// check if $a is greater than $b public function testAssertGreaterThan(){ $a = 5; $b = 2; $this->assertGreaterThan($a, $b); }In this example, the assertGreaterThan method will pass the test because 5 is greater than 2. This method is part of the PHPUnit_Framework_Assert class, which is part of the PHPUnit testing framework. Therefore, the package library for this method is PHPUnit.