perf: move "cli/js/40_testing.js" out of main snapshot (#21212)

Closes https://github.com/denoland/deno/issues/21136

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

cli/args/flags.rs

@@ -320,8 +320,16 @@ impl DenoSubcommand {
     matches!(self, Self::Run(_))
   }
 
-  pub fn is_test_or_jupyter(&self) -> bool {
-    matches!(self, Self::Test(_) | Self::Jupyter(_))
+  // Returns `true` if the subcommand depends on testing infrastructure.
+  pub fn needs_test(&self) -> bool {
+    matches!(
+      self,
+      Self::Test(_)
+        | Self::Jupyter(_)
+        | Self::Repl(_)
+        | Self::Bench(_)
+        | Self::Lsp
+    )
   }
 }
 

cli/build.rs

@@ -331,7 +331,6 @@ deno_core::extension!(
   esm_entry_point = "ext:cli/99_main.js",
   esm = [
     dir "js",
-    "40_testing.js",
     "99_main.js"
   ],
   customizer = |ext: &mut deno_core::Extension| {

cli/js/40_jupyter.js

@@ -36,7 +36,7 @@
  * }, { raw: true });
  * ```
  */
-{
+(() => {
   const internals = Deno[Deno.internal];
   const core = internals.core;
 
@@ -428,4 +428,4 @@
   }
 
   internals.enableJupyter = enableJupyter;
-}
+})();

cli/js/99_main.js

@@ -1,3 +1,2 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-import "ext:cli/40_testing.js";
 import "ext:cli/runtime/js/99_main.js";

cli/worker.rs

@@ -639,9 +639,13 @@ impl CliMainWorkerFactory {
       options,
     );
 
-    if self.shared.subcommand.is_test_or_jupyter() {
+    if self.shared.subcommand.needs_test() {
       worker.js_runtime.execute_script_static(
-        "40_jupyter.js",
+        "ext:cli/40_testing.js",
+        include_str!("js/40_testing.js"),
+      )?;
+      worker.js_runtime.execute_script_static(
+        "ext:cli/40_jupyter.js",
         include_str!("js/40_jupyter.js"),
       )?;
     }

runtime/js/99_main.js

@@ -448,6 +448,11 @@ const finalDenoNs = {
   resources: core.resources,
   close: core.close,
   ...denoNs,
+  // Deno.test and Deno.bench are noops here, but kept for compatibility; so
+  // that they don't cause errors when used outside of `deno test`/`deno bench`
+  // contexts.
+  test: () => {},
+  bench: () => {},
 };
 
 const {