phpunit-mock-object 2.3.5-1 (amd64 binary) in ubuntu xenial

 PHPUnit_MockObject is a PHPUnit extension that provides Mock Objects for
 PHPUnit.
 .
 According to the PHPUnit manual "The practice of replacing an object
 with a test double that verifies expectations, for instance asserting
 that a method has been called, is refered to as mocking.".
 .
 PHPUnit is a unit testing suite for the PHP language, modelled on the xUnit
 testing framework.