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-rw-r--r--dom/tests/mochitest/general/postback.html16
1 files changed, 16 insertions, 0 deletions
diff --git a/dom/tests/mochitest/general/postback.html b/dom/tests/mochitest/general/postback.html
new file mode 100644
index 0000000000..c45cf5ad34
--- /dev/null
+++ b/dom/tests/mochitest/general/postback.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<head>
+ <meta charset="utf-8">
+ <meta name="viewport" content="width=device-width, initial-scale=1">
+ <title></title>
+</head>
+<body>
+<script type="text/javascript">
+ window.addEventListener("load", () => {
+ window.parent.postMessage("loaded", "*");
+ });
+</script>
+
+</body>
+</html>