feat: add avatar chat and knowledge workflow

digital-avatar-app/backend/tests/test_embeddings.py

@@ -0,0 +1,32 @@
+import os
+import tempfile
+import unittest
+
+import embeddings
+
+
+class TextExtractionTests(unittest.TestCase):
+    def write_text(self, suffix, content):
+        handle = tempfile.NamedTemporaryFile(suffix=suffix, delete=False)
+        handle.close()
+        self.addCleanup(lambda: os.path.exists(handle.name) and os.unlink(handle.name))
+        with open(handle.name, "w", encoding="utf-8") as stream:
+            stream.write(content)
+        return handle.name
+
+    def test_extracts_utf8_markdown(self):
+        path = self.write_text(".md", "# 退款规则\n\n七日内可申请退款。")
+        self.assertEqual(embeddings.extract_text(path, ".md"), "# 退款规则\n\n七日内可申请退款。")
+
+    def test_extracts_utf8_text(self):
+        path = self.write_text(".txt", "客服热线：400-123-4567")
+        self.assertEqual(embeddings.extract_text(path, ".txt"), "客服热线：400-123-4567")
+
+    def test_rejects_unsupported_extension(self):
+        path = self.write_text(".csv", "not supported")
+        with self.assertRaises(ValueError):
+            embeddings.extract_text(path, ".csv")
+
+
+if __name__ == "__main__":
+    unittest.main()