test: allow running with NODE_PENDING_DEPRECATION

Make the test for pending deprecations work when the env var
is set during the whole test suite run.

PR-URL: #18991
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: Tiancheng "Timothy" Gu <[email protected]>
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: Сковорода Никита Андреевич <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Matheus Marchini <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>

Author: addaleax

test/parallel/test-pending-deprecation.js

@@ -25,7 +25,8 @@ switch (process.argv[2]) {
     break;
   default:
     // Verify that the flag is off by default.
-    assert.strictEqual(config.pendingDeprecation, undefined);
+    const envvar = process.env.NODE_PENDING_DEPRECATION;
+    assert.strictEqual(config.pendingDeprecation, envvar && envvar[0] === '1');
 
     // Test the --pending-deprecation command line switch.
     fork(__filename, ['switch'], {