def test_from_string(self):
     sp = DummySpecie.from_string("X")
     self.assertEqual(sp.oxi_state, 0)
     sp = DummySpecie.from_string("X2+")
     self.assertEqual(sp.oxi_state, 2)
     sp = DummySpecie.from_string("X2+spin=5")
     self.assertEqual(sp.oxi_state, 2)
     self.assertEqual(sp.spin, 5)

    def from_dict(cls, d, lattice=None):
        """
        Create PeriodicSite from dict representation.

        Args:
            d (dict): dict representation of PeriodicSite
            lattice: Optional lattice to override lattice specified in d.
                Useful for ensuring all sites in a structure share the same
                lattice.

        Returns:
            PeriodicSite
        """
        atoms_n_occu = {}
        for sp_occu in d["species"]:
            if "oxidation_state" in sp_occu and Element.is_valid_symbol(
                    sp_occu["element"]):
                sp = Specie.from_dict(sp_occu)
            elif "oxidation_state" in sp_occu:
                sp = DummySpecie.from_dict(sp_occu)
            else:
                sp = Element(sp_occu["element"])
            atoms_n_occu[sp] = sp_occu["occu"]
        props = d.get("properties", None)
        lattice = lattice if lattice else Lattice.from_dict(d["lattice"])
        return cls(atoms_n_occu, d["abc"], lattice, properties=props)

 def test_safe_from_composition(self):
     c = Composition({'Xa': 1, 'Fe': 1})
     self.assertEqual(DummySpecie.safe_from_composition(c).symbol, 'Xb')
     self.assertEqual(DummySpecie.safe_from_composition(c, 1).symbol, 'Xb')