public void testInitFromUniverse() {
BasicUniverse3D universe3D = new BasicUniverse3D(new Universe3DState(), new MockUniverse());
Universe universe = new MockUniverse();
MockTreeLeaf treeLeaf = new MockTreeLeaf();
treeLeaf.setState(CoreDataCreatorForTests.createSpecificTreeLeafState());
universe.addFallenLeaf(treeLeaf);
MockTree tree = new MockTree();
tree.setState(CoreDataCreatorForTests.createSpecificTreeState());
universe.addTree(tree);
universe3D.initFromUniverse(universe);