def testMissingNormals(self):
        self.assertRaises(pywavefront.PywavefrontException,
                pywavefront.Wavefront, 'simple_missing_normals.obj')
If there are texture coordinates but no normals, should raise an exception.
dataset/ETHPy150Open greenmoss/PyWavefront/test/test_wavefront.py/TestBrokenWavefront.testMissingNormals