Add system and API tests

[gibmat]

Closes #376

[baconYao]

IMHO, after reviewing this piece of code, I performed the following refactoring:

1. Introduced a single mapping structure to reduce repetitive for-loops, improving readability and maintainability.

2. Added a helper function collect_tests to retrieve all functions starting with Test from the specified modules.

[baconYao]

Suggested change

	SUFFIX_IMG = "img"
	SUFFIX_ISO = "iso"

[baconYao]

Suggested change

	def collect_tests(modules, image, suffix=SUFFIX_IMG):
	"""Collect only functions starting with 'Test' from given modules."""
	collected = []
	for mod in modules:
	for name, fn in getmembers(mod, isfunction):
	if not name.startswith("Test"):
	continue
	collected.append([f"{name}/{suffix}", fn, image])
	return collected

[baconYao]

Suggested change

	# Basic system pre-install checks
	for name, fn in getmembers(tests_install_system_checks, isfunction):
	ret.append([name + "/img", fn, image_img])
	# Baseline install smoke tests
	for name, fn in getmembers(tests_install_smoke, isfunction):
	ret.append([name + "/img", fn, image_img])
	ret.append([name + "/iso", fn, image_iso])
	# Basic application seed tests
	for name, fn in getmembers(tests_seed_applications, isfunction):
	ret.append([name + "/img", fn, image_img])
	# Basic install seed tests
	for name, fn in getmembers(tests_seed_install, isfunction):
	ret.append([name + "/img", fn, image_img])
	# External install seed tests
	for name, fn in getmembers(tests_install_external_seed, isfunction):
	ret.append([name + "/img", fn, image_img])
	# Basic system upgrade tests
	for name, fn in getmembers(tests_upgrade, isfunction):
	ret.append([name + "/img", fn, old_image_img])
	# IncusOS API tests
	for name, fn in getmembers(tests_incusos_api, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_applications, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_debug, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_services, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_system, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_system_logging, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_system_network, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_system_provider, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_system_resources, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_system_security, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_system_storage, isfunction):
	ret.append([name + "/img", fn, image_img])
	for name, fn in getmembers(tests_incusos_api_system_update, isfunction):
	ret.append([name + "/img", fn, image_img])
	# SecureBoot key rotation tests
	for name, fn in getmembers(tests_secureboot_key_rotation, isfunction):
	ret.append([name + "/img", fn, image_img])
	# Recovery mode tests
	for name, fn in getmembers(tests_recovery, isfunction):
	if "_" not in name:
	ret.append([name + "/img", fn, image_img])
	# mapping table for modules and image
	mapping = [
	# Pre-install checks
	([tests_install_system_checks], image_img, SUFFIX_IMG),
	# Smoke tests
	([tests_install_smoke], image_img, SUFFIX_IMG),
	([tests_install_smoke], image_iso, SUFFIX_ISO),
	# Seed-related
	([tests_seed_applications], image_img, SUFFIX_IMG),
	([tests_seed_install], image_img, SUFFIX_IMG),
	([tests_install_external_seed], image_img, SUFFIX_IMG),
	# Upgrade tests
	([tests_upgrade], old_image_img, SUFFIX_IMG),
	# IncusOS API tests
	(
	[
	tests_incusos_api,
	tests_incusos_api_applications,
	tests_incusos_api_debug,
	tests_incusos_api_services,
	tests_incusos_api_system,
	tests_incusos_api_system_logging,
	tests_incusos_api_system_network,
	tests_incusos_api_system_provider,
	tests_incusos_api_system_resources,
	tests_incusos_api_system_security,
	tests_incusos_api_system_storage,
	tests_incusos_api_system_update,
	],
	image_img,
	SUFFIX_IMG,
	),
	# SecureBoot key rotation tests
	([tests_secureboot_key_rotation], image_img, SUFFIX_IMG),
	# Recovery tests
	([tests_recovery], image_img, SUFFIX_IMG),
	]
	for modules, image, suffix in mapping:
	ret.extend(collect_tests(modules, image, suffix))