Move current unit tests to integration tests

tests/integration/API/JSON/ErrorResponseTest.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace MailPoet\Test\API\JSON;
+
+use MailPoet\API\JSON\ErrorResponse;
+
+class ErrorResponseTest extends \MailPoetTest {
+  function testItSanitizesSqlErrorsWhenReturningResponse() {
+    $errors = array(
+      'valid error',
+      'SQLSTATE[22001]: Some SQL error',
+      'another valid error'
+    );
+    $error_response = new ErrorResponse($errors);
+    expect($error_response->getData())->equals(
+      array(
+        'errors' => array(
+          array(
+            'error' => 0,
+            'message' => 'valid error'
+          ),
+          array(
+            'error' => 1,
+            'message' => 'An unknown error occurred.'
+          ),
+          array(
+            'error' => 2,
+            'message' => 'another valid error'
+          )
+        )
+      )
+    );
+  }
+}