### Question:
ASTDbIdPath extends ASTDbPath { @Override public Expression shallowCopy() { ASTDbIdPath copy = new ASTDbIdPath(id); copy.path = path; return copy; } ASTDbIdPath(int id);  ASTDbIdPath();  ASTDbIdPath(Object value); @Override Expression shallowCopy(); @Override int getType(); @Override void appendAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId); @Override void appendAsString(Appendable out); static final String DBID_PREFIX; }### Answer:
@Test public void testShallowCopy() { ASTDbIdPath path = new ASTDbIdPath("test"); Expression exp = path.shallowCopy(); assertEquals(exp.getType(), Expression.DBID_PATH); assertThat(exp, instanceOf(ASTDbIdPath.class)); ASTDbIdPath clone = (ASTDbIdPath)exp; assertEquals("test", clone.getPath()); }