test_runner: refactor Promise chain in run()

This commit refactors the chain of functions in run() to use an async function instead of creating an awkward primordial-based Promise chain.

Author: cjihrig

lib/internal/test_runner/runner.js

@@ -17,7 +17,6 @@ const {
  ArrayPrototypeSort,
  ObjectAssign,
  PromisePrototypeThen,
- PromiseResolve,
  PromiseWithResolvers,
  SafeMap,
  SafePromiseAll,
@@ -801,9 +800,23 @@ function run(options = kEmptyObject) {
  }
  }
 
- const setupPromise = PromiseResolve(setup?.(root.reporter));
- PromisePrototypeThen(PromisePrototypeThen(PromisePrototypeThen(setupPromise, runFiles), postRun), teardown);
+ const runChain = async () => {
+ if (typeof setup === 'function') {
+ await setup(root.reporter);
+ }
+
+ await runFiles();
+
+ if (typeof postRun === 'function') {
+ postRun();
+ }
+
+ if (typeof teardown === 'function') {
+ teardown();
+ }
+ };
 
+ runChain();
  return root.reporter;
 }