public function testStaticCache()
{
$this->insert(1, 200);
PersonalBest::activateStaticCache();
$PB = new PersonalBest(1, $this->PDO, true);
$this->assertEquals(200, $PB->seconds());
$this->insert(1, 180);
$this->assertEquals(200, $PB->lookup()->seconds());
PersonalBest::deactivateStaticCache();
$this->assertEquals(180, $PB->lookup()->seconds());
}