[Tests] improve some failure output by adding messages

Author: ljharb

test/async-await.js

@@ -122,9 +122,9 @@ tap.test('async5', function (t) {
             'ok 2 after server',
             'ok 3 before request',
             'ok 4 after request',
-            'ok 5 should be equal',
-            'ok 6 should be equal',
-            'ok 7 undefined',
+            'ok 5 res.statusCode is 200',
+            'ok 6 mockDb.state is new',
+            'ok 7 error on close',
             'not ok 8 .end() called twice',
             '  ---',
             '    operator: fail',

test/async-await/async5.js

@@ -40,18 +40,18 @@ test('async5', async function myTest(t) {
         t.ok(true, 'after request');
 
         res.resume();
-        t.equal(res.statusCode, 200);
+        t.equal(res.statusCode, 200, 'res.statusCode is 200');
 
         setTimeout(function () {
-            t.equal(mockDb.state, 'new');
+            t.equal(mockDb.state, 'new', 'mockDb.state is new');
 
             server.close(function (err) {
-                t.ifError(err);
+                t.ifError(err, 'error on close');
                 t.end();
             });
         }, 50);
     } catch (err) {
-        t.ifError(err);
+        t.ifError(err, 'error in catch');
         t.end();
     }
 });