[Init] Initial commit - NetMesh terminal manager

electron/bridges/transferLimits.test.cjs

@@ -0,0 +1,25 @@
+const test = require("node:test");
+const assert = require("node:assert/strict");
+
+const {
+  FAST_DOWNLOAD_CHANNELS_PER_SESSION,
+  DOWNLOAD_TRANSFER_CONCURRENCY,
+  UPLOAD_TRANSFER_CONCURRENCY,
+  TRANSFER_CHUNK_SIZE,
+} = require("./transferLimits.cjs");
+
+test("SFTP transfer limits preserve upload safety and the pre-regression download window", () => {
+  assert.equal(UPLOAD_TRANSFER_CONCURRENCY, 64);
+  assert.equal(DOWNLOAD_TRANSFER_CONCURRENCY, 64);
+  assert.equal(FAST_DOWNLOAD_CHANNELS_PER_SESSION, 1);
+  // Keep ssh2's default chunk size — larger packets can corrupt uploads on
+  // servers that do not honour non-default WRITE sizes (#2022).
+  assert.equal(TRANSFER_CHUNK_SIZE, 32 * 1024);
+  // #2449 / Electerm-class: upload window is 2MB (64 × 32KB). Raising only
+  // concurrency keeps the safe packet size while matching ssh2/Electerm defaults.
+  assert.equal(UPLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE, 2 * 1024 * 1024);
+  // #2030 reduced the shared chunk size from 512KB to 32KB. Downloads need
+  // enough parallel reads to preserve the 2MB in-flight window that existed
+  // after #1533, otherwise high-latency proxy paths collapse to KB/s speeds.
+  assert.equal(DOWNLOAD_TRANSFER_CONCURRENCY * TRANSFER_CHUNK_SIZE, 2 * 1024 * 1024);
+});