1 files changed, 21 insertions, 0 deletions
diff --git a/testing/web-platform/tests/eventsource/format-field-id.any.js b/testing/web-platform/tests/eventsource/format-field-id.any.js
new file mode 100644
index 0000000000..26f1aea709
--- /dev/null
+++ b/testing/web-platform/tests/eventsource/format-field-id.any.js
@@ -0,0 +1,21 @@
+// META: title=EventSource: Last-Event-ID
+      var test = async_test()
+      test.step(function() {
+        var source = new EventSource("resources/last-event-id.py"),
+            seenhello = false
+        source.onmessage = function(e) {
+          test.step(function() {
+            if(e.data == "hello" && !seenhello) {
+              seenhello = true
+              assert_equals(e.lastEventId, "…")
+            } else if(seenhello) {
+              assert_equals("…", e.data)
+              assert_equals("…", e.lastEventId)
+              source.close()
+              test.done()
+            } else
+              assert_unreached()
+          })
+        }
+      })
+