kingchenc
2ae76bb90e
Adds `BinanceRest::fetch_klines` to `wickra-data`: a blocking historical kline downloader (`GET /api/v3/klines`) and the historical counterpart to the F4 live `BinanceFeed`. It is the last native data-layer primitive needed to drop third-party HTTP/JSON download helpers (`jackson`, `jsonlite`, `urllib`, …) from the examples. ## What - **Core** (`wickra-data`): `fetch_klines(symbol, interval, limit, start?, end?)` built on `ureq` with native-tls — sharing the exact same TLS backend (native-tls 0.2 / SChannel) as the existing tokio-tungstenite live feed, so the two pull one TLS stack, not two. Parses Binance's 12-element array rows via the existing serde infrastructure into validated `Candle`s. Blocking by design (a one-shot request needs no async runtime; the FFI boundary is synchronous anyway). Nine mock-HTTP-server tests cover parse / empty / limit / transport / JSON / invariant-violation paths. - **C ABI**: `wickra_binance_fetch_klines(...)` (blocking drain into a caller buffer, `-1` on error) + regenerated cbindgen header and its vendored Go copy. - **Bindings**: native Node `fetchBinanceKlines` / Python `fetch_binance_klines`; generated Go `FetchBinanceKlines` / C# `BinanceFeed.FetchKlines` / Java `BinanceFeed.fetchKlines` / R `fetch_binance_klines`. C / C++ call the C ABI directly. **WASM is excluded** (browsers use the host `fetch`). The four C-ABI bindings are regenerated from the ScriptHelpers generators (not hand-edited); the regen diff is exactly the new wrapper in each. ## Verification All ten toolchains green locally: Rust (`cargo test`/`clippy`/`fmt`), Node, Python, Go, C#, Java, R (`R CMD INSTALL` + smoke), WASM (`cargo check`, confirmed `ureq` is not pulled). Each binding has an error-path smoke test; the parse/HTTP success path is covered by the Rust mock-server tests. No release in this PR — ships with the data-layer + numpy bundle later.
19 lines
794 B
R
19 lines
794 B
R
# The live Binance feed's connect -> read -> reconnect pipeline is covered
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# deterministically by the Rust mock-WS-server tests in wickra-data. Here we only
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# assert the binding's error paths, which need no network.
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test_that("binance feed rejects bad parameters", {
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expect_error(BinanceFeed("", 1L), "BinanceFeed")
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expect_error(BinanceFeed("BTCUSDT", 1L, "ws://127.0.0.1:1"), "BinanceFeed")
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})
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# The REST fetcher's parse/HTTP success path is covered by the Rust
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# mock-HTTP-server tests; here we only assert the binding's error paths.
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test_that("fetch_binance_klines rejects bad parameters", {
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expect_error(fetch_binance_klines("BTCUSDT", 6L, 0L), "limit")
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expect_error(
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fetch_binance_klines("BTCUSDT", 6L, 1L, base_url = "http://127.0.0.1:1"),
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"fetch_binance_klines"
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)
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})
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