new_contents: import sys
  import os
  
  ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", ".."))
  sys.path.insert(0, ROOT)
  
  from tools.toolchains import TOOLCHAIN_CLASSES, LEGACY_TOOLCHAIN_NAMES
  from tools.targets import TARGET_MAP
  
  def test_instantiation():
      for name, Class in  TOOLCHAIN_CLASSES.items():
          CLS = Class(TARGET_MAP["K64F"])
          assert name == CLS.name or name ==  LEGACY_TOOLCHAIN_NAMES[CLS.name]
  
subject: Add a test that exercises the abstract base class checking