[Init] Initial commit - NetMesh terminal manager

components/terminal/useServerStats.test.ts

@@ -0,0 +1,51 @@
+import assert from "node:assert/strict";
+import { readFileSync } from "node:fs";
+import test from "node:test";
+
+test("server stats retry can restart polling after give-up", () => {
+  const source = readFileSync(new URL("../../application/state/useServerStats.ts", import.meta.url), "utf8");
+  const reconcileStart = source.indexOf("function reconcileSharedServerStatsSession");
+  const shouldRestartCheck = source.indexOf("const shouldRestartPolling", reconcileStart);
+  const givenUpCheck = source.indexOf("if (session.givenUp) return;", shouldRestartCheck);
+  const markPollingActive = source.indexOf("session.pollingActive = true", shouldRestartCheck);
+
+  assert.notEqual(reconcileStart, -1);
+  assert.notEqual(shouldRestartCheck, -1);
+  assert.notEqual(givenUpCheck, -1);
+  assert.notEqual(markPollingActive, -1);
+  assert.ok(givenUpCheck < markPollingActive);
+});
+
+test("server stats stale requests do not block a fresh visible fetch", () => {
+  const source = readFileSync(new URL("../../application/state/useServerStats.ts", import.meta.url), "utf8");
+
+  assert.match(source, /inflightGeneration: number \| null/);
+  assert.match(source, /session\.inflight && session\.inflightGeneration === session\.fetchGeneration/);
+  assert.match(source, /session\.inflightGeneration = generation/);
+});
+
+test("server stats polling does not stop when its terminal is in the background", () => {
+  const source = readFileSync(new URL("../../application/state/useServerStats.ts", import.meta.url), "utf8");
+
+  assert.doesNotMatch(source, /isVisible/);
+  assert.doesNotMatch(source, /getVisibleServerStatsClients/);
+  assert.doesNotMatch(source, /resuming from hidden/);
+});
+
+test("server stats keep last snapshot when all consumers pause", () => {
+  const source = readFileSync(new URL("../../application/state/useServerStats.ts", import.meta.url), "utf8");
+  const reconcileStart = source.indexOf("function reconcileSharedServerStatsSession");
+  const idleBranch = source.indexOf("if (activeClients.length === 0)", reconcileStart);
+  const nextFunction = source.indexOf("\nfunction ", reconcileStart + 1);
+  const idleBody = source.slice(idleBranch, nextFunction === -1 ? undefined : nextFunction);
+
+  assert.notEqual(reconcileStart, -1);
+  assert.notEqual(idleBranch, -1);
+  // Pausing must not wipe lastUpdated stats (Overview tab-switch empty flash).
+  assert.match(idleBody, /clearServerStatsTimers\(session\)/);
+  assert.doesNotMatch(idleBody, /resetServerStatsSession\(session\)/);
+  assert.doesNotMatch(idleBody, /createInitialState/);
+  // But give-up must clear so resume can auto-retry after hard failure.
+  assert.match(idleBody, /session\.givenUp = false/);
+  assert.match(idleBody, /session\.consecutiveFailures = 0/);
+});