/** * @covers ::newRandomKeyUnique */ public function testNewRandomKeyUnique() { Test2::$newRandomKey = ['new-key', 'existing-key', 'existing-key2', 'existing-key3', 'agian-key']; $this->assertEquals('new-key', Test2::newRandomKeyUnique()); $this->assertEquals('agian-key', Test2::newRandomKeyUnique()); }