test(sse): cover send_body fallback when ping_interval is None

Author: TanayK07

tests/unit/test_response/test_sse.py

@@ -288,3 +288,34 @@ async def mock_receive() -> HTTPDisconnectEvent:
     body = b"".join(received).decode()
     assert "hello" in body
     assert "world" in body
+
+
+async def test_sse_response_send_body_without_ping() -> None:
+    """ASGIStreamingSSEResponse.send_body delegates to parent when ping_interval is None."""
+
+    async def gen() -> AsyncIterator[bytes]:
+        yield b"data: hello\r\n\r\n"
+
+    response = ASGIStreamingSSEResponse(
+        iterator=gen(),
+        ping_interval=None,
+        media_type="text/event-stream",
+        status_code=200,
+    )
+
+    received: list[bytes] = []
+
+    async def mock_send(message: Message) -> None:
+        if message.get("type") == "http.response.body":
+            body = message.get("body", b"")
+            received.append(body if isinstance(body, bytes) else b"")
+
+    async def mock_receive() -> HTTPDisconnectEvent:
+        await anyio.sleep(10)
+        return {"type": "http.disconnect"}
+
+    await response.send_body(mock_send, mock_receive)
+
+    body = b"".join(received).decode()
+    assert "hello" in body
+    assert ": ping" not in body