import hashlib
class TestFailure(Exception):
  pass
class PrivateTestFailure(Exception):
  pass
class Test(object):
  passed = 0
  numTests = 0
  failFast = False
  private = False
  @classmethod
  def setFailFast(cls):
    cls.failFast = True
  @classmethod
  def setPrivateMode(cls):
    cls.private = True
  @classmethod
  def assertTrue(cls, result, msg=""):
    cls.numTests += 1
    if result == True:
      cls.passed += 1
      print ("1 test passed.")
    else:
      print ("1 test failed. " + msg)
      if cls.failFast:
        if cls.private:
          raise PrivateTestFailure(msg)
        else:
          raise TestFailure(msg)
  @classmethod
  def assertEquals(cls, var, val, msg=""):
    cls.assertTrue(var == val, msg)
  @classmethod
  def assertEqualsHashed(cls, var, hashed_val, msg=""):
    cls.assertEquals(cls._hash(var), hashed_val, msg)
  @classmethod
  def printStats(cls):
    print ("{0} / {1} test(s) passed.".format(cls.passed, cls.numTests))
  @classmethod
  def _hash(cls, x):
    return hashlib.sha1(str(x)).hexdigest()