test: ban wall-clock readings in tests#22562

@@ -0,0 +1,98 @@
+import { defineRule, type ESTree } from "@oxlint/plugins";
+import * as Option from "effect/Option";
+
+import { getPropertyName, isIdentifier, unwrapExpression } from "../utils.ts";
+
+const TEST_FILE_PATTERN = /\.(?:test|spec)\.[cm]?[jt]sx?$/u;
+const WALL_CLOCK_CALLS = new Set([
+  "Date.now",
+  "performance.now",
+  "process.hrtime",
+  "process.hrtime.bigint",
+]);
+const VI_MOCKING_FUNCTIONS = new Set(["fn", "mock", "setSystemTime", "spyOn"]);
+const MOCK_METHODS = new Set([
+  "mockImplementation",
+  "mockImplementationOnce",
+  "mockResolvedValue",
+  "mockResolvedValueOnce",
+  "mockReturnValue",
+  "mockReturnValueOnce",
+]);
+
+const MESSAGE =
+  "Wall-clock reading in a test; elapsed-time assertions pass or fail with runner load. Use TestClock/`Clock` under `it.effect`, `vi.setSystemTime`, or a fixed epoch. Benchmarks live behind an env gate.";
+
+const memberPath = (node: unknown): Option.Option<ReadonlyArray<string>> => {
+  const expression = unwrapExpression(node);
+  if (Option.isNone(expression)) return Option.none();
+  if (expression.value.type === "Identifier") return Option.some([expression.value.name]);
+  if (expression.value.type !== "MemberExpression") return Option.none();
+  const property = getPropertyName(expression.value.property);

@@ -228,6 +231,7 @@ async function mountImport(remote = false) {
 
 // The mocked modules read `state`, so every test starts by replacing all of it.
 function setup() {
+  vi.spyOn(Date, "now").mockReturnValue(NOW);

@@ -391,7 +391,8 @@ describe("thread action undo", () => {
       await useThreadListActions().unpinThread(thread);
       expect(readThreadUndoNotice()?.action).toBe("Unpinned");
       await readThreadUndoNotice()!.undo();
-      const restoresSnooze = snoozedUntil != null && Date.parse(snoozedUntil) > Date.now();
+      // 2099 is the unexpired case; 2000 has long passed.
+      const restoresSnooze = snoozedUntil === "2099-01-01T09:00:00.000Z";