chore: cleanup tests and small fix on mockfs.bypass

.github/workflows/test.yml

@@ -28,11 +28,15 @@ jobs:
           - 8
           - 10
           - 12
+          - 14
         exclude:
-          # Temporarily excludes node 12 on windows
-          # Wait for https://github.com/nodejs/node/issues/34514
+          # Excludes nodejs v12 and v14 on windows
+          # https://github.com/nodejs/node/issues/34514
+          # It was patched in nodejs v15+.
           - os: windows-latest
             node: 12
+          - os: windows-latest
+            node: 14
 
     steps:
       - name: Clone repository

lib/bypass.js

@@ -19,8 +19,17 @@ exports = module.exports = function bypass(fn) {
   try {
     result = fn();
   } finally {
-    if (result && typeof result.finally === 'function') {
-      result.finally(enable);
+    if (result && typeof result.then === 'function') {
+      result.then(
+        r => {
+          enable();
+          return r;
+        },
+        err => {
+          enable();
+          throw err;
+        }
+      );
     } else {
       enable();
     }