Added support for nested fragments when importing from graphql/loader

src/index.js

@@ -1,6 +1,7 @@
 var parser = require('graphql/language/parser');
-
+var printer = require('graphql/language/printer');
 var parse = parser.parse;
+var print = printer.print;
 
 // Strip insignificant whitespace
 // Note that this could do a lot more, such as reorder fields etc.
@@ -159,7 +160,7 @@ function gql(/* arguments */) {
 
   for (var i = 1; i < args.length; i++) {
     if (args[i] && args[i].kind && args[i].kind === 'Document') {
-      result += args[i].loc.source.body;
+      result += print(args[i]);
     } else {
       result += args[i];
     }

test/graphql.js

@@ -210,6 +210,37 @@ const assert = require('chai').assert;
       assert.equal(definitions[1].kind, 'FragmentDefinition');
     });
 
+    it('correctly interpolates imports of other files through the webpack loader', () => {
+      const query = `#import "./fragment_definition.graphql"
+          fragment BooksAuthor on Book {
+            author {
+              ...authorDetails
+            }
+          }
+        `;
+      const jsSource = loader.call({ cacheable() {} }, query);
+
+      const oldRequire = require;
+      const module = { exports: undefined };
+      const require = (path) => {
+        assert.equal(path, './fragment_definition.graphql');
+        return gql`
+          fragment authorDetails on Author {
+            firstName
+            lastName
+          }`;
+      };
+
+      eval(jsSource);
+
+      const document = gql`query { ...BooksAuthor } ${module.exports}`;
+      assert.equal(document.kind, 'Document');
+      assert.equal(document.definitions.length, 3);
+      assert.equal(document.definitions[0].kind, 'OperationDefinition');
+      assert.equal(document.definitions[1].kind, 'FragmentDefinition');
+      assert.equal(document.definitions[2].kind, 'FragmentDefinition');
+    });
+
     it('tracks fragment dependencies across fragments loaded via the webpack loader', () => {
       const query = `#import "./fragment_definition.graphql"
         fragment F111 on F {