Joltin’ Joe Biden warned that Obama would be tested; now it’s China’s turn.

WASHINGTON  — The Pentagon charged Monday that five Chinese ships shadowed and maneuvered dangerously close to a U.S. Navy vessel in an apparent attempt to harass the American crew.

Defense officials in the Obama administration said the incident Sunday followed several days of “increasingly aggressive” acts by Chinese ships in the region. The incident took place in international waters in the South China Sea, about 75 miles south of Hainan Island.

U.S. officials said a protest was lodged with the Chinese government over the weekend and it was to be repeated to a Beijing military attache at a Pentagon meeting Monday.

The USNS Impeccable sprayed one ship with water from fire hoses to force it away. Despite the force of the water, Chinese crew members stripped to their underwear and continued closing within 25 feet, the Defense Department said.