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"""Tests for IPython.core.ultratb
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"""
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import os.path
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import unittest
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from IPython.testing import tools as tt
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from IPython.utils.syspathcontext import prepended_to_syspath
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from IPython.utils.tempdir import TemporaryDirectory
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ip = get_ipython()
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file_1 = """1
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2
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3
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def f():
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1/0
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"""
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file_2 = """def f():
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1/0
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"""
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class ChangedPyFileTest(unittest.TestCase):
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def test_changing_py_file(self):
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"""Traceback produced if the line where the error occurred is missing?
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https://github.com/ipython/ipython/issues/1456
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"""
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with TemporaryDirectory() as td:
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fname = os.path.join(td, "foo.py")
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with open(fname, "w") as f:
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f.write(file_1)
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with prepended_to_syspath(td):
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ip.run_cell("import foo")
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with tt.AssertPrints("ZeroDivisionError"):
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ip.run_cell("foo.f()")
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# Make the file shorter, so the line of the error is missing.
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with open(fname, "w") as f:
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f.write(file_2)
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# For some reason, this was failing on the *second* call after
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# changing the file, so we call f() twice.
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with tt.AssertNotPrints("Internal Python error", channel='stderr'):
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with tt.AssertPrints("ZeroDivisionError"):
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ip.run_cell("foo.f()")
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with tt.AssertPrints("ZeroDivisionError"):
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ip.run_cell("foo.f()")
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