This is xnu-12377.1.9. See this file in:
Directory listing for xnu-12377.1.9//tests/unit/mocks
dt_proxy.c
dt_proxy.h
fake_kinit.c
fibers/
mock_3rd_party.c
mock_alloc.c
mock_attached.c
mock_cpu.c
mock_cpu.h
mock_dynamic.h
mock_mem.c
mock_misc.c
mock_misc.h
mock_pmap.c
mock_pmap.h
mock_thread.c
mock_thread.h
mock_unimpl.c
san_attached.c
std_safe.h
unit_test_utils.c
unit_test_utils.h