### Question:
Connection implements Serializable { public final Neuron getFromNeuron() { return fromNeuron; } Connection(Neuron fromNeuron, Neuron toNeuron);  Connection(Neuron fromNeuron, Neuron toNeuron, Weight weight);  Connection(Neuron fromNeuron, Neuron toNeuron, double weightVal); final Weight getWeight(); final void setWeight(Weight weight); double getInput(); final double getWeightedInput(); final Neuron getFromNeuron(); final Neuron getToNeuron(); @Override Object clone(); @Override int hashCode(); @Override boolean equals(Object obj); @Override String toString();  }### Answer:
@Test public void testGetFromNeuron() { Connection instance = new Connection(fromNeuron, toNeuron); Neuron expResult = fromNeuron; Neuron result = instance.getFromNeuron(); assertEquals(expResult, result); }
@Test public void testSetFromNeuron() { Connection instance = new Connection(fromNeuron, toNeuron); assertEquals(fromNeuron, instance.getFromNeuron()); }