### Question:
PrefetchTreeNode implements Serializable, XMLSerializable { public String getPath() { return getPath(null); } PrefetchTreeNode(); protected  PrefetchTreeNode(PrefetchTreeNode parent, String name); static PrefetchTreeNode withPath(String path, int semantics); @Override void encodeAsXML(XMLEncoder encoder, ConfigurationNodeVisitor delegate); PrefetchTreeNode getRoot(); String getPath(); String getPath(PrefetchTreeNode upTillParent); Collection<PrefetchTreeNode> adjacentJointNodes(); Collection<PrefetchTreeNode> jointNodes(); Collection<PrefetchTreeNode> disjointNodes(); Collection<PrefetchTreeNode> disjointByIdNodes(); Collection<PrefetchTreeNode> nonPhantomNodes(); PrefetchTreeNode cloneJointSubtree(); void traverse(PrefetchProcessor processor); PrefetchTreeNode getNode(String path); PrefetchTreeNode addPath(String path); void merge(PrefetchTreeNode node); void removePath(String path); void addChild(PrefetchTreeNode child); void removeChild(PrefetchTreeNode child); PrefetchTreeNode getParent(); Collection<PrefetchTreeNode> getChildren(); boolean hasChildren(); String getName(); boolean isPhantom(); void setPhantom(boolean phantom); int getSemantics(); void setSemantics(int semantics); boolean isJointPrefetch(); boolean isDisjointPrefetch(); boolean isDisjointByIdPrefetch(); String getEjbqlPathEntityId(); void setEjbqlPathEntityId(String ejbqlPathEntityId); String getEntityName(); void setEntityName(String entityName); static final int UNDEFINED_SEMANTICS; static final int JOINT_PREFETCH_SEMANTICS; static final int DISJOINT_PREFETCH_SEMANTICS; static final int DISJOINT_BY_ID_PREFETCH_SEMANTICS; }### Answer:
@Test public void testGetPath() { PrefetchTreeNode tree = new PrefetchTreeNode(); tree.addPath("abc"); tree.addPath("abc.def.mnk"); tree.addPath("xyz"); assertEquals("", tree.getPath()); PrefetchTreeNode n1 = tree.getNode("abc"); assertEquals("abc", n1.getPath()); PrefetchTreeNode n2 = tree.getNode("abc.def"); assertEquals("abc.def", n2.getPath()); PrefetchTreeNode n3 = tree.getNode("abc.def.mnk"); assertEquals("abc.def.mnk", n3.getPath()); PrefetchTreeNode n4 = tree.getNode("xyz"); assertEquals("xyz", n4.getPath()); }