add test for removeTag()

Author: TomasVotruba

tests/unit/DocBlockTest.php

@@ -262,11 +262,16 @@ public function testDocBlockKnowsIfItIsTheEndOfADocBlockTemplate()
     public function testRemoveTag()
     {
         $someTag = new Deprecated();
+        $anotherTag = new Deprecated();
 
         $fixture = new DocBlock('', null, [$someTag]);
 
         $this->assertCount(1, $fixture->getTags());
 
+        $fixture->removeTag($anotherTag);
+
+        $this->assertCount(1, $fixture->getTags());
+
         $fixture->removeTag($someTag);
 
         $this->assertCount(0, $fixture->getTags());