tests: added tests (#250)

tests/embedchain/test_query.py

@@ -0,0 +1,43 @@
+import os
+import unittest
+from unittest.mock import MagicMock, patch
+
+from embedchain import App
+from embedchain.embedchain import QueryConfig
+
+
+class TestApp(unittest.TestCase):
+    os.environ["OPENAI_API_KEY"] = "test_key"
+
+    def setUp(self):
+        self.app = App()
+
+    @patch("chromadb.api.models.Collection.Collection.add", MagicMock)
+    def test_query(self):
+        """
+        This test checks the functionality of the 'query' method in the App class.
+        It simulates a scenario where the 'retrieve_from_database' method returns a context list and
+        'get_llm_model_answer' returns an expected answer string.
+
+        The 'query' method is expected to call 'retrieve_from_database' and 'get_llm_model_answer' methods
+        appropriately and return the right answer.
+
+        Key assumptions tested:
+        - 'retrieve_from_database' method is called exactly once with arguments: "Test query" and an instance of
+            QueryConfig.
+        - 'get_llm_model_answer' is called exactly once. The specific arguments are not checked in this test.
+        - 'query' method returns the value it received from 'get_llm_model_answer'.
+
+        The test isolates the 'query' method behavior by mocking out 'retrieve_from_database' and
+        'get_llm_model_answer' methods.
+        """
+        with patch.object(self.app, "retrieve_from_database") as mock_retrieve:
+            mock_retrieve.return_value = ["Test context"]
+            with patch.object(self.app, "get_llm_model_answer") as mock_answer:
+                mock_answer.return_value = "Test answer"
+                answer = self.app.query("Test query")
+
+        self.assertEqual(answer, "Test answer")
+        self.assertEqual(mock_retrieve.call_args[0][0], "Test query")
+        self.assertIsInstance(mock_retrieve.call_args[0][1], QueryConfig)
+        mock_answer.assert_called_once()