add test for server exceptions

Author: josler

tests/Intercom/Exception/IntercomExceptionTest.php

@@ -18,4 +18,19 @@ public function test404Exception()
             $this->assertEquals('No such user with id[123456]', $errors[0]['message'] );
         }
     }
-}
+
+    public function test503Exception()
+    {
+        try {
+            $this->setMockResponse($this->client, 'Error/Error503.txt');
+            $response = $this->client->getUser(['id' => '123456']);
+            $this->fail('An Exception\ClientErrorResponseException for a 503 response should have been raised');
+        }
+        catch (Exception\ServerErrorResponseException $expected) {
+            $errors = $expected->getErrors();
+            $this->assertEquals(1, count($errors));
+            $this->assertEquals('service_unavailable', $errors[0]['code'] );
+            $this->assertEquals('Sorry, the API service is temporarily unavailable', $errors[0]['message'] );
+        }
+    }
+}

tests/Mock/Error/Error503.txt

@@ -0,0 +1,13 @@
+HTTP/1.1 503 Service Unavailable
+Content-Type: application/json; charset=utf-8
+Date: Mon, 25 Aug 2014 23:57:54 GMT
+
+{
+    "type": "error.list",
+    "errors": [
+        {
+            "code": "service_unavailable",
+            "message": "Sorry, the API service is temporarily unavailable"
+        }
+    ]
+}