- added array implementation to ReadWrite document

- updated ReadWrite document unittest

library/Solarium/Client/Adapter/ZendHttp.php

@@ -86,8 +86,7 @@ class Solarium_Client_Adapter_ZendHttp extends Solarium_Client_Adapter_Http
             );
 
             // forward adapter options if available
-            if( isset($this->_options['adapteroptions']))
-            {
+            if (isset($this->_options['adapteroptions'])) {
                 $this->_zendHttp->setConfig($this->_options['adapteroptions']);
             }
         }

library/Solarium/Document/ReadWrite.php

@@ -202,13 +202,19 @@ class Solarium_Document_ReadWrite extends Solarium_Document_ReadOnly
      * Magic method for setting fields as properties of this document
      * object, by field name.
      *
+     * If you supply NULL as the value the field will be removed
+     *
      * @param string $name
-     * @param string $value
+     * @param string|null $value
      * @return void
      */
     public function __set($name, $value)
     {
+        if ($value == null) {
+            $this->removeField($name);
+        } else {
             $this->setField($name, $value);
         }
+    }
 
 }
\ No newline at end of file

tests/Solarium/Document/ReadWriteTest.php

@@ -141,6 +141,19 @@ class Solarium_Document_ReadWriteTest extends PHPUnit_Framework_TestCase
         );
     }
 
+    public function testRemoveFieldBySettingToNull()
+    {
+        $this->_doc->setField('name', NULL);
+
+        $expectedFields = $this->_fields;
+        unset($expectedFields['name']);
+
+        $this->assertEquals(
+            $expectedFields,
+            $this->_doc->getFields()
+        );
+    }
+
     public function testRemoveFieldBoostRemoval()
     {
         $this->_doc->setFieldBoost('name',3.2);
@@ -199,4 +212,30 @@ class Solarium_Document_ReadWriteTest extends PHPUnit_Framework_TestCase
         );
     }
 
+    public function testSetFieldAsArray()
+    {
+        $this->_doc['name'] = 'newname';
+
+        $expectedFields = $this->_fields;
+        $expectedFields['name'] = 'newname';
+
+        $this->assertEquals(
+            $expectedFields,
+            $this->_doc->getFields()
+        );
+    }
+
+    public function testRemoveFieldAsArray()
+    {
+        unset($this->_doc['name']);
+
+        $expectedFields = $this->_fields;
+        unset($expectedFields['name']);
+
+        $this->assertEquals(
+            $expectedFields,
+            $this->_doc->getFields()
+        );
+    }
+    
 }