public function testTagNullValueEscaping()
{
$expected = 'instance,null_tag=null,value_tag=value cpucount=10i,free=1i,test="string",bool=false,value=1.11';
$point = $this->getPoint(null);
$point->setTags(['null_tag' => null, 'value_tag' => 'value']);
$this->assertEquals($expected, (string) $point);
}