[Fixes #15953] Implement assert.expect in each unit test

[Fixes #15953] Implement `assert.expect` in each unit test

js/tests/index.html

@@ -14,6 +14,8 @@
     <script>
       // See https://github.com/axemclion/grunt-saucelabs#test-result-details-with-qunit
       var log = []
+      // Require assert.expect in each test.
+      QUnit.config.requireExpects = true
       QUnit.done(function (testResults) {
         var tests = []
         for (var i = 0, len = log.length; i < len; i++) {