Added deprecation warnings for mlm_* arguments.

tests/test_markitdown.py

@@ -6,6 +6,8 @@ import shutil
 import pytest
 import requests
 
+from warnings import catch_warnings, resetwarnings
+
 from markitdown import MarkItDown
 
 skip_remote = (
@@ -229,8 +231,43 @@ def test_markitdown_exiftool() -> None:
         assert target in result.text_content
 
 
+def test_markitdown_deprecation() -> None:
+    try:
+        with catch_warnings(record=True) as w:
+            test_client = object()
+            markitdown = MarkItDown(mlm_client=test_client)
+            assert len(w) == 1
+            assert w[0].category is DeprecationWarning
+            assert markitdown._llm_client == test_client
+    finally:
+        resetwarnings()
+
+    try:
+        with catch_warnings(record=True) as w:
+            markitdown = MarkItDown(mlm_model="gpt-4o")
+            assert len(w) == 1
+            assert w[0].category is DeprecationWarning
+            assert markitdown._llm_model == "gpt-4o"
+    finally:
+        resetwarnings()
+
+    try:
+        test_client = object()
+        markitdown = MarkItDown(mlm_client=test_client, llm_client=test_client)
+        assert False
+    except ValueError:
+        pass
+
+    try:
+        markitdown = MarkItDown(mlm_model="gpt-4o", llm_model="gpt-4o")
+        assert False
+    except ValueError:
+        pass
+
+
 if __name__ == "__main__":
     """Runs this file's tests from the command line."""
     test_markitdown_remote()
     test_markitdown_local()
     test_markitdown_exiftool()
+    test_markitdown_deprecation()