test: API Empty TX Object Response

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## Unreleased
 
+- use "statusCode" '422' to test API Post response for empty Transactions objects.
+
 ## [1.2.0] - 2019-02-16
 ## [1.2.0-arduino] - 2019-02-16
 

test/http/http.cpp

@@ -59,7 +59,7 @@ TEST(api, test_http_post_json) { // NOLINT
 
     // Test JSON object for the "message" key.
     // The correct response will include the following
-    ASSERT_STREQ("child \"transactions\" fails because [\"transactions\" must contain at least 1 items]", obj["message"]);
+    ASSERT_EQ(422, obj["statusCode"]);
 }
 
 // This tests the use of "http://" in single-line HTTP requests.