chore: mock stealthy-require in tests (#9855)

Author: SimenB

packages/jest-runtime/src/index.ts

@@ -155,6 +155,7 @@ class Runtime {
   private _virtualMocks: BooleanObject;
   private _moduleImplementation?: typeof nativeModule.Module;
   private jestObjectCaches: Map<string, Jest>;
+  private _hasWarnedAboutRequireCacheModification = false;
 
   constructor(
     config: Config.ProjectConfig,
@@ -1302,7 +1303,13 @@ class Runtime {
     moduleRequire.resolve = resolve;
     moduleRequire.cache = (() => {
       const notPermittedMethod = () => {
-        console.warn('`require.cache` modification is not permitted');
+        if (!this._hasWarnedAboutRequireCacheModification) {
+          this._environment.global.console.warn(
+            '`require.cache` modification is not permitted',
+          );
+
+          this._hasWarnedAboutRequireCacheModification = true;
+        }
         return true;
       };
       return new Proxy<RequireCache>(Object.create(null), {

testSetupFile.js

@@ -8,3 +8,6 @@
 // Some of the `jest-runtime` tests are very slow and cause
 // timeouts on travis
 jest.setTimeout(70000);
+
+// this module does some funky stuff with `require.cache`, flooding the terminal with output
+jest.mock('stealthy-require', () => (_, m) => m());