Add custom message to response code assertions

It would be nice to be able to pass in a custom message to the response code convenience methods.  Especially since it is already supported in the protected method _assertStatus.

src/TestSuite/IntegrationTestCase.php

@@ -702,39 +702,51 @@ public function viewVariable($name)
      *
      * @return void
      */
-    public function assertResponseOk()
+    public function assertResponseOk($message)
     {
-        $this->_assertStatus(200, 204, 'Status code is not between 200 and 204');
+        if (empty($message)) {
+            $message = 'Status code is not between 200 and 204';
+        }
+        $this->_assertStatus(200, 204, $message);
     }
 
     /**
      * Asserts that the response status code is in the 2xx/3xx range.
      *
      * @return void
      */
-    public function assertResponseSuccess()
+    public function assertResponseSuccess($message)
     {
-        $this->_assertStatus(200, 308, 'Status code is not between 200 and 308');
+        if (empty($message)) {
+            $message = 'Status code is not between 200 and 308';
+        }
+        $this->_assertStatus(200, 308, $message);
     }
 
     /**
      * Asserts that the response status code is in the 4xx range.
      *
      * @return void
      */
-    public function assertResponseError()
+    public function assertResponseError($message)
     {
-        $this->_assertStatus(400, 429, 'Status code is not between 400 and 429');
+        if (empty($message)) {
+            $message = 'Status code is not between 400 and 429';
+        }
+        $this->_assertStatus(400, 429, $message);
     }
 
     /**
      * Asserts that the response status code is in the 5xx range.
      *
      * @return void
      */
-    public function assertResponseFailure()
+    public function assertResponseFailure($message)
     {
-        $this->_assertStatus(500, 505, 'Status code is not between 500 and 505');
+        if (empty($message)) {
+            $message = 'Status code is not between 500 and 505';
+        }
+        $this->_assertStatus(500, 505, $message);
     }
 
     /**
@@ -743,10 +755,15 @@ public function assertResponseFailure()
      * @param int $code Status code to assert.
      * @return void
      */
-    public function assertResponseCode($code)
+    public function assertResponseCode($code, $message)
     {
         $actual = $this->_response->getStatusCode();
-        $this->_assertStatus($code, $code, 'Status code is not ' . $code . ' but ' . $actual);
+
+        if (empty($message)) {
+            $message = 'Status code is not ' . $code . ' but ' . $actual;
+        }
+
+        $this->_assertStatus($code, $code, $message);
     }
 
     /**