old_contents: from .. utils import TranspileTestCase, BuiltinFunctionTestCase
  
  
  class AbsTests(TranspileTestCase):
      def test_abs_not_implemented(self):
          self.assertCodeExecution("""
              class NotAbsLike:
                  pass
              x = NotAbsLike()
              try:
                  print(abs(x))
              except TypeError as err:
                  print(err)
              """)
  
  
  class BuiltinAbsFunctionTests(BuiltinFunctionTestCase, TranspileTestCase):
      functions = ["abs"]
  
      not_implemented = [
      ]
  
new_contents: from .. utils import TranspileTestCase, BuiltinFunctionTestCase
  
  from unittest import expectedFailure
  
  
  class AbsTests(TranspileTestCase):
      def test_abs_not_implemented(self):
          self.assertCodeExecution("""
              class NotAbsLike:
                  pass
              x = NotAbsLike()
              try:
                  print(abs(x))
              except TypeError as err:
                  print(err)
              """)
  
      @expectedFailure
      def test_incorrect_abs_call(self):
          self.assertCodeExecution("""
              x = 1
              print(x.abs())
              """)
  
  
  class BuiltinAbsFunctionTests(BuiltinFunctionTestCase, TranspileTestCase):
      functions = ["abs"]
  
      not_implemented = [
      ]
  
subject: add test case for incorrect abs call