments. It is meant to be fast and easy to run in all
circumstances.
* `make test-run`
Run tests that execute the osbuild pipeline. This requires
superuser privileges and will likely take a while. Furthermore,
this might produce large artifacts.
