run testes on assessments predictions pipeline

tests/test_pipeline/test_data_preprocessor.py

@@ -0,0 +1,18 @@
+import unittest
+from src.pipeline.data_preprocessor import DataPreprocessor
+import os
+class TestDataPreprocessor(unittest.TestCase):
+
+    def setUp(self):
+        self.dp = DataPreprocessor(
+            input_path="/root/ds_erp_ai/data/raw/dummy_assessment_data.csv",
+            company_id="company_id"
+        )
+
+    def test_run(self):
+        res = self.dp.run()
+        self.assertIsNotNone(res)  # Check that the result is not None
+        self.assertTrue(os.path.exists(res))  # Check that the output file exists
+
+if __name__ == '__main__':
+    unittest.main()