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.

3 files changed, 547 insertions, 529 deletions

diff --git a/cli/js/40_bench.js b/cli/js/40_bench.js
new file mode 100644
index 000000000..b7a93038c
--- /dev/null
+++ b/cli/js/40_bench.js
@@ -0,0 +1,426 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+// deno-lint-ignore-file
+
+import { core, primordials } from "ext:core/mod.js";
+import {
+  escapeName,
+  pledgePermissions,
+  restorePermissions,
+} from "ext:cli/40_test_common.js";
+import { Console } from "ext:deno_console/01_console.js";
+import { setExitHandler } from "ext:runtime/30_os.js";
+const ops = core.ops;
+const {
+  ArrayPrototypePush,
+  Error,
+  MathCeil,
+  SymbolToStringTag,
+  TypeError,
+} = primordials;
+
+/** @type {number | null} */
+let currentBenchId = null;
+// These local variables are used to track time measurements at
+// `BenchContext::{start,end}` calls. They are global instead of using a state
+// map to minimise the overhead of assigning them.
+/** @type {number | null} */
+let currentBenchUserExplicitStart = null;
+/** @type {number | null} */
+let currentBenchUserExplicitEnd = null;
+
+let registeredWarmupBench = false;
+
+// Main bench function provided by Deno.
+function bench(
+  nameOrFnOrOptions,
+  optionsOrFn,
+  maybeFn,
+) {
+  if (!registeredWarmupBench) {
+    registeredWarmupBench = true;
+    const warmupBenchDesc = {
+      name: "<warmup>",
+      fn: function warmup() {},
+      async: false,
+      ignore: false,
+      baseline: false,
+      only: false,
+      sanitizeExit: true,
+      permissions: null,
+      warmup: true,
+    };
+    warmupBenchDesc.fn = wrapBenchmark(warmupBenchDesc);
+    const { id, origin } = ops.op_register_bench(warmupBenchDesc);
+    warmupBenchDesc.id = id;
+    warmupBenchDesc.origin = origin;
+  }
+
+  let benchDesc;
+  const defaults = {
+    ignore: false,
+    baseline: false,
+    only: false,
+    sanitizeExit: true,
+    permissions: null,
+  };
+
+  if (typeof nameOrFnOrOptions === "string") {
+    if (!nameOrFnOrOptions) {
+      throw new TypeError("The bench name can't be empty");
+    }
+    if (typeof optionsOrFn === "function") {
+      benchDesc = { fn: optionsOrFn, name: nameOrFnOrOptions, ...defaults };
+    } else {
+      if (!maybeFn || typeof maybeFn !== "function") {
+        throw new TypeError("Missing bench function");
+      }
+      if (optionsOrFn.fn != undefined) {
+        throw new TypeError(
+          "Unexpected 'fn' field in options, bench function is already provided as the third argument.",
+        );
+      }
+      if (optionsOrFn.name != undefined) {
+        throw new TypeError(
+          "Unexpected 'name' field in options, bench name is already provided as the first argument.",
+        );
+      }
+      benchDesc = {
+        ...defaults,
+        ...optionsOrFn,
+        fn: maybeFn,
+        name: nameOrFnOrOptions,
+      };
+    }
+  } else if (typeof nameOrFnOrOptions === "function") {
+    if (!nameOrFnOrOptions.name) {
+      throw new TypeError("The bench function must have a name");
+    }
+    if (optionsOrFn != undefined) {
+      throw new TypeError("Unexpected second argument to Deno.bench()");
+    }
+    if (maybeFn != undefined) {
+      throw new TypeError("Unexpected third argument to Deno.bench()");
+    }
+    benchDesc = {
+      ...defaults,
+      fn: nameOrFnOrOptions,
+      name: nameOrFnOrOptions.name,
+    };
+  } else {
+    let fn;
+    let name;
+    if (typeof optionsOrFn === "function") {
+      fn = optionsOrFn;
+      if (nameOrFnOrOptions.fn != undefined) {
+        throw new TypeError(
+          "Unexpected 'fn' field in options, bench function is already provided as the second argument.",
+        );
+      }
+      name = nameOrFnOrOptions.name ?? fn.name;
+    } else {
+      if (
+        !nameOrFnOrOptions.fn || typeof nameOrFnOrOptions.fn !== "function"
+      ) {
+        throw new TypeError(
+          "Expected 'fn' field in the first argument to be a bench function.",
+        );
+      }
+      fn = nameOrFnOrOptions.fn;
+      name = nameOrFnOrOptions.name ?? fn.name;
+    }
+    if (!name) {
+      throw new TypeError("The bench name can't be empty");
+    }
+    benchDesc = { ...defaults, ...nameOrFnOrOptions, fn, name };
+  }
+
+  const AsyncFunction = (async () => {}).constructor;
+  benchDesc.async = AsyncFunction === benchDesc.fn.constructor;
+  benchDesc.fn = wrapBenchmark(benchDesc);
+  benchDesc.warmup = false;
+  benchDesc.name = escapeName(benchDesc.name);
+
+  const { id, origin } = ops.op_register_bench(benchDesc);
+  benchDesc.id = id;
+  benchDesc.origin = origin;
+}
+
+function compareMeasurements(a, b) {
+  if (a > b) return 1;
+  if (a < b) return -1;
+
+  return 0;
+}
+
+function benchStats(
+  n,
+  highPrecision,
+  usedExplicitTimers,
+  avg,
+  min,
+  max,
+  all,
+) {
+  return {
+    n,
+    min,
+    max,
+    p75: all[MathCeil(n * (75 / 100)) - 1],
+    p99: all[MathCeil(n * (99 / 100)) - 1],
+    p995: all[MathCeil(n * (99.5 / 100)) - 1],
+    p999: all[MathCeil(n * (99.9 / 100)) - 1],
+    avg: !highPrecision ? (avg / n) : MathCeil(avg / n),
+    highPrecision,
+    usedExplicitTimers,
+  };
+}
+
+async function benchMeasure(timeBudget, fn, async, context) {
+  let n = 0;
+  let avg = 0;
+  let wavg = 0;
+  let usedExplicitTimers = false;
+  const all = [];
+  let min = Infinity;
+  let max = -Infinity;
+  const lowPrecisionThresholdInNs = 1e4;
+
+  // warmup step
+  let c = 0;
+  let iterations = 20;
+  let budget = 10 * 1e6;
+
+  if (!async) {
+    while (budget > 0 || iterations-- > 0) {
+      const t1 = benchNow();
+      fn(context);
+      const t2 = benchNow();
+      const totalTime = t2 - t1;
+      if (currentBenchUserExplicitStart !== null) {
+        currentBenchUserExplicitStart = null;
+        usedExplicitTimers = true;
+      }
+      if (currentBenchUserExplicitEnd !== null) {
+        currentBenchUserExplicitEnd = null;
+        usedExplicitTimers = true;
+      }
+
+      c++;
+      wavg += totalTime;
+      budget -= totalTime;
+    }
+  } else {
+    while (budget > 0 || iterations-- > 0) {
+      const t1 = benchNow();
+      await fn(context);
+      const t2 = benchNow();
+      const totalTime = t2 - t1;
+      if (currentBenchUserExplicitStart !== null) {
+        currentBenchUserExplicitStart = null;
+        usedExplicitTimers = true;
+      }
+      if (currentBenchUserExplicitEnd !== null) {
+        currentBenchUserExplicitEnd = null;
+        usedExplicitTimers = true;
+      }
+
+      c++;
+      wavg += totalTime;
+      budget -= totalTime;
+    }
+  }
+
+  wavg /= c;
+
+  // measure step
+  if (wavg > lowPrecisionThresholdInNs) {
+    let iterations = 10;
+    let budget = timeBudget * 1e6;
+
+    if (!async) {
+      while (budget > 0 || iterations-- > 0) {
+        const t1 = benchNow();
+        fn(context);
+        const t2 = benchNow();
+        const totalTime = t2 - t1;
+        let measuredTime = totalTime;
+        if (currentBenchUserExplicitStart !== null) {
+          measuredTime -= currentBenchUserExplicitStart - t1;
+          currentBenchUserExplicitStart = null;
+        }
+        if (currentBenchUserExplicitEnd !== null) {
+          measuredTime -= t2 - currentBenchUserExplicitEnd;
+          currentBenchUserExplicitEnd = null;
+        }
+
+        n++;
+        avg += measuredTime;
+        budget -= totalTime;
+        ArrayPrototypePush(all, measuredTime);
+        if (measuredTime < min) min = measuredTime;
+        if (measuredTime > max) max = measuredTime;
+      }
+    } else {
+      while (budget > 0 || iterations-- > 0) {
+        const t1 = benchNow();
+        await fn(context);
+        const t2 = benchNow();
+        const totalTime = t2 - t1;
+        let measuredTime = totalTime;
+        if (currentBenchUserExplicitStart !== null) {
+          measuredTime -= currentBenchUserExplicitStart - t1;
+          currentBenchUserExplicitStart = null;
+        }
+        if (currentBenchUserExplicitEnd !== null) {
+          measuredTime -= t2 - currentBenchUserExplicitEnd;
+          currentBenchUserExplicitEnd = null;
+        }
+
+        n++;
+        avg += measuredTime;
+        budget -= totalTime;
+        ArrayPrototypePush(all, measuredTime);
+        if (measuredTime < min) min = measuredTime;
+        if (measuredTime > max) max = measuredTime;
+      }
+    }
+  } else {
+    context.start = function start() {};
+    context.end = function end() {};
+    let iterations = 10;
+    let budget = timeBudget * 1e6;
+
+    if (!async) {
+      while (budget > 0 || iterations-- > 0) {
+        const t1 = benchNow();
+        for (let c = 0; c < lowPrecisionThresholdInNs; c++) {
+          fn(context);
+        }
+        const iterationTime = (benchNow() - t1) / lowPrecisionThresholdInNs;
+
+        n++;
+        avg += iterationTime;
+        ArrayPrototypePush(all, iterationTime);
+        if (iterationTime < min) min = iterationTime;
+        if (iterationTime > max) max = iterationTime;
+        budget -= iterationTime * lowPrecisionThresholdInNs;
+      }
+    } else {
+      while (budget > 0 || iterations-- > 0) {
+        const t1 = benchNow();
+        for (let c = 0; c < lowPrecisionThresholdInNs; c++) {
+          await fn(context);
+          currentBenchUserExplicitStart = null;
+          currentBenchUserExplicitEnd = null;
+        }
+        const iterationTime = (benchNow() - t1) / lowPrecisionThresholdInNs;
+
+        n++;
+        avg += iterationTime;
+        ArrayPrototypePush(all, iterationTime);
+        if (iterationTime < min) min = iterationTime;
+        if (iterationTime > max) max = iterationTime;
+        budget -= iterationTime * lowPrecisionThresholdInNs;
+      }
+    }
+  }
+
+  all.sort(compareMeasurements);
+  return benchStats(
+    n,
+    wavg > lowPrecisionThresholdInNs,
+    usedExplicitTimers,
+    avg,
+    min,
+    max,
+    all,
+  );
+}
+
+/** @param desc {BenchDescription} */
+function createBenchContext(desc) {
+  return {
+    [SymbolToStringTag]: "BenchContext",
+    name: desc.name,
+    origin: desc.origin,
+    start() {
+      if (currentBenchId !== desc.id) {
+        throw new TypeError(
+          "The benchmark which this context belongs to is not being executed.",
+        );
+      }
+      if (currentBenchUserExplicitStart != null) {
+        throw new TypeError(
+          "BenchContext::start() has already been invoked.",
+        );
+      }
+      currentBenchUserExplicitStart = benchNow();
+    },
+    end() {
+      const end = benchNow();
+      if (currentBenchId !== desc.id) {
+        throw new TypeError(
+          "The benchmark which this context belongs to is not being executed.",
+        );
+      }
+      if (currentBenchUserExplicitEnd != null) {
+        throw new TypeError("BenchContext::end() has already been invoked.");
+      }
+      currentBenchUserExplicitEnd = end;
+    },
+  };
+}
+
+/** Wrap a user benchmark function in one which returns a structured result. */
+function wrapBenchmark(desc) {
+  const fn = desc.fn;
+  return async function outerWrapped() {
+    let token = null;
+    const originalConsole = globalThis.console;
+    currentBenchId = desc.id;
+
+    try {
+      globalThis.console = new Console((s) => {
+        ops.op_dispatch_bench_event({ output: s });
+      });
+
+      if (desc.permissions) {
+        token = pledgePermissions(desc.permissions);
+      }
+
+      if (desc.sanitizeExit) {
+        setExitHandler((exitCode) => {
+          throw new Error(
+            `Bench attempted to exit with exit code: ${exitCode}`,
+          );
+        });
+      }
+
+      const benchTimeInMs = 500;
+      const context = createBenchContext(desc);
+      const stats = await benchMeasure(
+        benchTimeInMs,
+        fn,
+        desc.async,
+        context,
+      );
+
+      return { ok: stats };
+    } catch (error) {
+      return { failed: core.destructureError(error) };
+    } finally {
+      globalThis.console = originalConsole;
+      currentBenchId = null;
+      currentBenchUserExplicitStart = null;
+      currentBenchUserExplicitEnd = null;
+      if (bench.sanitizeExit) setExitHandler(null);
+      if (token !== null) restorePermissions(token);
+    }
+  };
+}
+
+function benchNow() {
+  return ops.op_bench_now();
+}
+
+globalThis.Deno.bench = bench;
diff --git a/cli/js/40_testing.js b/cli/js/40_test.js
index 23a8da71b..750cbe7db 100644
--- a/cli/js/40_testing.js
+++ b/cli/js/40_test.js
@@ -1,7 +1,8 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
-// deno-lint-ignore-file
 
 import { core, primordials } from "ext:core/mod.js";
+import { escapeName, withPermissions } from "ext:cli/40_test_common.js";
+
 const ops = core.ops;
 const {
   ArrayPrototypeFilter,
@@ -14,21 +15,76 @@ const {
   MapPrototypeGet,
   MapPrototypeHas,
   MapPrototypeSet,
-  MathCeil,
   ObjectKeys,
   Promise,
   SafeArrayIterator,
   Set,
-  StringPrototypeReplaceAll,
   SymbolToStringTag,
   TypeError,
 } = primordials;
 
 import { setExitHandler } from "ext:runtime/30_os.js";
-import { Console } from "ext:deno_console/01_console.js";
-import { serializePermissions } from "ext:runtime/10_permissions.js";
 import { setTimeout } from "ext:deno_web/02_timers.js";
 
+/**
+ * @typedef {{
+ *   id: number,
+ *   name: string,
+ *   fn: TestFunction
+ *   origin: string,
+ *   location: TestLocation,
+ *   ignore: boolean,
+ *   only: boolean.
+ *   sanitizeOps: boolean,
+ *   sanitizeResources: boolean,
+ *   sanitizeExit: boolean,
+ *   permissions: PermissionOptions,
+ * }} TestDescription
+ *
+ * @typedef {{
+ *   id: number,
+ *   name: string,
+ *   fn: TestFunction
+ *   origin: string,
+ *   location: TestLocation,
+ *   ignore: boolean,
+ *   level: number,
+ *   parent: TestDescription | TestStepDescription,
+ *   rootId: number,
+ *   rootName: String,
+ *   sanitizeOps: boolean,
+ *   sanitizeResources: boolean,
+ *   sanitizeExit: boolean,
+ * }} TestStepDescription
+ *
+ * @typedef {{
+ *   context: TestContext,
+ *   children: TestStepDescription[],
+ *   completed: boolean,
+ * }} TestState
+ *
+ * @typedef {{
+ *   context: TestContext,
+ *   children: TestStepDescription[],
+ *   completed: boolean,
+ *   failed: boolean,
+ * }} TestStepState
+ *
+ * @typedef {{
+ *   id: number,
+ *   name: string,
+ *   fn: BenchFunction
+ *   origin: string,
+ *   ignore: boolean,
+ *   only: boolean.
+ *   sanitizeExit: boolean,
+ *   permissions: PermissionOptions,
+ * }} BenchDescription
+ */
+
+/** @type {Map<number, TestState | TestStepState>} */
+const testStates = new Map();
+
 const opSanitizerDelayResolveQueue = [];
 let hasSetOpSanitizerDelayMacrotask = false;
 
@@ -560,126 +616,6 @@ function wrapInner(fn) {
   };
 }
 
-function pledgePermissions(permissions) {
-  return ops.op_pledge_test_permissions(
-    serializePermissions(permissions),
-  );
-}
-
-function restorePermissions(token) {
-  ops.op_restore_test_permissions(token);
-}
-
-function withPermissions(fn, permissions) {
-  return async function applyPermissions(...params) {
-    const token = pledgePermissions(permissions);
-
-    try {
-      return await fn(...new SafeArrayIterator(params));
-    } finally {
-      restorePermissions(token);
-    }
-  };
-}
-
-const ESCAPE_ASCII_CHARS = [
-  ["\b", "\\b"],
-  ["\f", "\\f"],
-  ["\t", "\\t"],
-  ["\n", "\\n"],
-  ["\r", "\\r"],
-  ["\v", "\\v"],
-];
-
-/**
- * @param {string} name
- * @returns {string}
- */
-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;
-}
-
-/**
- * @typedef {{
- *   id: number,
- *   name: string,
- *   fn: TestFunction
- *   origin: string,
- *   location: TestLocation,
- *   ignore: boolean,
- *   only: boolean.
- *   sanitizeOps: boolean,
- *   sanitizeResources: boolean,
- *   sanitizeExit: boolean,
- *   permissions: PermissionOptions,
- * }} TestDescription
- *
- * @typedef {{
- *   id: number,
- *   name: string,
- *   fn: TestFunction
- *   origin: string,
- *   location: TestLocation,
- *   ignore: boolean,
- *   level: number,
- *   parent: TestDescription | TestStepDescription,
- *   rootId: number,
- *   rootName: String,
- *   sanitizeOps: boolean,
- *   sanitizeResources: boolean,
- *   sanitizeExit: boolean,
- * }} TestStepDescription
- *
- * @typedef {{
- *   context: TestContext,
- *   children: TestStepDescription[],
- *   completed: boolean,
- * }} TestState
- *
- * @typedef {{
- *   context: TestContext,
- *   children: TestStepDescription[],
- *   completed: boolean,
- *   failed: boolean,
- * }} TestStepState
- *
- * @typedef {{
- *   id: number,
- *   name: string,
- *   fn: BenchFunction
- *   origin: string,
- *   ignore: boolean,
- *   only: boolean.
- *   sanitizeExit: boolean,
- *   permissions: PermissionOptions,
- * }} BenchDescription
- */
-
-/** @type {Map<number, TestState | TestStepState>} */
-const testStates = new Map();
-/** @type {number | null} */
-let currentBenchId = null;
-// These local variables are used to track time measurements at
-// `BenchContext::{start,end}` calls. They are global instead of using a state
-// map to minimise the overhead of assigning them.
-/** @type {number | null} */
-let currentBenchUserExplicitStart = null;
-/** @type {number | null} */
-let currentBenchUserExplicitEnd = null;
-
 const registerTestIdRetBuf = new Uint32Array(1);
 const registerTestIdRetBufU8 = new Uint8Array(registerTestIdRetBuf.buffer);
 
@@ -689,10 +625,6 @@ function testInner(
   maybeFn,
   overrides = {},
 ) {
-  if (typeof ops.op_register_test != "function") {
-    return;
-  }
-
   let testDesc;
   const defaults = {
     ignore: false,
@@ -822,405 +754,6 @@ test.only = function (
   return testInner(nameOrFnOrOptions, optionsOrFn, maybeFn, { only: true });
 };
 
-let registeredWarmupBench = false;
-
-// Main bench function provided by Deno.
-function bench(
-  nameOrFnOrOptions,
-  optionsOrFn,
-  maybeFn,
-) {
-  if (typeof ops.op_register_bench != "function") {
-    return;
-  }
-
-  if (!registeredWarmupBench) {
-    registeredWarmupBench = true;
-    const warmupBenchDesc = {
-      name: "<warmup>",
-      fn: function warmup() {},
-      async: false,
-      ignore: false,
-      baseline: false,
-      only: false,
-      sanitizeExit: true,
-      permissions: null,
-      warmup: true,
-    };
-    warmupBenchDesc.fn = wrapBenchmark(warmupBenchDesc);
-    const { id, origin } = ops.op_register_bench(warmupBenchDesc);
-    warmupBenchDesc.id = id;
-    warmupBenchDesc.origin = origin;
-  }
-
-  let benchDesc;
-  const defaults = {
-    ignore: false,
-    baseline: false,
-    only: false,
-    sanitizeExit: true,
-    permissions: null,
-  };
-
-  if (typeof nameOrFnOrOptions === "string") {
-    if (!nameOrFnOrOptions) {
-      throw new TypeError("The bench name can't be empty");
-    }
-    if (typeof optionsOrFn === "function") {
-      benchDesc = { fn: optionsOrFn, name: nameOrFnOrOptions, ...defaults };
-    } else {
-      if (!maybeFn || typeof maybeFn !== "function") {
-        throw new TypeError("Missing bench function");
-      }
-      if (optionsOrFn.fn != undefined) {
-        throw new TypeError(
-          "Unexpected 'fn' field in options, bench function is already provided as the third argument.",
-        );
-      }
-      if (optionsOrFn.name != undefined) {
-        throw new TypeError(
-          "Unexpected 'name' field in options, bench name is already provided as the first argument.",
-        );
-      }
-      benchDesc = {
-        ...defaults,
-        ...optionsOrFn,
-        fn: maybeFn,
-        name: nameOrFnOrOptions,
-      };
-    }
-  } else if (typeof nameOrFnOrOptions === "function") {
-    if (!nameOrFnOrOptions.name) {
-      throw new TypeError("The bench function must have a name");
-    }
-    if (optionsOrFn != undefined) {
-      throw new TypeError("Unexpected second argument to Deno.bench()");
-    }
-    if (maybeFn != undefined) {
-      throw new TypeError("Unexpected third argument to Deno.bench()");
-    }
-    benchDesc = {
-      ...defaults,
-      fn: nameOrFnOrOptions,
-      name: nameOrFnOrOptions.name,
-    };
-  } else {
-    let fn;
-    let name;
-    if (typeof optionsOrFn === "function") {
-      fn = optionsOrFn;
-      if (nameOrFnOrOptions.fn != undefined) {
-        throw new TypeError(
-          "Unexpected 'fn' field in options, bench function is already provided as the second argument.",
-        );
-      }
-      name = nameOrFnOrOptions.name ?? fn.name;
-    } else {
-      if (
-        !nameOrFnOrOptions.fn || typeof nameOrFnOrOptions.fn !== "function"
-      ) {
-        throw new TypeError(
-          "Expected 'fn' field in the first argument to be a bench function.",
-        );
-      }
-      fn = nameOrFnOrOptions.fn;
-      name = nameOrFnOrOptions.name ?? fn.name;
-    }
-    if (!name) {
-      throw new TypeError("The bench name can't be empty");
-    }
-    benchDesc = { ...defaults, ...nameOrFnOrOptions, fn, name };
-  }
-
-  const AsyncFunction = (async () => {}).constructor;
-  benchDesc.async = AsyncFunction === benchDesc.fn.constructor;
-  benchDesc.fn = wrapBenchmark(benchDesc);
-  benchDesc.warmup = false;
-  benchDesc.name = escapeName(benchDesc.name);
-
-  const { id, origin } = ops.op_register_bench(benchDesc);
-  benchDesc.id = id;
-  benchDesc.origin = origin;
-}
-
-function compareMeasurements(a, b) {
-  if (a > b) return 1;
-  if (a < b) return -1;
-
-  return 0;
-}
-
-function benchStats(
-  n,
-  highPrecision,
-  usedExplicitTimers,
-  avg,
-  min,
-  max,
-  all,
-) {
-  return {
-    n,
-    min,
-    max,
-    p75: all[MathCeil(n * (75 / 100)) - 1],
-    p99: all[MathCeil(n * (99 / 100)) - 1],
-    p995: all[MathCeil(n * (99.5 / 100)) - 1],
-    p999: all[MathCeil(n * (99.9 / 100)) - 1],
-    avg: !highPrecision ? (avg / n) : MathCeil(avg / n),
-    highPrecision,
-    usedExplicitTimers,
-  };
-}
-
-async function benchMeasure(timeBudget, fn, async, context) {
-  let n = 0;
-  let avg = 0;
-  let wavg = 0;
-  let usedExplicitTimers = false;
-  const all = [];
-  let min = Infinity;
-  let max = -Infinity;
-  const lowPrecisionThresholdInNs = 1e4;
-
-  // warmup step
-  let c = 0;
-  let iterations = 20;
-  let budget = 10 * 1e6;
-
-  if (!async) {
-    while (budget > 0 || iterations-- > 0) {
-      const t1 = benchNow();
-      fn(context);
-      const t2 = benchNow();
-      const totalTime = t2 - t1;
-      if (currentBenchUserExplicitStart !== null) {
-        currentBenchUserExplicitStart = null;
-        usedExplicitTimers = true;
-      }
-      if (currentBenchUserExplicitEnd !== null) {
-        currentBenchUserExplicitEnd = null;
-        usedExplicitTimers = true;
-      }
-
-      c++;
-      wavg += totalTime;
-      budget -= totalTime;
-    }
-  } else {
-    while (budget > 0 || iterations-- > 0) {
-      const t1 = benchNow();
-      await fn(context);
-      const t2 = benchNow();
-      const totalTime = t2 - t1;
-      if (currentBenchUserExplicitStart !== null) {
-        currentBenchUserExplicitStart = null;
-        usedExplicitTimers = true;
-      }
-      if (currentBenchUserExplicitEnd !== null) {
-        currentBenchUserExplicitEnd = null;
-        usedExplicitTimers = true;
-      }
-
-      c++;
-      wavg += totalTime;
-      budget -= totalTime;
-    }
-  }
-
-  wavg /= c;
-
-  // measure step
-  if (wavg > lowPrecisionThresholdInNs) {
-    let iterations = 10;
-    let budget = timeBudget * 1e6;
-
-    if (!async) {
-      while (budget > 0 || iterations-- > 0) {
-        const t1 = benchNow();
-        fn(context);
-        const t2 = benchNow();
-        const totalTime = t2 - t1;
-        let measuredTime = totalTime;
-        if (currentBenchUserExplicitStart !== null) {
-          measuredTime -= currentBenchUserExplicitStart - t1;
-          currentBenchUserExplicitStart = null;
-        }
-        if (currentBenchUserExplicitEnd !== null) {
-          measuredTime -= t2 - currentBenchUserExplicitEnd;
-          currentBenchUserExplicitEnd = null;
-        }
-
-        n++;
-        avg += measuredTime;
-        budget -= totalTime;
-        ArrayPrototypePush(all, measuredTime);
-        if (measuredTime < min) min = measuredTime;
-        if (measuredTime > max) max = measuredTime;
-      }
-    } else {
-      while (budget > 0 || iterations-- > 0) {
-        const t1 = benchNow();
-        await fn(context);
-        const t2 = benchNow();
-        const totalTime = t2 - t1;
-        let measuredTime = totalTime;
-        if (currentBenchUserExplicitStart !== null) {
-          measuredTime -= currentBenchUserExplicitStart - t1;
-          currentBenchUserExplicitStart = null;
-        }
-        if (currentBenchUserExplicitEnd !== null) {
-          measuredTime -= t2 - currentBenchUserExplicitEnd;
-          currentBenchUserExplicitEnd = null;
-        }
-
-        n++;
-        avg += measuredTime;
-        budget -= totalTime;
-        ArrayPrototypePush(all, measuredTime);
-        if (measuredTime < min) min = measuredTime;
-        if (measuredTime > max) max = measuredTime;
-      }
-    }
-  } else {
-    context.start = function start() {};
-    context.end = function end() {};
-    let iterations = 10;
-    let budget = timeBudget * 1e6;
-
-    if (!async) {
-      while (budget > 0 || iterations-- > 0) {
-        const t1 = benchNow();
-        for (let c = 0; c < lowPrecisionThresholdInNs; c++) {
-          fn(context);
-        }
-        const iterationTime = (benchNow() - t1) / lowPrecisionThresholdInNs;
-
-        n++;
-        avg += iterationTime;
-        ArrayPrototypePush(all, iterationTime);
-        if (iterationTime < min) min = iterationTime;
-        if (iterationTime > max) max = iterationTime;
-        budget -= iterationTime * lowPrecisionThresholdInNs;
-      }
-    } else {
-      while (budget > 0 || iterations-- > 0) {
-        const t1 = benchNow();
-        for (let c = 0; c < lowPrecisionThresholdInNs; c++) {
-          await fn(context);
-          currentBenchUserExplicitStart = null;
-          currentBenchUserExplicitEnd = null;
-        }
-        const iterationTime = (benchNow() - t1) / lowPrecisionThresholdInNs;
-
-        n++;
-        avg += iterationTime;
-        ArrayPrototypePush(all, iterationTime);
-        if (iterationTime < min) min = iterationTime;
-        if (iterationTime > max) max = iterationTime;
-        budget -= iterationTime * lowPrecisionThresholdInNs;
-      }
-    }
-  }
-
-  all.sort(compareMeasurements);
-  return benchStats(
-    n,
-    wavg > lowPrecisionThresholdInNs,
-    usedExplicitTimers,
-    avg,
-    min,
-    max,
-    all,
-  );
-}
-
-/** @param desc {BenchDescription} */
-function createBenchContext(desc) {
-  return {
-    [SymbolToStringTag]: "BenchContext",
-    name: desc.name,
-    origin: desc.origin,
-    start() {
-      if (currentBenchId !== desc.id) {
-        throw new TypeError(
-          "The benchmark which this context belongs to is not being executed.",
-        );
-      }
-      if (currentBenchUserExplicitStart != null) {
-        throw new TypeError(
-          "BenchContext::start() has already been invoked.",
-        );
-      }
-      currentBenchUserExplicitStart = benchNow();
-    },
-    end() {
-      const end = benchNow();
-      if (currentBenchId !== desc.id) {
-        throw new TypeError(
-          "The benchmark which this context belongs to is not being executed.",
-        );
-      }
-      if (currentBenchUserExplicitEnd != null) {
-        throw new TypeError("BenchContext::end() has already been invoked.");
-      }
-      currentBenchUserExplicitEnd = end;
-    },
-  };
-}
-
-/** Wrap a user benchmark function in one which returns a structured result. */
-function wrapBenchmark(desc) {
-  const fn = desc.fn;
-  return async function outerWrapped() {
-    let token = null;
-    const originalConsole = globalThis.console;
-    currentBenchId = desc.id;
-
-    try {
-      globalThis.console = new Console((s) => {
-        ops.op_dispatch_bench_event({ output: s });
-      });
-
-      if (desc.permissions) {
-        token = pledgePermissions(desc.permissions);
-      }
-
-      if (desc.sanitizeExit) {
-        setExitHandler((exitCode) => {
-          throw new Error(
-            `Bench attempted to exit with exit code: ${exitCode}`,
-          );
-        });
-      }
-
-      const benchTimeInMs = 500;
-      const context = createBenchContext(desc);
-      const stats = await benchMeasure(
-        benchTimeInMs,
-        fn,
-        desc.async,
-        context,
-      );
-
-      return { ok: stats };
-    } catch (error) {
-      return { failed: core.destructureError(error) };
-    } finally {
-      globalThis.console = originalConsole;
-      currentBenchId = null;
-      currentBenchUserExplicitStart = null;
-      currentBenchUserExplicitEnd = null;
-      if (bench.sanitizeExit) setExitHandler(null);
-      if (token !== null) restorePermissions(token);
-    }
-  };
-}
-
-function benchNow() {
-  return ops.op_bench_now();
-}
-
 function getFullName(desc) {
   if ("parent" in desc) {
     return `${getFullName(desc.parent)} ... ${desc.name}`;
@@ -1388,5 +921,4 @@ function wrapTest(desc) {
   return wrapOuter(testFn, desc);
 }
 
-globalThis.Deno.bench = bench;
 globalThis.Deno.test = test;
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);
+    }
+  };
+}