def build_rupture_from_file(rupture_file, simple_mesh_spacing=1.0,
                            complex_mesh_spacing=1.0):
    """
    Parses a rupture from the OpenQuake nrml 4.0 format and parses it to
    an instance of :class: openquake.hazardlib.source.rupture.Rupture
    """
    [rup_node] = nrml.read(rupture_file)
    conv = RuptureConverter(simple_mesh_spacing,
                            complex_mesh_spacing)
    return conv.convert_node(rup_node)
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    def test_case_17(self):  # oversampling and save_ruptures
        # also, grp-00 does not produce ruptures
        expected = [
            'hazard_curve-mean.csv',
            'hazard_curve-rlz-001.csv',
            'hazard_curve-rlz-002.csv',
            'hazard_curve-rlz-003.csv',
            'hazard_curve-rlz-004.csv',
        ]
        # test the --hc functionality, i.e. that ruptures are read correctly
        out = self.run_calc(case_17.__file__, 'job.ini,job.ini', exports='csv')
        fnames = out['hcurves', 'csv']
        for exp, got in zip(expected, fnames):
            self.assertEqualFiles('expected/%s' % exp, got)

        # check that a single rupture file is exported even if there are
        # several collections
        [fname] = export(('ruptures', 'xml'), self.calc.datastore.parent)
        self.assertEqualFiles('expected/ses.xml', fname)

        # check that the exported file is parseable
        rupcoll = nrml.to_python(fname, RuptureConverter(1))
        self.assertEqual(list(rupcoll), [1])  # one group
        self.assertEqual(len(rupcoll[1]), 3)  # three EBRuptures

        # check that GMFs are not stored
        with self.assertRaises(KeyError):
            self.calc.datastore['gmf_data']