64 lines
2.4 KiB
Python
64 lines
2.4 KiB
Python
"""Unit: SSE frame serialization for POST /api/chat (PLAN §4 contract)."""
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from __future__ import annotations
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import json
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from app.api.chat import sse_event
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from app.schemas import ChatErrorEvent
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def _payload(frame: str) -> dict:
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assert frame.startswith("data: ")
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assert frame.endswith("\n\n")
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return json.loads(frame.removeprefix("data: ").strip())
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def test_delta_frame_serializes_exactly() -> None:
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frame = sse_event({"type": "delta", "text": "hi"})
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assert frame == 'data: {"type": "delta", "text": "hi"}\n\n'
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assert _payload(frame) == {"type": "delta", "text": "hi"}
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def test_done_frame_carries_full_contract_shape() -> None:
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payload = {
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"type": "done",
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"deflected": False,
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"sources": [{"source": "Homelab", "path": "kubernetes.md", "title": "K8s"}],
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"suggestions": [],
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}
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assert _payload(sse_event(payload)) == payload
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def test_error_frame_serializes() -> None:
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frame = sse_event({"type": "error", "detail": "boom"})
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assert _payload(frame) == {"type": "error", "detail": "boom"}
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def test_unicode_survives_roundtrip() -> None:
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frame = sse_event({"type": "delta", "text": "🧠 café — \"quoted\""})
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# ensure_ascii=False keeps the frame readable (no \uXXXX escapes).
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assert "🧠 café" in frame
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assert _payload(frame)["text"] == "🧠 café — \"quoted\""
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def test_multi_line_text_stays_one_frame() -> None:
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"""Newlines inside the JSON payload must be escaped so the frame
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delimiter ``\\n\\n`` remains unambiguous."""
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frame = sse_event({"type": "delta", "text": "line1\nline2\n\n"})
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assert frame.count("\n\n") == 1 # only the frame terminator
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assert _payload(frame)["text"] == "line1\nline2\n\n"
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def test_error_event_model_serializes_exact_frame() -> None:
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"""The ``ChatErrorEvent`` model is the wire shape of every server-side
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failure the UI's state machine (phase 06) must recover from."""
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frame = sse_event(ChatErrorEvent(detail="boom").model_dump())
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assert frame == 'data: {"type": "error", "detail": "boom"}\n\n'
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assert _payload(frame) == {"type": "error", "detail": "boom"}
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def test_error_event_shape_is_type_and_detail_only() -> None:
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dumped = ChatErrorEvent(detail="The chat model dropped the connection").model_dump()
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assert set(dumped.keys()) == {"type", "detail"}
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assert dumped["type"] == "error" # default — call sites never spell it out
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