first webextension test

e2e/ambassador/src/content/index.js

@@ -0,0 +1,11 @@
+import { WINDOWS_CREATE, WINDOWS_REMOVE } from '../shared/messages';
+import * as ipc from './ipc';
+
+ipc.receivePageMessage((message) => {
+  switch (message.type) {
+  case WINDOWS_CREATE:
+    return ipc.send(message);
+  case WINDOWS_REMOVE:
+    return ipc.send(message);
+  }
+});

e2e/ambassador/src/content/ipc.js

@@ -0,0 +1,31 @@
+import { METHOD_REQUEST, METHOD_RESPONSE } from '../shared/messages';
+
+const send = (message) => {
+  return browser.runtime.sendMessage(message);
+};
+
+const receivePageMessage = (func) => {
+  window.addEventListener('message', (e) => {
+    let packet = e.data;
+    if (e.origin !== window.origin || packet.method !== METHOD_REQUEST) {
+      return;
+    }
+
+    let resp = {
+      id: packet.id,
+      method: METHOD_RESPONSE,
+    };
+    let respMessage = func(packet.message);
+    if (respMessage instanceof Promise) {
+      return respMessage.then((data) => {
+        resp.message = data;
+        e.source.postMessage(resp, e.origin);
+      });
+    } else if (respMessage) {
+      resp.message = respMessage;
+    }
+    e.source.postMessage(resp, e.origin);
+  });
+};
+
+export { send, receivePageMessage };