assert: provide info about actual error

In case a error is caught in `assert.doesNotThrow` or
`assert.doesNotReject` it will now also indicate what the real
error message was.

PR-URL: https://github.com/nodejs/node/pull/19884
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/test/parallel/test-assert-async.js b/test/parallel/test-assert-async.js
index b6b744c9b1..cc557d504a 100644
--- a/test/parallel/test-assert-async.js
+++ b/test/parallel/test-assert-async.js
@@ -34,7 +34,8 @@ common.crashOnUnhandledRejection();
         assert(err instanceof assert.AssertionError,
                `${err.name} is not instance of AssertionError`);
         assert.strictEqual(err.code, 'ERR_ASSERTION');
-        assert(/^Got unwanted rejection\.\n$/.test(err.message));
+        assert.strictEqual(err.message,
+                           'Got unwanted rejection.\nActual message: ""');
         assert.strictEqual(err.operator, 'doesNotReject');
         assert.ok(!err.stack.includes('at Function.doesNotReject'));
         return true;