1 files changed, 19 insertions, 0 deletions
diff --git a/testing/web-platform/tests/server-timing/sw.js b/testing/web-platform/tests/server-timing/sw.js
new file mode 100644
index 0000000000..a6fd72ad17
--- /dev/null
+++ b/testing/web-platform/tests/server-timing/sw.js
@@ -0,0 +1,19 @@
+importScripts('/resources/testharness.js')
+
+promise_test((test) => {
+  return fetch('./sw.js').then((response) => {
+    return new Promise((resolve, reject) => {
+      step_timeout(() => {
+        const entry = performance.getEntriesByName(response.url)[0]
+        if (!entry) {
+          reject('no entry: ' + response.url)
+        }
+
+        assert_not_equals(typeof entry.serverTiming,
+          'undefined',
+          'An instance of `PerformanceResourceTiming` should have a `serverTiming` attribute in the Service Worker context.')
+        resolve()
+      }, 250)
+    })
+  })
+})