chore(cli): split 40_testing (#22112)

No code changes -- just splitting 40_testing into three files and
removing a couple of unused lines of code.

1 files changed, 60 insertions, 0 deletions

diff --git a/cli/js/40_test_common.js b/cli/js/40_test_common.js
new file mode 100644
index 000000000..7711148f1
--- /dev/null
+++ b/cli/js/40_test_common.js
@@ -0,0 +1,60 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import { core, primordials } from "ext:core/mod.js";
+import { serializePermissions } from "ext:runtime/10_permissions.js";
+const ops = core.ops;
+const {
+  StringPrototypeReplaceAll,
+  SafeArrayIterator,
+} = primordials;
+
+const ESCAPE_ASCII_CHARS = [
+  ["\b", "\\b"],
+  ["\f", "\\f"],
+  ["\t", "\\t"],
+  ["\n", "\\n"],
+  ["\r", "\\r"],
+  ["\v", "\\v"],
+];
+
+/**
+ * @param {string} name
+ * @returns {string}
+ */
+export function escapeName(name) {
+  // Check if we need to escape a character
+  for (let i = 0; i < name.length; i++) {
+    const ch = name.charCodeAt(i);
+    if (ch <= 13 && ch >= 8) {
+      // Slow path: We do need to escape it
+      for (const [escape, replaceWith] of ESCAPE_ASCII_CHARS) {
+        name = StringPrototypeReplaceAll(name, escape, replaceWith);
+      }
+      return name;
+    }
+  }
+
+  // We didn't need to escape anything, return original string
+  return name;
+}
+
+export function pledgePermissions(permissions) {
+  return ops.op_pledge_test_permissions(
+    serializePermissions(permissions),
+  );
+}
+
+export function restorePermissions(token) {
+  ops.op_restore_test_permissions(token);
+}
+
+export function withPermissions(fn, permissions) {
+  return async function applyPermissions(...params) {
+    const token = pledgePermissions(permissions);
+
+    try {
+      return await fn(...new SafeArrayIterator(params));
+    } finally {
+      restorePermissions(token);
+    }
+  };
+}