Added a GraphQLResponse return object for GraphQLTestUtils perform

This will allow for future updates to that response type, e.g. in line
with (ResultActions)[https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/test/web/servlet/ResultActions.html]. This will allow more fluid checks of the json
response instead of having to manually traverse the `JsonNode` tree.
The only reason for this return object at this stage is to prepare the
public API for those additional features in the future.

Author: oliemansm

example-graphql-tools/src/main/java/com/oembedler/moon/graphql/boot/resolvers/Post.java

@@ -1,6 +1,6 @@
 package com.oembedler.moon.graphql.boot.resolvers;
 
-class Post {
+public class Post {
 
     private Long id;
     private String text;
@@ -9,6 +9,10 @@ class Post {
         this.id = id;
     }
 
+    public Long getId() {
+        return id;
+    }
+
     public String getText() {
       return text;
     }

example-graphql-tools/src/test/java/com/oembedler/moon/graphql/boot/GraphQLToolsSampleApplicationTest.java

@@ -1,9 +1,11 @@
 package com.oembedler.moon.graphql.boot;
 
-import com.oembedler.moon.graphql.testing.GraphQLTestUtils;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.oembedler.moon.graphql.boot.resolvers.Post;
+import com.oembedler.moon.graphql.testing.GraphQLResponse;
+import com.oembedler.moon.graphql.testing.GraphQLTestUtils;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -24,7 +26,9 @@ public class GraphQLToolsSampleApplicationTest {
 
     @Test
     public void get_comments() throws IOException {
-        JsonNode parsedResponse = graphQLTestUtils.perform("graphql/post-get-comments.graphql");
+        GraphQLResponse response = graphQLTestUtils.perform("graphql/post-get-comments.graphql");
+        assertNotNull(response);
+        JsonNode parsedResponse = response.readTree();
         assertNotNull(parsedResponse);
         assertNotNull(parsedResponse.get("data"));
         assertNotNull(parsedResponse.get("data").get("post"));
@@ -35,11 +39,13 @@ public void get_comments() throws IOException {
     public void create_post() throws IOException {
         ObjectNode variables = new ObjectMapper().createObjectNode();
         variables.put("text", "lorem ipsum dolor sit amet");
-        JsonNode parsedResponse = graphQLTestUtils.perform("graphql/create-post.graphql",variables);
+        GraphQLResponse response = graphQLTestUtils.perform("graphql/create-post.graphql", variables);
+        assertNotNull(response);
+        JsonNode parsedResponse = response.readTree();
         assertNotNull(parsedResponse);
         assertNotNull(parsedResponse.get("data"));
         assertNotNull(parsedResponse.get("data").get("createPost"));
-        assertNotNull(parsedResponse.get("data").get("createPost").get("id").asText());
+        assertNotNull(parsedResponse.get("data").get("createPost").get("id"));
     }
 
 }

graphql-spring-boot-starter-test/src/main/java/com/oembedler/moon/graphql/testing/GraphQLResponse.java

@@ -0,0 +1,24 @@
+package com.oembedler.moon.graphql.testing;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.http.ResponseEntity;
+
+import java.io.IOException;
+import java.util.Objects;
+
+public class GraphQLResponse {
+
+    private ResponseEntity<String> responseEntity;
+    private ObjectMapper mapper;
+
+    public GraphQLResponse(ResponseEntity<String> responseEntity) {
+        this.responseEntity = Objects.requireNonNull(responseEntity);
+        this.mapper = new ObjectMapper();
+    }
+
+    public JsonNode readTree() throws IOException {
+        return mapper.readTree(responseEntity.getBody());
+    }
+
+}

graphql-spring-boot-starter-test/src/main/java/com/oembedler/moon/graphql/testing/GraphQLTestUtils.java

@@ -37,10 +37,6 @@ private String createJsonQuery(String graphql, ObjectNode variables)
         return objectMapper.writeValueAsString(wrapper);
     }
 
-    private JsonNode parse(String payload) throws IOException {
-        return objectMapper.readTree(payload);
-    }
-
     private String loadQuery(String location) throws IOException {
         Resource resource = resourceLoader.getResource("classpath:" + location);
         return loadResource(resource);
@@ -52,11 +48,11 @@ private String loadResource(Resource resource) throws IOException {
         }
     }
 
-    public JsonNode perform(String graphqlResource) throws IOException {
+    public GraphQLResponse perform(String graphqlResource) throws IOException {
         return perform(graphqlResource,null);
     }
 
-    public JsonNode perform(String graphqlResource, ObjectNode variables) throws IOException {
+    public GraphQLResponse perform(String graphqlResource, ObjectNode variables) throws IOException {
         String graphql = loadQuery(graphqlResource);
         String payload = createJsonQuery(graphql,variables);
 
@@ -66,7 +62,7 @@ public JsonNode perform(String graphqlResource, ObjectNode variables) throws IOE
         HttpEntity<String> httpEntity = new HttpEntity<>(payload, headers);
         ResponseEntity<String> response = restTemplate.exchange("/graphql", HttpMethod.POST, httpEntity, String.class);
 
-        return parse(response.getBody());
+        return new GraphQLResponse(response);
     }
 
 }