From 0703555998b94ab83434cf8a919150818139b487 Mon Sep 17 00:00:00 2001
From: David Buchmann <david.buchmann@liip.ch>
Date: Fri, 8 May 2015 10:27:31 +0200
Subject: [PATCH] Adding TagHandler::hasTags method

---
 src/Handler/TagHandler.php            | 14 ++++++++++++--
 tests/Unit/Handler/TagHandlerTest.php |  2 ++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/Handler/TagHandler.php b/src/Handler/TagHandler.php
index 6aa506ec..cf03cd63 100644
--- a/src/Handler/TagHandler.php
+++ b/src/Handler/TagHandler.php
@@ -77,9 +77,19 @@ public function getTagsHeaderValue()
     }
 
     /**
-     * Add tags to be sent.
+     * Check whether the tag handler has any tags to set on the response.
      *
-     * This must be called before any response is sent to the client.
+     * @return bool True if this handler will set at least one tag.
+     */
+    public function hasTags()
+    {
+        return 0 < count($this->tags);
+    }
+
+    /**
+     * Add tags to be set on the response.
+     *
+     * This must be called before any HTTP response is sent to the client.
      *
      * @param array $tags List of tags to add.
      *
diff --git a/tests/Unit/Handler/TagHandlerTest.php b/tests/Unit/Handler/TagHandlerTest.php
index f21b4781..ac56be2e 100644
--- a/tests/Unit/Handler/TagHandlerTest.php
+++ b/tests/Unit/Handler/TagHandlerTest.php
@@ -90,7 +90,9 @@ public function testTagResponse()
             ->getMock();
 
         $tagHandler = new TagHandler($cacheInvalidator);
+        $this->assertFalse($tagHandler->hasTags());
         $tagHandler->addTags(array('post-1', 'test,post'));
+        $this->assertTrue($tagHandler->hasTags());
         $this->assertEquals('post-1,test_post', $tagHandler->getTagsHeaderValue());
     }
 }