1 files changed, 44 insertions, 0 deletions
diff --git a/dom/payments/test/bug1478740.html b/dom/payments/test/bug1478740.html
new file mode 100644
index 0000000000..ddcc04bbb0
--- /dev/null
+++ b/dom/payments/test/bug1478740.html
@@ -0,0 +1,44 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Payment Request Testing</title>
+<script>
+const methods = [
+  {
+    supportedMethods: "basic-card",
+  },
+];
+const details = {
+  id: "simple details",
+  total: {
+    label: "Donation",
+    amount: { currency: "USD", value: "55.00" },
+  },
+};
+const updatedDetails = {
+  id: "simple details",
+  total: {
+    label: "Donation",
+    amount: { currency: "USD", value: "55.00" },
+  },
+  error: "",
+};
+
+window.onmessage = async ({ data: action }) => {
+  let msg = "successful";
+  switch (action) {
+    case "Show Payment":
+      try {
+        let request = new PaymentRequest(methods, details);
+        let responsePromise = await request.show();
+      } catch (err) {
+        msg = err.name;
+      }
+      window.parent.postMessage(msg, "*")
+      break;
+    default:
+      window.parent.postMessage(`fail - unknown postmessage action: ${action}`, "*");
+  }
+};
+
+window.parent.postMessage("successful", "*");
+</script>