Added support for calculated size for Azure Blob Storage

src/Gaufrette/Adapter/AzureBlobStorage.php

@@ -20,7 +20,9 @@
  * @author Paweł Czyżewski <[email protected]>
  */
 class AzureBlobStorage implements Adapter,
-                                  MetadataSupporter
+                                  MetadataSupporter,
+                                  SizeCalculator
+
 {
     /**
      * Error constants.
@@ -306,6 +308,26 @@ public function mtime($key)
         }
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function size($key)
+    {
+        $this->init();
+        list($containerName, $key) = $this->tokenizeKey($key);
+
+        try {
+            $properties = $this->blobProxy->getBlobProperties($containerName, $key);
+
+            return $properties->getProperties()->getContentLength();
+        } catch (ServiceException $e) {
+            $this->failIfContainerNotFound($e, sprintf('read content length for key "%s"', $key), $containerName);
+
+            return false;
+        }
+
+    }
+
     /**
      * {@inheritdoc}
      * @throws \RuntimeException

tests/Gaufrette/Functional/Adapter/AzureMultiContainerBlobStorageTest.php

@@ -95,6 +95,19 @@ public function shouldGetMtime()
         $this->assertGreaterThan(0, $this->filesystem->mtime($path));
     }
 
+    /**
+     * @test
+     * @group functional
+     */
+    public function shouldGetSize()
+    {
+        $path = $this->createUniqueContainerName('container') . '/foo';
+
+        $this->filesystem->write($path, 'Some content');
+
+        $this->assertGreaterThan(11, $this->filesystem->size($path));
+    }
+
     /**
      * @test
      * @group functional