@Test
public void returnsConnectionBetweenTwoLayers() {
Set<Layer> layers = new HashSet<Layer>();
Layer topLayer = new Layer();
Layer middleLayer = new Layer();
Connections firstConnection = new FullyConnected(topLayer, middleLayer, 0, 0);
topLayer.addConnection(firstConnection);
layers.add(topLayer);
layers.add(middleLayer);
network.setLayers(layers);
assertEquals(firstConnection, network.getConnection(topLayer, middleLayer));
assertEquals(firstConnection, network.getConnection(middleLayer, topLayer));
}
@Test
public void returnsNullWhenThereIsntAConnectingLayer() {
Set<Layer> layers = new HashSet<Layer>();
Layer topLayer = new Layer();
Layer middleLayer = new Layer();
Layer bottomLayer = new Layer();
Connections firstConnection = new FullyConnected(topLayer, middleLayer, 0, 0);
topLayer.addConnection(firstConnection);
layers.add(topLayer);
layers.add(middleLayer);
network.setLayers(layers);
assertNull(network.getConnection(topLayer, bottomLayer));
assertNull(network.getConnection(bottomLayer, topLayer));
}