26 lines
1.2 KiB
JavaScript
26 lines
1.2 KiB
JavaScript
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const test = require("node:test");
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const assert = require("node:assert/strict");
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const {
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FAST_DOWNLOAD_CHANNELS_PER_SESSION,
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DOWNLOAD_TRANSFER_CONCURRENCY,
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UPLOAD_TRANSFER_CONCURRENCY,
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TRANSFER_CHUNK_SIZE,
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} = require("./transferLimits.cjs");
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test("SFTP transfer limits preserve upload safety and the pre-regression download window", () => {
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assert.equal(UPLOAD_TRANSFER_CONCURRENCY, 64);
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assert.equal(DOWNLOAD_TRANSFER_CONCURRENCY, 64);
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assert.equal(FAST_DOWNLOAD_CHANNELS_PER_SESSION, 1);
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// Keep ssh2's default chunk size — larger packets can corrupt uploads on
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// servers that do not honour non-default WRITE sizes (#2022).
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assert.equal(TRANSFER_CHUNK_SIZE, 32 * 1024);
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// #2449 / Electerm-class: upload window is 2MB (64 × 32KB). Raising only
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// concurrency keeps the safe packet size while matching ssh2/Electerm defaults.
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assert.equal(UPLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE, 2 * 1024 * 1024);
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// #2030 reduced the shared chunk size from 512KB to 32KB. Downloads need
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// enough parallel reads to preserve the 2MB in-flight window that existed
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// after #1533, otherwise high-latency proxy paths collapse to KB/s speeds.
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assert.equal(DOWNLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE, 2 * 1024 * 1024);
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});
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