fix tests

Author: rickwierenga

tensorflow_datasets/image/imagewang_test.py

@@ -12,26 +12,26 @@ class ImagewangFullSizeTest(testing.DatasetBuilderTestCase):
   DATASET_CLASS = imagewang.Imagewang
   BUILDER_CONFIG_NAMES_TO_TEST = ['full-size']
   SPLITS = {
-      "train": 4,
-      "test": 4,
+      "train": 1,
+      "validation": 1,
   }
 
 
 class Imagewang320Test(testing.DatasetBuilderTestCase):
   DATASET_CLASS = imagewang.Imagewang
   BUILDER_CONFIG_NAMES_TO_TEST = ['320px']
   SPLITS = {
-      "train": 4,
-      "test": 4,
+      "train": 1,
+      "validation": 1,
   }
 
 
 class Imagewang160Test(testing.DatasetBuilderTestCase):
   DATASET_CLASS = imagewang.Imagewang
   BUILDER_CONFIG_NAMES_TO_TEST = ['160px']
   SPLITS = {
-      "train": 4,
-      "test": 4,
+      "train": 1,
+      "validation": 1,
   }