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node_modules/zod/src/v4/classic/tests/jitless-allows-eval.test.ts

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+import { expect, test } from "vitest";
+import * as z from "zod/v4";
+import * as core from "zod/v4/core";
+
+const { allowsEval } = core.util;
+
+// Regression test for the CSP feature-probe issue (#4461, #5414):
+// `allowsEval` used to always invoke `new Function("")` even when the
+// user had opted into `z.config({ jitless: true })`, producing a
+// `securitypolicyviolation` report on strict-CSP pages (no 'unsafe-eval')
+// that Chrome DevTools surfaces as an Issue.
+//
+// The fix: when `globalConfig.jitless` is true, `allowsEval.value`
+// returns `false` without triggering the probe. This test lives in its
+// own file because vitest isolates ESM graphs per file, so the cached
+// `allowsEval.value` is fresh and is never accessed before the config
+// mutation below.
+
+test("globalConfig.jitless=true short-circuits the allowsEval probe", () => {
+  // Set BEFORE first access to allowsEval.value — the getter is memoised
+  // via `cached()`, so the contract is "configure at app entry".
+  z.config({ jitless: true });
+
+  // Sanity: config is wired
+  expect(core.globalConfig.jitless).toBe(true);
+
+  // Spy: if the probe were still attempted, `new Function("")` would be
+  // called. Swap the global `Function` constructor with a throwing stub
+  // and verify the stub is NEVER invoked.
+  const origFunction = globalThis.Function;
+  let probeAttempted = false;
+  // @ts-expect-error assigning a stub to the Function global for the test
+  globalThis.Function = function StubFunction(..._args: unknown[]): never {
+    probeAttempted = true;
+    throw new Error("allowsEval probe should have been skipped under jitless=true");
+  };
+
+  try {
+    expect(allowsEval.value).toBe(false);
+    expect(probeAttempted).toBe(false);
+  } finally {
+    globalThis.Function = origFunction;
+    // Restore config so other test files in the same worker see default
+    delete core.globalConfig.jitless;
+  }
+});