Method test_changing_py_file

tests/test_ultratb.py:51–77

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_1456.py")
            with open(fname, "w", encoding="utf-8") as f:
                f.write(file_1)

            with prepended_to_syspath(td):
                ip.run_cell("import foo_1456")

            with tt.AssertPrints("ZeroDivisionError"):
                ip.run_cell("foo_1456.f()")

            # Make the file shorter, so the line of the error is missing.
            with open(fname, "w", encoding="utf-8") 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_1456.f()")
                with tt.AssertPrints("ZeroDivisionError"):
                    ip.run_cell("foo_1456.f()")


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