Recent changes to mkimage introduced a validation step to ensure that
the 'default' property under the /configurations node in a FIT image
references a valid configuration subnode. If the referenced node is
missing, mkimage will now return an error.
This patch adds a Python test case to verify that mkimage correctly
fails when the 'default' configuration does not exist. The test creates
a minimal ITS with an invalid default reference and checks that mkimage
produces the expected error message.
Signed-off-by: Aristo Chen <aristo.chen@canonical.com>
Add a test case to verify that mkimage correctly rejects a FIT source
that references a non-existent image from a configuration node.
This test introduces a minimal ITS that defines a valid kernel image
but references a missing "fdt" image under the /configurations section.
The test asserts that mkimage fails with a clear error message, as
introduced in the new validation logic.
This helps ensure the validation logic behaves correctly and prevents
regressions in future FIT enhancements.
Signed-off-by: Aristo Chen <aristo.chen@canonical.com>
