From 7bfa302b75c2450a872dc6b5de0002a9c7959ea9 Mon Sep 17 00:00:00 2001
From: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>
Date: Wed, 14 Sep 2022 04:12:32 -0700
Subject: Make `crypto.getRandomValues()` faster + fix > 1 byte/element typed
 arrays

Fix crypto.getRandomValues() with > 1 byte element typed arrays

Fixes https://github.com/oven-sh/bun/issues/1237
---
 test/bun.js/web-globals.test.js | 38 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

(limited to 'test/bun.js/web-globals.test.js')

diff --git a/test/bun.js/web-globals.test.js b/test/bun.js/web-globals.test.js
index ac7c22e84..178f5dd00 100644
--- a/test/bun.js/web-globals.test.js
+++ b/test/bun.js/web-globals.test.js
@@ -1,4 +1,4 @@
-import { expect, test } from "bun:test";
+import { expect, it, test } from "bun:test";
 
 test("exists", () => {
   expect(typeof URL !== "undefined").toBe(true);
@@ -44,3 +44,39 @@ test("MessageEvent", () => {
   target.dispatchEvent(event);
   expect(called).toBe(true);
 });
+
+it("crypto.getRandomValues", () => {
+  var foo = new Uint8Array(32);
+
+  // run it once
+  var array = crypto.getRandomValues(foo);
+  expect(array).toBe(foo);
+  expect(array.reduce((sum, a) => (sum += a === 0), 0) != foo.length).toBe(
+    true
+  );
+
+  // run it again to check that the fast path works
+  for (var i = 0; i < 9000; i++) {
+    var array = crypto.getRandomValues(foo);
+    expect(array).toBe(foo);
+  }
+});
+
+it("crypto.randomUUID", () => {
+  var uuid = crypto.randomUUID();
+  expect(uuid.length).toBe(36);
+  expect(uuid[8]).toBe("-");
+  expect(uuid[13]).toBe("-");
+  expect(uuid[18]).toBe("-");
+  expect(uuid[23]).toBe("-");
+
+  // check that the fast path works
+  for (let i = 0; i < 9000; i++) {
+    var uuid2 = crypto.randomUUID();
+    expect(uuid2.length).toBe(36);
+    expect(uuid2[8]).toBe("-");
+    expect(uuid2[13]).toBe("-");
+    expect(uuid2[18]).toBe("-");
+    expect(uuid2[23]).toBe("-");
+  }
+});
-- 
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