Assert it properly and thus give out the target name where the
issue is, rather than just error out with KeyError and leave the
poor sod wondering where exactly the issue is.
Before:
```
=================================== FAILURES ===================================
_____________________________ test_bl_has_sectors ______________________________
def test_bl_has_sectors():
"""Assert a bootloader supporting pack has sector information"""
cache = Cache(True, True)
named_targets = (
target for target in TARGETS if
(hasattr(target, "device_name") and getattr(target, "bootloader_supported", False))
)
for target in named_targets:
assert target.device_name in cache.index,\
("Target %s contains invalid device_name %s" %
(target.name, target.device_name))
> assert cache.index[target.device_name]["sectors"],\
("Device name %s is misssing sector information" %
(target.device_name))
E KeyError: 'sectors'
```
After
```
___________________________________________________ test_bl_has_sectors ___________________________________________________
def test_bl_has_sectors():
"""Assert a bootloader supporting pack has sector information"""
# ToDo: validity checks for the information IN the sectors!
cache = Cache(True, True)
named_targets = (
target for target in TARGETS if
(hasattr(target, "device_name") and getattr(target, "bootloader_supported", False))
)
for target in named_targets:
assert target.device_name in cache.index,\
("Target %s contains invalid device_name %s" %
(target.name, target.device_name))
> assert "sectors" in cache.index[target.device_name],\
("Target %s does not have sectors" %
(target.name))
E AssertionError: Target NUCLEO_L073RZ does not have sectors
E assert 'sectors' in {'algorithms': [{'default': True, 'file_name': 'CMSIS/Flash/STM32L0xx_192.FLM', 'ram_size': None, 'ram_start': None, ....on_secure_callable': False, 'peripheral': False, ...}, 'default': True, 'size': 196608, 'start': 134217728, ...}}, ...}
```
This helps you finding the offending target a bit faster.
Kudos to Jammu Kekkonen (jammu.kekkonen@arm.com) to figuring out how to actually
run this test & the assertion.
Ref: Mbed OS issue #12219