add support for testing with graphql fragments

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

@@ -17,6 +17,9 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import java.util.ArrayList;
+import java.util.List;
+
 @RunWith(SpringRunner.class)
 @GraphQLTest
 public class GraphQLToolsSampleApplicationTest {
@@ -33,6 +36,16 @@ public void get_comments() throws IOException {
         assertEquals("1", response.get("$.data.post.id"));
     }
 
+    @Test
+    public void get_comments_withFragments() throws IOException {
+        List<String> fragments = new ArrayList<>();
+        fragments.add("graphql/all-comment-fields-fragment.graphql");
+        GraphQLResponse response = graphQLTestTemplate.postForResource("graphql/post-get-comments-with-fragment.graphql", fragments);
+        assertNotNull(response);
+        assertTrue(response.isOk());
+        assertEquals("1", response.get("$.data.post.id"));
+    }
+
     @Test
     public void create_post() throws IOException {
         ObjectNode variables = new ObjectMapper().createObjectNode();

example-graphql-tools/src/test/resources/graphql/all-comment-fields-fragment.graphql

@@ -0,0 +1,4 @@
+fragment AllCommentFields on Comment {
+    id
+    description
+}

example-graphql-tools/src/test/resources/graphql/post-get-comments-with-fragment.graphql

@@ -0,0 +1,8 @@
+query {
+    post(id: "1") {
+        id
+        comments {
+            ...AllCommentFields
+        }
+    }
+}

graphql-spring-boot-test/src/main/java/com/graphql/spring/boot/test/GraphQLTestTemplate.java

@@ -17,6 +17,7 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
+import java.util.List;
 
 public class GraphQLTestTemplate {
 
@@ -93,6 +94,16 @@ public GraphQLResponse perform(String graphqlResource, ObjectNode variables) thr
         return post(payload);
     }
 
+    public GraphQLResponse perform(String graphqlResource, ObjectNode variables, List<String> fragmentResources) throws IOException {
+        StringBuilder sb = new StringBuilder();
+        for (String fragmentResource : fragmentResources) {
+            sb.append(loadQuery(fragmentResource));
+        }
+        String graphql = sb.append(loadQuery(graphqlResource)).toString();
+        String payload = createJsonQuery(graphql, variables);
+        return post(payload);
+    }
+
     /**
      * Loads a GraphQL query from the given classpath resource and sends it to the GraphQL server.
      *
@@ -104,6 +115,19 @@ public GraphQLResponse postForResource(String graphqlResource) throws IOExceptio
         return perform(graphqlResource, null);
     }
 
+    /**
+     * Loads a GraphQL query from the given classpath resource, appending any graphql fragment
+     * resources provided  and sends it to the GraphQL server.
+     *
+     * @param graphqlResource path to the classpath resource containing the GraphQL query
+     * @param fragmentResources an ordered list of classpaths containing GraphQL fragment definitions.
+     * @return GraphQLResponse containing the result of query execution
+     * @throws IOException if the resource cannot be loaded from the classpath
+     */
+    public GraphQLResponse postForResource(String graphqlResource, List<String> fragmentResources) throws IOException {
+        return perform(graphqlResource, null, fragmentResources);
+    }
+
     public GraphQLResponse postMultipart(String query, String variables) {
         return postRequest(RequestFactory.forMultipart(query, variables, headers));
     }
@@ -117,4 +141,4 @@ private GraphQLResponse postRequest(HttpEntity<Object> request) {
         return new GraphQLResponse(response);
     }
 
-}
+}