Add test for list data resolver

test/test_data_resolver.py

@@ -116,4 +116,22 @@ class TestResolve(unittest.TestCase):
         self.assertEqual(captions, ['caption for test1', 'caption for test2', 'test3'])
         
         undersized_images = list(filter(lambda i: i.is_undersized, items))
-        self.assertEqual(len(undersized_images), 1)
+        self.assertEqual(len(undersized_images), 1)
+        
+    def test_resolve_with_list(self):
+        data_root_spec = [
+            DATA_PATH,
+            JSON_ROOT_PATH,
+        ]
+        
+        items = resolver.resolve(data_root_spec, ARGS)
+        image_paths = [item.pathname for item in items]
+        image_captions = [item.caption for item in items]
+        captions = [caption.get_caption() for caption in image_captions]
+        
+        self.assertEqual(len(items), 6)
+        self.assertEqual(image_paths, [IMAGE_1_PATH, IMAGE_2_PATH, IMAGE_3_PATH] * 2)
+        self.assertEqual(captions, ['caption for test1', 'test2', 'test3', 'caption for test1', 'caption for test2', 'test3'])
+        
+        undersized_images = list(filter(lambda i: i.is_undersized, items))
+        self.assertEqual(len(undersized_images), 2)