$tags = $this->linkDB->linksCountPerTag();
$this->assertFalse(isset($tags[$tagName]));
$this->assertTrue($tags[strtolower($tagName)] > 0);
$historyEntry = $this->history->getHistory()[0];
$tags = $this->linkDB->linksCountPerTag();
$this->assertFalse(isset($tags[$tagName]));
$this->assertTrue($tags[strtolower($tagName)] > 0);
$historyEntry = $this->history->getHistory()[0];