def test_connection_adds_to_incoming_and_outgoing_arrays(self):
     neuron = Neuron(input=0)
     neuron_2 = Neuron()
     neuron.connect_child(neuron_2, weight=1)
     # Make sure there's only one connection back and forth
     assert [neuron == connection.neuron for connection in neuron_2.incoming].count(True) == 1
     assert [neuron_2 == connection.neuron for connection in neuron.outgoing].count(True) == 1
 def test_activate_applies_proper_math_over_many_neurons(self):
     neuron = Neuron(input=0)
     neuron_2 = Neuron()
     neuron.connect_child(neuron_2, weight=1)
     neuron_2.activate()
     # sucks comparing floats in python apparently, absolute difference check
     assert abs(neuron_2.output - 0.622459331202) < 0.000000001