adding test file for converter

tests/test_crest.py

@@ -0,0 +1,26 @@
+import os
+import sys
+
+path = os.getcwd()
+sys.path.append('{}/src'.format('/'.join(path.split('/')[:-1])))
+
+import unittest
+from crest import Converter
+
+
+class TestCREST(unittest.TestCase):
+    converter = Converter()
+
+    def test_converter(self):
+        df, mis = self.converter.convert2crest(dataset_ids=[1, 2, 3, 4, 5, 6, 7, 8, 9], save_file=True)
+
+        print("samples: " + str(len(df)))
+        print("+ causal: {}".format(len(df.loc[df["label"] == 1])))
+        print("- non-causal: {}".format(len(df.loc[df["label"] == 0])))
+        print("train: {}".format(len(df.loc[df["split"] == 0])))
+        print("dev: {}".format(len(df.loc[df["split"] == 1])))
+        print("test: {}".format(len(df.loc[df["split"] == 2])))
+
+
+if __name__ == '__main__':
+    unittest.main()