def METHOD_NAME(self):
    """Set up network for electrolyzer tests."""
    self.nw = Network(['O2', 'H2', 'H2O'], T_unit='C', p_unit='bar')
    self.instance = WaterElectrolyzer('electrolyzer')
    fw = Source('feed water')
    cw_in = Source('cooling water')
    o2 = Sink('oxygen sink')
    h2 = Sink('hydrogen sink')
    cw_out = Sink('cooling water sink')
    self.instance.set_attr(pr=0.99, eta=1)
    cw_el = Connection(cw_in, 'out1', self.instance, 'in1',
                       fluid={'H2O': 1, 'H2': 0, 'O2': 0}, T=20, p=1)
    el_cw = Connection(self.instance, 'out1', cw_out, 'in1', T=45)
    self.nw.add_conns(cw_el, el_cw)
    fw_el = Connection(fw, 'out1', self.instance, 'in2', label='h2o')
    el_o2 = Connection(self.instance, 'out2', o2, 'in1')
    el_h2 = Connection(self.instance, 'out3', h2, 'in1', label='h2')
    self.nw.add_conns(fw_el, el_o2, el_h2)