Add additional test for read/write and remove destroy.

With CookieComponent managing multiple cookies, the destroy() method
would simply be an alias for delete() which is not useful.

src/Controller/Component/CookieComponent.php

@@ -266,33 +266,6 @@ public function delete($key) {
 		}
 	}
 
-/**
- * Destroy current cookie
- *
- * You must use this method before any output is sent to the browser.
- * Failure to do so will result in header already sent errors.
- *
- * @return void
- * @link http://book.cakephp.org/2.0/en/core-libraries/components/cookie.html#CookieComponent::destroy
- */
-	public function destroy() {
-		$cookieName = $this->config('name');
-		if (empty($this->_values[$cookieName])) {
-			$this->read();
-		}
-
-		foreach ($this->_values[$cookieName] as $name => $value) {
-			if (is_array($value)) {
-				foreach ($value as $key => $val) {
-					unset($this->_values[$cookieName][$name][$key]);
-					$this->_delete("[$name][$key]");
-				}
-			}
-			unset($this->_values[$cookieName][$name]);
-			$this->_delete("[$name]");
-		}
-	}
-
 /**
  * Get / set encryption type. Use this method in ex: AppController::beforeFilter()
  * before you have read or written any cookies.

tests/TestCase/Controller/Component/CookieComponentTest.php

@@ -194,6 +194,19 @@ public function testWriteSimple() {
 		$this->assertEquals('value', $result);
 	}
 
+/**
+ * Test writes don't omit request data from being read.
+ *
+ * @return void
+ */
+	public function testWriteThanRead() {
+		$this->request->cookies = [
+			'User' => ['name' => 'mark']
+		];
+		$this->Cookie->write('Testing', 'value');
+		$this->assertEquals('mark', $this->Cookie->read('User.name'));
+	}
+
 /**
  * test write() encrypted data with falsey value
  *