1 files changed, 45 insertions, 0 deletions
diff --git a/layout/generic/test/file_SlowImage.sjs b/layout/generic/test/file_SlowImage.sjs
new file mode 100644
index 0000000000..a9eaeef838
--- /dev/null
+++ b/layout/generic/test/file_SlowImage.sjs
@@ -0,0 +1,45 @@
+"use strict";
+
+const IMG_BYTES = atob(
+  "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAA" +
+    "DUlEQVQImWNgY2P7DwABOgESJhRQtgAAAABJRU5ErkJggg=="
+);
+
+function handleRequest(request, response) {
+  response.processAsync();
+  getObjectState("context", function (obj) {
+    let ctx;
+    if (obj == null) {
+      ctx = {
+        QueryInterface: function (iid) {
+          if (iid.equals(Ci.nsISupports)) {
+            return this;
+          }
+          throw Components.Exception("", Cr.NS_ERROR_NO_INTERFACE);
+        },
+      };
+      ctx.wrappedJSObject = ctx;
+
+      ctx.promise = new Promise(resolve => {
+        ctx.resolve = resolve;
+      });
+
+      setObjectState("context", ctx);
+    } else {
+      ctx = obj.wrappedJSObject;
+    }
+    Promise.resolve(ctx).then(next);
+  });
+
+  function next(ctx) {
+    if (request.queryString.indexOf("continue") >= 0) {
+      ctx.resolve();
+    }
+
+    ctx.promise.then(() => {
+      response.setHeader("Content-Type", "image/png");
+      response.write(IMG_BYTES);
+      response.finish();
+    });
+  }
+}