refactoring tests after Coqpit

tests/test_loader.py

@@ -10,13 +10,17 @@ from tests import get_tests_input_path, get_tests_output_path
 from TTS.tts.datasets import TTSDataset
 from TTS.tts.datasets.preprocess import ljspeech
 from TTS.utils.audio import AudioProcessor
-from TTS.utils.io import load_config
+from TTS.tts.configs import BaseTTSConfig
 
 # pylint: disable=unused-variable
 
 OUTPATH = os.path.join(get_tests_output_path(), "loader_tests/")
 os.makedirs(OUTPATH, exist_ok=True)
-c = load_config(os.path.join(get_tests_input_path(), "test_config.json"))
+
+# create a dummy config for testing data loaders.
+c = BaseTTSConfig(text_cleaner='english_cleaners', num_loader_workers=0, batch_size=2)
+c.r = 5
+c.data_path = "tests/data/ljspeech/"
 ok_ljspeech = os.path.exists(c.data_path)
 
 DATA_EXIST = True
@@ -40,7 +44,7 @@ class TestTTSDataset(unittest.TestCase):
             compute_linear_spec=True,
             ap=self.ap,
             meta_data=items,
-            tp=c.characters if "characters" in c.keys() else None,
+            tp=c.characters,
             batch_group_size=bgs,
             min_seq_len=c.min_seq_len,
             max_seq_len=float("inf"),