test: Define expected partial update behavior for DeckClient.update_card

Refactor tests to assert what SHOULD happen (partial updates preserve
unchanged fields) rather than documenting current buggy behavior.

Tests will fail until fix is implemented in client or upstream.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/client/deck/test_deck_update_card_api.py

@@ -1,22 +1,16 @@
 """
 Integration tests for DeckClient.update_card API behavior.
 
-This test suite documents the behavior of our DeckClient.update_card method
-and identifies bugs in how it handles partial updates.
-
-FINDINGS:
-The Deck API PUT endpoint is a FULL REPLACEMENT, not a partial update.
-Fields not included in the request body are either:
-- Required and cause 400 error (title, type, owner)
-- Optional but get CLEARED if not sent (description)
+These tests define the EXPECTED behavior for partial card updates:
+- Only fields explicitly passed should be modified
+- All other fields should be preserved unchanged
 
 Related issues:
-- nextcloud-mcp-server #452: DeckClient.update_card always sets owner/type
+- nextcloud-mcp-server #452: DeckClient.update_card partial update bugs
 - deck #3127: REST API Docs: missing parameter in "update cards"
 - deck #4106: Provide a working example of API usage to update a cards details
 """
 
-import httpx
 import pytest
 
 pytestmark = [pytest.mark.integration]
@@ -48,22 +42,15 @@ async def deck_test_card(nc_client):
 
 class TestDeckClientUpdateCard:
     """
-    Test DeckClient.update_card() method behavior with various parameter combinations.
+    Test DeckClient.update_card() partial update behavior.
 
-    These tests document the current buggy behavior where:
-    1. Updating without title fails (400) - title is required but conditionally sent
-    2. Updating with title clears description - description should be preserved
+    Expected: Only explicitly provided fields are updated, all others preserved.
     """
 
-    async def test_update_title_only_clears_description(
+    async def test_update_title_only_preserves_description(
         self, nc_client, deck_test_card
     ):
-        """
-        BUG: Updating only the title clears the description.
-
-        The Deck PUT API is a full replacement. Our client doesn't send
-        description when not explicitly provided, so it gets cleared.
-        """
+        """Updating only the title should preserve the description."""
         await nc_client.deck.update_card(
             board_id=deck_test_card["board_id"],
             stack_id=deck_test_card["stack_id"],
@@ -77,28 +64,27 @@ class TestDeckClientUpdateCard:
             deck_test_card["card_id"],
         )
         assert updated.title == "New Title"
-        # BUG: Description was cleared instead of preserved
-        assert updated.description == ""  # Should be "Original description"
+        assert updated.description == "Original description"
 
-    async def test_update_description_only_fails(self, nc_client, deck_test_card):
-        """
-        BUG: Updating only the description fails with 400.
+    async def test_update_description_only(self, nc_client, deck_test_card):
+        """Updating only the description should work and preserve other fields."""
+        await nc_client.deck.update_card(
+            board_id=deck_test_card["board_id"],
+            stack_id=deck_test_card["stack_id"],
+            card_id=deck_test_card["card_id"],
+            description="New description only",
+        )
 
-        The Deck PUT API requires title, type, and owner.
-        Our client doesn't send title when not explicitly provided.
-        """
-        with pytest.raises(httpx.HTTPStatusError) as exc_info:
-            await nc_client.deck.update_card(
-                board_id=deck_test_card["board_id"],
-                stack_id=deck_test_card["stack_id"],
-                card_id=deck_test_card["card_id"],
-                description="New description only",
-            )
-
-        assert exc_info.value.response.status_code == 400
+        updated = await nc_client.deck.get_card(
+            deck_test_card["board_id"],
+            deck_test_card["stack_id"],
+            deck_test_card["card_id"],
+        )
+        assert updated.title == "Original Title"
+        assert updated.description == "New description only"
 
     async def test_update_title_and_description(self, nc_client, deck_test_card):
-        """Updating title and description together works correctly."""
+        """Updating title and description together should work."""
         await nc_client.deck.update_card(
             board_id=deck_test_card["board_id"],
             stack_id=deck_test_card["stack_id"],
@@ -115,40 +101,62 @@ class TestDeckClientUpdateCard:
         assert updated.title == "New Title"
         assert updated.description == "New description"
 
-    async def test_update_duedate_only_fails(self, nc_client, deck_test_card):
-        """
-        BUG: Updating only the duedate fails with 400.
+    async def test_update_duedate_only(self, nc_client, deck_test_card):
+        """Updating only the duedate should work and preserve other fields."""
+        await nc_client.deck.update_card(
+            board_id=deck_test_card["board_id"],
+            stack_id=deck_test_card["stack_id"],
+            card_id=deck_test_card["card_id"],
+            duedate="2025-12-31T23:59:59+00:00",
+        )
 
-        title is required but not sent when not explicitly provided.
-        """
-        with pytest.raises(httpx.HTTPStatusError) as exc_info:
-            await nc_client.deck.update_card(
-                board_id=deck_test_card["board_id"],
-                stack_id=deck_test_card["stack_id"],
-                card_id=deck_test_card["card_id"],
-                duedate="2025-12-31T23:59:59+00:00",
-            )
+        updated = await nc_client.deck.get_card(
+            deck_test_card["board_id"],
+            deck_test_card["stack_id"],
+            deck_test_card["card_id"],
+        )
+        assert updated.title == "Original Title"
+        assert updated.description == "Original description"
+        assert updated.duedate is not None
 
-        assert exc_info.value.response.status_code == 400
+    async def test_update_archived_only(self, nc_client, deck_test_card):
+        """Updating only the archived status should work and preserve other fields."""
+        await nc_client.deck.update_card(
+            board_id=deck_test_card["board_id"],
+            stack_id=deck_test_card["stack_id"],
+            card_id=deck_test_card["card_id"],
+            archived=True,
+        )
 
-    async def test_update_archived_only_fails(self, nc_client, deck_test_card):
-        """
-        BUG: Updating only the archived status fails with 400.
+        updated = await nc_client.deck.get_card(
+            deck_test_card["board_id"],
+            deck_test_card["stack_id"],
+            deck_test_card["card_id"],
+        )
+        assert updated.title == "Original Title"
+        assert updated.description == "Original description"
+        assert updated.archived is True
 
-        title is required but not sent when not explicitly provided.
-        """
-        with pytest.raises(httpx.HTTPStatusError) as exc_info:
-            await nc_client.deck.update_card(
-                board_id=deck_test_card["board_id"],
-                stack_id=deck_test_card["stack_id"],
-                card_id=deck_test_card["card_id"],
-                archived=True,
-            )
+    async def test_update_order_only(self, nc_client, deck_test_card):
+        """Updating only the order should work and preserve other fields."""
+        await nc_client.deck.update_card(
+            board_id=deck_test_card["board_id"],
+            stack_id=deck_test_card["stack_id"],
+            card_id=deck_test_card["card_id"],
+            order=99,
+        )
 
-        assert exc_info.value.response.status_code == 400
+        updated = await nc_client.deck.get_card(
+            deck_test_card["board_id"],
+            deck_test_card["stack_id"],
+            deck_test_card["card_id"],
+        )
+        assert updated.title == "Original Title"
+        assert updated.description == "Original description"
+        assert updated.order == 99
 
     async def test_update_preserves_type(self, nc_client, deck_test_card):
-        """Type is correctly preserved (already always sent in current implementation)."""
+        """Type should be preserved when not explicitly changed."""
         original = deck_test_card["card"]
 
         await nc_client.deck.update_card(
@@ -164,9 +172,10 @@ class TestDeckClientUpdateCard:
             deck_test_card["card_id"],
         )
         assert updated.type == original.type
+        assert updated.description == "Original description"
 
     async def test_update_preserves_owner(self, nc_client, deck_test_card):
-        """Owner is correctly preserved (already always sent in current implementation)."""
+        """Owner should be preserved when not explicitly changed."""
         original = deck_test_card["card"]
 
         await nc_client.deck.update_card(
@@ -182,19 +191,4 @@ class TestDeckClientUpdateCard:
             deck_test_card["card_id"],
         )
         assert updated.owner == original.owner
-
-    async def test_update_order_only_fails(self, nc_client, deck_test_card):
-        """
-        BUG: Updating only the order fails with 400.
-
-        title is required but not sent when not explicitly provided.
-        """
-        with pytest.raises(httpx.HTTPStatusError) as exc_info:
-            await nc_client.deck.update_card(
-                board_id=deck_test_card["board_id"],
-                stack_id=deck_test_card["stack_id"],
-                card_id=deck_test_card["card_id"],
-                order=1,
-            )
-
-        assert exc_info.value.response.status_code == 400
+        assert updated.description == "Original description"