From 10330bd7aa72b3a071329e034d9e350806ed65f9 Mon Sep 17 00:00:00 2001
From: Kannan Priyadharshan <kpd2204@gmail.com>
Date: Tue, 23 Jun 2026 21:13:46 +0800
Subject: [PATCH] test(anthropic): cover cache usage edge cases

---
 ...al_pass_through_adapters_transformation.py | 39 +++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py b/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
index 1d17cb93699..3949af50410 100644
--- a/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
+++ b/tests/test_litellm/llms/anthropic/experimental_pass_through/adapters/test_anthropic_experimental_pass_through_adapters_transformation.py
@@ -2384,6 +2384,45 @@ def test_translate_streaming_openai_response_to_anthropic_cache_tokens_from_hidd
     assert message_delta["usage"]["cache_creation_input_tokens"] == 20
 
 
+def test_translate_streaming_openai_response_to_anthropic_cache_tokens_with_applied_edits():
+    from litellm.types.utils import PromptTokensDetailsWrapper
+
+    usage = Usage(
+        prompt_tokens=120,
+        completion_tokens=50,
+        total_tokens=170,
+        prompt_tokens_details=PromptTokensDetailsWrapper(
+            cached_tokens=30,
+            cache_creation_tokens=20,
+        ),
+    )
+    response = ModelResponseStream(
+        choices=[
+            StreamingChoices(
+                index=0,
+                delta=Delta(),
+                finish_reason="stop",
+            )
+        ],
+        usage=usage,
+    )
+
+    adapter = LiteLLMAnthropicMessagesAdapter()
+    message_delta = adapter.translate_streaming_openai_response_to_anthropic(
+        response=response,
+        current_content_block_index=0,
+        applied_edits=[{"type": "compact_20260112"}],
+    )
+
+    assert message_delta["usage"]["input_tokens"] == 70
+    assert message_delta["usage"]["output_tokens"] == 50
+    assert message_delta["usage"]["cache_read_input_tokens"] == 30
+    assert message_delta["usage"]["cache_creation_input_tokens"] == 20
+    assert message_delta["context_management"]["applied_edits"][0]["type"] == (
+        "compact_20260112"
+    )
+
+
 # =====================================================================
 # Web Search Tool Transformation Tests
 # =====================================================================