def test_workforce(self):
        orga = Organization()
        orga.add_layer(1, size=2, efficiency_weight=1.0)
        orga.add_layer(2, size=3, efficiency_weight=1.0)
        orga.add_layer(3, size=5, efficiency_weight=1.0)

        self.assertEquals(10, orga.workforce())
    def test_global_efficiency(self):
        orga = Organization()
        orga.add_layer(1, size=2, efficiency_weight=1.0)
        orga.add_layer(2, size=3, efficiency_weight=0.6)
        orga.add_layer(3, size=5, efficiency_weight=0.2)

        orga.layers[1].employees = [emp(25, 8.0), emp(25, 9.0)]
        orga.layers[2].employees = [emp(25, 7.0), emp(25, 2.0), emp(25, 7.0)]
        orga.layers[3].employees = [emp(25, 6.0), emp(25, 5.5), emp(25, 10.0), None, emp(25, 7.0)]

        self.assertEquals(100 * ((8.0 + 9.0) * 1.0 + (7.0 + 2.0 + 7.0) * 0.6 + (6.0 + 5.5 + 10.0 + 7.0) * 0.2) /
                                 (orga.workforce() * orga.maximum_efficiency()),
                          orga.global_efficiency())