test: better assertion for async hook tests

The existing assertion was misleading to whether there were too few or
too many events of a particular type. Improve the assertion message.

PR-URL: #27601
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: ofrobots

test/async-hooks/verify-graph.js

@@ -108,7 +108,8 @@ module.exports = function verifyGraph(hooks, graph) {
 
   for (const type in expTypes) {
     assert.strictEqual(typeSeen[type], expTypes[type],
-                       `Expecting type '${type}' in graph`);
+                       `Type '${type}': expecting: ${expTypes[type]} ` +
+                       `found ${typeSeen[type]}`);
   }
 };