assertEquals(0, PermissionUtil.getNumPermissions(getPrincipalRoot(testPrincipalName)));
assertEquals(2, PermissionUtil.getNumPermissions(getPrincipalRoot(EveryonePrincipal.NAME)));
acl = AccessControlUtils.getAccessControlList(acMgr, childPath);
acl.removeAccessControlEntry(acl.getAccessControlEntries()[0]);
acMgr.setPolicy(childPath, acl);
root.commit();
assertEquals(0, PermissionUtil.getNumPermissions(getPrincipalRoot(testPrincipalName)));
assertEquals(1, PermissionUtil.getNumPermissions(getPrincipalRoot(EveryonePrincipal.NAME)));