Bug 1523562 [wpt PR 15016] - Add assert descriptions to Web Locks tes…

…t to aid debugging, a=testonly

Automatic update from web-platform-tests
Add assert descriptions to Web Locks test to aid debugging (#15016)

For web-platform-tests/wpt#15015.
--

wpt-commits: 4ac3172e8d86ade4a9ded497bd10a1124fc6e231
wpt-pr: 15016

UltraBlame original commit: d6f60b92b7532559e81938730896ed4e1c266534

testing/web-platform/tests/web-locks/signal.tentative.https.any.js

@@ -50,8 +50,10 @@ promise_test(async t => {
 
 
   const state = await navigator.locks.query();
-  assert_equals(state.held.filter(lock => lock.name === res).length, 1);
-  assert_equals(state.pending.filter(lock => lock.name === res).length, 1);
+  assert_equals(state.held.filter(lock => lock.name === res).length, 1,
+                'Number of held locks');
+  assert_equals(state.pending.filter(lock => lock.name === res).length, 1,
+                'Number of pending locks');
 
   const rejected = promise_rejects(
     t, 'AbortError', promise, 'Request should reject with AbortError');
@@ -76,8 +78,10 @@ promise_test(async t => {
 
 
   const state = await navigator.locks.query();
-  assert_equals(state.held.filter(lock => lock.name === res).length, 1);
-  assert_equals(state.pending.filter(lock => lock.name === res).length, 1);
+  assert_equals(state.held.filter(lock => lock.name === res).length, 1,
+                'Number of held locks');
+  assert_equals(state.pending.filter(lock => lock.name === res).length, 1,
+                'Number of pending locks');
 
   const rejected = promise_rejects(
     t, 'AbortError', promise, 'Request should reject with AbortError');