Where the Chicago Housing Authority only encouraged private building owners to conduct annual drug testing of residents, the tests did not violate the Fourth Amendment.The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge Sharon Johnson Coleman.Joseph Perry was one of several plaintiffs who sued the Chicago Housing Authority. Perry and his co-plaintiffs were residents of buildings in Chicago that are privately owned.Perry and the others received housing vouchers from CHA to enable them to rent …