add namespace name accessor on dependency model

src/Bartlett/Reflect/Model/DependencyModel.php

@@ -82,6 +82,19 @@ public function getName()
         return $this->name;
     }
 
+    /**
+     * Gets the namespace name.
+     *
+     * @return string
+     */
+    public function getNamespaceName()
+    {
+        $parts     = explode('\\', $this->getName());
+        $className = array_pop($parts);
+
+        return implode('\\', $parts);
+    }
+
     /**
      * Gets the arguments list of an internal function.
      *

tests/Model/DependencyModelTest.php

@@ -143,6 +143,23 @@ public function testNameAccessor()
         );
     }
 
+    /**
+     * Tests the namespace name accessor.
+     *
+     *  covers DependencyModel::getNamespaceName
+     * @return void
+     */
+    public function testNamespaceNameAccessor()
+    {
+        $d = 0;  // DateTime::diff
+
+        $this->assertEquals(
+            '',
+            self::$dependencies[$d]->getNamespaceName(),
+            self::$dependencies[$d]->getName() . ' namespace does not match.'
+        );
+    }
+
     /**
      * Tests if the dependency is a class method.
      *