tree 56f9bd49d25f43f55e38692062ec4cb1851d317c
parent 96eb0deb76abc56fb86f637f372c1308061fbd6d
author David Brown <david.brown@linaro.org> 1551813108 -0700
committer David Brown <davidb@davidb.org> 1555474821 +0700

sim: Make the test builder optional

Some of the simulated devices aren't large enough to support the 5 slots
needed to test a multi-image configuration.  To allow this to work, make
the return from the `ImagesBuilder` return an option, so that it will be
able to indicate (with `None`) that this configuration isn't possible to
test, and that the test should be skipped.

Signed-off-by: David Brown <david.brown@linaro.org>