Method test_changing_py_file

IPython/core/tests/test_ultratb.py:58–84

Traceback produced if the line where the error occurred is missing? https://github.com/ipython/ipython/issues/1456

(self)

class ChangedPyFileTest(unittest.TestCase):
    def test_changing_py_file(self):
        """Traceback produced if the line where the error occurred is missing?
        
        https://github.com/ipython/ipython/issues/1456
        """
        with TemporaryDirectory() as td:
            fname = os.path.join(td, "foo.py")
            with open(fname, "w") as f:
                f.write(file_1)
            
            with prepended_to_syspath(td):
                ip.run_cell("import foo")
            
            with tt.AssertPrints("ZeroDivisionError"):
                ip.run_cell("foo.f()")
            
            # Make the file shorter, so the line of the error is missing.
            with open(fname, "w") as f:
                f.write(file_2)
            
            # For some reason, this was failing on the *second* call after
            # changing the file, so we call f() twice.
            with tt.AssertNotPrints("Internal Python error", channel='stderr'):
                with tt.AssertPrints("ZeroDivisionError"):
                    ip.run_cell("foo.f()")
                with tt.AssertPrints("ZeroDivisionError"):
                    ip.run_cell("foo.f()")

iso_8859_5_file = u'''# coding: iso-8859-5