test: add WPT console-label-conversion test

Add console-label-conversion.any.js from WPT to the test suite.

PR-URL: #23340
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

test/parallel/test-whatwg-console-label-conversion.js

@@ -0,0 +1,45 @@
+'use strict';
+
+require('../common');
+
+const { test, assert_true, assert_throws } =
+  require('../common/wpt');
+
+/* eslint-disable max-len, object-curly-spacing */
+
+/* The following tests should not be modified as they are copied */
+/* WPT Refs:
+   https://github.com/web-platform-tests/wpt/blob/6f0a96ed650935b17b6e5d277889cfbe0ccc103e/console/console-label-conversion.any.js
+   License: hhttps://github.com/web-platform-tests/wpt/blob/6f0a96ed650935b17b6e5d277889cfbe0ccc103e/LICENSE.md
+*/
+
+// https://console.spec.whatwg/org/#counting
+// https://console.spec.whatwg/org/#timing
+
+const methods = ['count', 'countReset', 'time', 'timeLog', 'timeEnd'];
+
+for (const method of methods) {
+  test(() => {
+    let labelToStringCalled = false;
+
+    console[method]({
+      toString() {
+        labelToStringCalled = true;
+      }
+    });
+
+    assert_true(labelToStringCalled, `${method}() must call toString() on label when label is an object`);
+  }, `console.${method}()'s label gets converted to string via label.toString() when label is an object`);
+
+  test(() => {
+    assert_throws({name: 'Error'}, () => {
+      console[method]({
+        toString() {
+          throw new Error('conversion error');
+        }
+      });
+    }, `${method} must re-throw any exceptions thrown by label.toString() conversion`);
+  }, `console.${method}() throws exceptions generated by erroneous label.toString() conversion`);
+}
+
+/* eslint-enable */