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import base64
import json
from headroom.proxy.handlers.anthropic import AnthropicHandlerMixin
from headroom.proxy.handlers.openai import OpenAIHandlerMixin, _decode_openai_bearer_payload
def _jwt(payload: object) -> str:
header = {"alg": "none", "typ": "JWT"}
def encode(part: object) -> str:
raw = json.dumps(part, separators=(",", ":")).encode("utf-8")
return base64.urlsafe_b64encode(raw).decode("ascii").rstrip("=")
return f"{encode(header)}.{encode(payload)}."
class _ImageCompressor:
def __init__(self, compressed_message):
self._compressed_message = compressed_message
def compress(self, messages, provider): # noqa: ANN001, ANN201
assert provider == "anthropic"
return [self._compressed_message]
def test_decode_openai_bearer_payload_handles_missing_and_non_mapping_payloads() -> None:
assert _decode_openai_bearer_payload({}) is None
assert _decode_openai_bearer_payload({"authorization": "Basic abc"}) is None
assert (
_decode_openai_bearer_payload({"authorization": f"Bearer {_jwt(['not', 'a', 'dict'])}"})
is None
)
def test_openai_handler_prefix_helpers_cover_edge_cases() -> None:
assert OpenAIHandlerMixin._strict_previous_turn_frozen_count([], 2) == 2
assert (
OpenAIHandlerMixin._strict_previous_turn_frozen_count(
[{"role": "assistant"}, {"role": "user"}],
0,
)
== 1
)
assert (
OpenAIHandlerMixin._strict_previous_turn_frozen_count(
[{"role": "user"}, {"role": "assistant"}],
0,
)
== 2
)
original = [{"role": "system", "content": "keep"}, {"role": "user", "content": "hello"}]
restored, changed = OpenAIHandlerMixin._restore_frozen_prefix(
original,
[],
frozen_message_count=1,
)
assert restored == [{"role": "system", "content": "keep"}]
assert changed == 1
restored, changed = OpenAIHandlerMixin._restore_frozen_prefix(
original,
[{"role": "system", "content": "changed"}, {"role": "user", "content": "hello"}],
frozen_message_count=1,
)
assert restored == original
assert changed == 1
def test_anthropic_tool_sort_and_context_append_helpers() -> None:
tools = [
{"type": "function", "function": {"name": "beta"}},
{"name": "alpha"},
{"type": "tool"},
]
sorted_tools = AnthropicHandlerMixin._sort_tools_deterministically(tools)
assert [AnthropicHandlerMixin._tool_sort_key(tool)[0] for tool in sorted_tools] == [
"alpha",
"beta",
"tool",
]
assert AnthropicHandlerMixin._sort_tools_deterministically(None) is None
assert (
AnthropicHandlerMixin._append_context_to_latest_non_frozen_user_turn(
[], "ctx", frozen_message_count=0
)
== []
)
assert AnthropicHandlerMixin._append_context_to_latest_non_frozen_user_turn(
[{"role": "user", "content": "hello"}],
"ctx",
frozen_message_count=0,
) == [{"role": "user", "content": "hello\n\nctx"}]
assert AnthropicHandlerMixin._append_context_to_latest_non_frozen_user_turn(
[{"role": "user", "content": [{"type": "text", "text": "hello"}]}],
"ctx",
frozen_message_count=0,
) == [{"role": "user", "content": [{"type": "text", "text": "hello"}]}]
def test_anthropic_image_compression_helper_only_rewrites_latest_eligible_turn() -> None:
image_message = {
"role": "user",
"content": [{"type": "image", "source": {"type": "base64", "data": "abc"}}],
}
compressed = {
"role": "user",
"content": [{"type": "image", "source": {"type": "base64", "data": "xyz"}}],
}
assert (
AnthropicHandlerMixin._compress_latest_user_turn_images_cache_safe(
[],
frozen_message_count=0,
compressor=_ImageCompressor(compressed),
)
== []
)
assert AnthropicHandlerMixin._compress_latest_user_turn_images_cache_safe(
[image_message],
frozen_message_count=1,
compressor=_ImageCompressor(compressed),
) == [image_message]
assert AnthropicHandlerMixin._compress_latest_user_turn_images_cache_safe(
[{"role": "assistant", "content": image_message["content"]}],
frozen_message_count=0,
compressor=_ImageCompressor(compressed),
) == [{"role": "assistant", "content": image_message["content"]}]
assert AnthropicHandlerMixin._compress_latest_user_turn_images_cache_safe(
[{"role": "user", "content": "no-image"}],
frozen_message_count=0,
compressor=_ImageCompressor(compressed),
) == [{"role": "user", "content": "no-image"}]
assert AnthropicHandlerMixin._compress_latest_user_turn_images_cache_safe(
[image_message],
frozen_message_count=0,
compressor=_ImageCompressor(image_message),
) == [image_message]
assert AnthropicHandlerMixin._compress_latest_user_turn_images_cache_safe(
[image_message],
frozen_message_count=0,
compressor=_ImageCompressor(compressed),
) == [compressed]
def test_anthropic_cache_delta_helpers_cover_string_list_and_role_mismatch() -> None:
previous_original = [{"role": "user", "content": "hello"}]
previous_forwarded = [{"role": "user", "content": "HELLO"}]
assert AnthropicHandlerMixin._extract_cache_stable_delta(
[{"role": "user", "content": "hello"}, {"role": "assistant", "content": "next"}],
previous_original,
previous_forwarded,
) == (previous_forwarded, [{"role": "assistant", "content": "next"}])
assert (
AnthropicHandlerMixin._extract_cache_stable_delta(
[{"role": "assistant", "content": "hello"}],
previous_original,
previous_forwarded,
)
is None
)
string_suffix = AnthropicHandlerMixin._extract_cache_stable_last_message_suffix(
[{"role": "user", "content": "hello world"}],
previous_original,
previous_forwarded,
)
assert string_suffix == ([], previous_forwarded[0], [{"role": "user", "content": " world"}])
list_suffix = AnthropicHandlerMixin._extract_cache_stable_last_message_suffix(
[
{
"role": "user",
"content": [{"type": "text", "text": "a"}, {"type": "text", "text": "b"}],
}
],
[{"role": "user", "content": [{"type": "text", "text": "a"}]}],
[{"role": "user", "content": [{"type": "text", "text": "A"}]}],
)
assert list_suffix == (
[],
{"role": "user", "content": [{"type": "text", "text": "A"}]},
[{"role": "user", "content": [{"type": "text", "text": "b"}]}],
)
assert AnthropicHandlerMixin._merge_appended_message_delta(
{"role": "user", "content": "HELLO"},
{"role": "user", "content": " world"},
) == {"role": "user", "content": "HELLO world"}
assert AnthropicHandlerMixin._merge_appended_message_delta(
{"role": "user", "content": [{"type": "text", "text": "A"}]},
{"role": "user", "content": [{"type": "text", "text": "b"}]},
) == {"role": "user", "content": [{"type": "text", "text": "A"}, {"type": "text", "text": "b"}]}
assert (
AnthropicHandlerMixin._merge_appended_message_delta(
{"role": "user", "content": "A"},
{"role": "assistant", "content": "B"},
)
is None
)
def test_anthropic_assistant_message_helper_requires_assistant_role() -> None:
assert AnthropicHandlerMixin._assistant_message_from_response_json(None) is None
assert AnthropicHandlerMixin._assistant_message_from_response_json({"role": "user"}) is None
assert AnthropicHandlerMixin._assistant_message_from_response_json(
{"role": "assistant", "content": [{"type": "text", "text": "ok"}]}
) == {"role": "assistant", "content": [{"type": "text", "text": "ok"}]}
|