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How to use test_set_backing_file_updates_existing_file method in autotest

Best Python code snippet using autotest_python

base_job_unittest.py

Source:base_job_unittest.py

...442    def test_writes_to_file(self):443        state = base_job.job_state()444        state.set_backing_file('outfile1')445        self.assert_(os.path.exists('outfile1'))446    def test_set_backing_file_updates_existing_file(self):447        state1 = base_job.job_state()448        state1.set_backing_file('second_file')449        state1.set('ns0', 'var1x', 100)450        state1.set_backing_file(None)451        state2 = base_job.job_state()452        state2.set_backing_file('first_file')453        state2.set('ns0', 'var0x', 0)454        state2.set_backing_file('second_file')455        state2.set_backing_file(None)456        state3 = base_job.job_state()457        state3.read_from_file('second_file')458        self.assertEqual(0, state3.get('ns0', 'var0x'))459        self.assertEqual(100, state3.get('ns0', 'var1x'))460    def test_set_backing_file_does_not_overwrite_previous_backing_file(self):...

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