add test

Author: Xstoudi

test/test-runner/test-output-spec-reporter-watch-restart.mjs

@@ -0,0 +1,18 @@
+import '../common/index.mjs';
+import { spec as SpecReporter } from 'node:test/reporters';
+import assert from 'node:assert';
+
+const reporter = new SpecReporter();
+let output = '';
+
+reporter.on('data', (chunk) => {
+  output += chunk;
+});
+
+reporter.write({
+  type: 'test:watch:restarted',
+});
+
+reporter.end();
+
+assert.match(output, /Restarted at .+/);