Testing attributes are not there when empty.

TagadelicTag.php

@@ -34,8 +34,10 @@ function __construct($id, $name, $count) {
   public function __ToString() {
     $this->clean();
 
-    $attributes = array("title" => $this->description);
-    if ($this->weight > 0) $attributes["class"] = "weight-3";
+    $attributes = array();
+
+    if (!empty($this->description)) $attributes["title"] = $this->description;
+    if ($this->weight > 0)          $attributes["class"] = "weight-3";
 
     return $this->drupal()->l($this->name, $this->link, $attributes);
   }

tests/TagadelicTagToStringTest.php

@@ -61,12 +61,28 @@ public function test__ToStringHasTitle() {
     $this->object->__tostring();
   }
 
+  /**
+   * @covers tagadelictag::__tostring
+   */
+  public function test__ToStringHasNoTitle() {
+    $this->object->set_description("");
+
+    $this->drupal->expects($this->any())
+        ->method('l')
+        ->with(
+          $this->anything(),
+          $this->anything(),
+          $this->equalto(array()))
+        ->will($this->returnvalue(""));
+
+    $this->object->__tostring();
+  }
   /**
    * @covers tagadelictag::__tostring
    */
   public function test__ToStringHasWeight() {
     $this->object->set_weight(3);
-    $expected_attrs = array("title" => "", "class" => "weight-3");
+    $expected_attrs = array("class" => "weight-3");
 
     $this->drupal->expects($this->any())
         ->method('l')