Restore test harness on CI

The test harness haven't been accurately reporting failures, this
restores it.

bin/run-tests.mjs

@@ -51,25 +51,31 @@ const browser = await puppeteer.launch({
 
 console.log('[ci] puppeteer launched');
 
-await /** @type {Promise<void>} */ (
-  // eslint-disable-next-line no-async-promise-executor
-  new Promise(async (fulfill) => {
-    const page = await browser.newPage();
-
-    page.on('console', (msg) => {
-      const location = msg.location();
-      const text = msg.text();
-
-      if (location.url?.includes(`/qunit.js`)) {
-        console.log(text);
-      } else if (text === `[HARNESS] done`) {
-        fulfill();
-      }
-    });
-
-    await page.goto('http://localhost:60173?hidepassed&ci');
-  })
-);
+try {
+  await /** @type {Promise<void>} */ (
+    new Promise(async (fulfill, reject) => {
+      const page = await browser.newPage();
+
+      page.on('console', (msg) => {
+        const location = msg.location();
+        const text = msg.text();
+
+        if (location.url?.includes(`/qunit.js`)) {
+          console.log(text);
+        } else if (text === `[HARNESS] done`) {
+          fulfill();
+        } else if (text === `[HARNESS] fail`) {
+          reject();
+        }
+      });
+
+      await page.goto('http://localhost:60173?hidepassed&ci');
+    })
+  );
+} catch {
+  await browser.close();
+  process.exit(1);
+}
 
 await browser.close();
 

packages/@glimmer-workspace/integration-tests/lib/setup-harness.ts

@@ -63,8 +63,12 @@ export async function setupQunit() {
     qunit.moduleDone(pause);
   }
 
-  qunit.done(() => {
-    console.log('[HARNESS] done');
+  qunit.done(({ failed }) => {
+    if (failed > 0) {
+      console.log('[HARNESS] fail');
+    } else {
+      console.log('[HARNESS] done');
+    }
   });
 
   return {