1 files changed, 29 insertions, 0 deletions
diff --git a/testing/web-platform/tests/console/console-label-conversion.any.js b/testing/web-platform/tests/console/console-label-conversion.any.js
new file mode 100644
index 0000000000..4d48df3b1d
--- /dev/null
+++ b/testing/web-platform/tests/console/console-label-conversion.any.js
@@ -0,0 +1,29 @@
+"use strict";
+// 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_js(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`);
+}