1 files changed, 156 insertions, 0 deletions
diff --git a/docshell/test/browser/browser_browsingContext-embedder.js b/docshell/test/browser/browser_browsingContext-embedder.js
new file mode 100644
index 0000000000..9473a46eb4
--- /dev/null
+++ b/docshell/test/browser/browser_browsingContext-embedder.js
@@ -0,0 +1,156 @@
+"use strict";
+
+function observeOnce(topic) {
+  return new Promise(resolve => {
+    Services.obs.addObserver(function observer(aSubject, aTopic) {
+      if (topic == aTopic) {
+        Services.obs.removeObserver(observer, topic);
+        setTimeout(() => resolve(aSubject), 0);
+      }
+    }, topic);
+  });
+}
+
+add_task(async function runTest() {
+  let fissionWindow = await BrowserTestUtils.openNewBrowserWindow({
+    fission: true,
+    remote: true,
+  });
+
+  info(`chrome, parent`);
+  let chromeBC = fissionWindow.docShell.browsingContext;
+  ok(chromeBC.currentWindowGlobal, "Should have a current WindowGlobal");
+  is(chromeBC.embedderWindowGlobal, null, "chrome has no embedder global");
+  is(chromeBC.embedderElement, null, "chrome has no embedder element");
+  is(chromeBC.parent, null, "chrome has no parent");
+
+  // Open a new tab, and check that basic frames work out.
+  let tab = await BrowserTestUtils.openNewForegroundTab({
+    gBrowser: fissionWindow.gBrowser,
+  });
+
+  info(`root, parent`);
+  let rootBC = tab.linkedBrowser.browsingContext;
+  ok(rootBC.currentWindowGlobal, "[parent] root has a window global");
+  is(
+    rootBC.embedderWindowGlobal,
+    chromeBC.currentWindowGlobal,
+    "[parent] root has chrome as embedder global"
+  );
+  is(
+    rootBC.embedderElement,
+    tab.linkedBrowser,
+    "[parent] root has browser as embedder element"
+  );
+  is(rootBC.parent, null, "[parent] root has no parent");
+
+  // Test with an in-process frame
+  let frameId = await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {
+    info(`root, child`);
+    let rootBC = content.docShell.browsingContext;
+    is(rootBC.embedderElement, null, "[child] root has no embedder");
+    is(rootBC.parent, null, "[child] root has no parent");
+
+    info(`frame, child`);
+    let iframe = content.document.createElement("iframe");
+    content.document.body.appendChild(iframe);
+
+    let frameBC = iframe.contentWindow.docShell.browsingContext;
+    is(frameBC.embedderElement, iframe, "[child] frame embedded within iframe");
+    is(frameBC.parent, rootBC, "[child] frame has root as parent");
+
+    return frameBC.id;
+  });
+
+  info(`frame, parent`);
+  let frameBC = BrowsingContext.get(frameId);
+  ok(frameBC.currentWindowGlobal, "[parent] frame has a window global");
+  is(
+    frameBC.embedderWindowGlobal,
+    rootBC.currentWindowGlobal,
+    "[parent] frame has root as embedder global"
+  );
+  is(frameBC.embedderElement, null, "[parent] frame has no embedder element");
+  is(frameBC.parent, rootBC, "[parent] frame has root as parent");
+
+  // Test with an out-of-process iframe.
+
+  let oopID = await SpecialPowers.spawn(tab.linkedBrowser, [], async () => {
+    info(`creating oop iframe`);
+    let oop = content.document.createElement("iframe");
+    oop.setAttribute("src", "https://example.com");
+    content.document.body.appendChild(oop);
+
+    await new Promise(resolve => {
+      oop.addEventListener("load", resolve, { once: true });
+    });
+
+    info(`oop frame, child`);
+    let oopBC = oop.frameLoader.browsingContext;
+    is(oopBC.embedderElement, oop, "[child] oop frame embedded within iframe");
+    is(
+      oopBC.parent,
+      content.docShell.browsingContext,
+      "[child] frame has root as parent"
+    );
+
+    return oopBC.id;
+  });
+
+  info(`oop frame, parent`);
+  let oopBC = BrowsingContext.get(oopID);
+  is(
+    oopBC.embedderWindowGlobal,
+    rootBC.currentWindowGlobal,
+    "[parent] oop frame has root as embedder global"
+  );
+  is(oopBC.embedderElement, null, "[parent] oop frame has no embedder element");
+  is(oopBC.parent, rootBC, "[parent] oop frame has root as parent");
+
+  info(`waiting for oop window global`);
+  ok(oopBC.currentWindowGlobal, "[parent] oop frame has a window global");
+
+  // Open a new window, and adopt |tab| into it.
+
+  let newWindow = await BrowserTestUtils.openNewBrowserWindow({
+    fission: true,
+    remote: true,
+  });
+
+  info(`new chrome, parent`);
+  let newChromeBC = newWindow.docShell.browsingContext;
+  ok(newChromeBC.currentWindowGlobal, "Should have a current WindowGlobal");
+  is(
+    newChromeBC.embedderWindowGlobal,
+    null,
+    "new chrome has no embedder global"
+  );
+  is(newChromeBC.embedderElement, null, "new chrome has no embedder element");
+  is(newChromeBC.parent, null, "new chrome has no parent");
+
+  isnot(newChromeBC, chromeBC, "different chrome browsing context");
+
+  info(`adopting tab`);
+  let newTab = newWindow.gBrowser.adoptTab(tab);
+
+  is(
+    newTab.linkedBrowser.browsingContext,
+    rootBC,
+    "[parent] root browsing context survived"
+  );
+  is(
+    rootBC.embedderWindowGlobal,
+    newChromeBC.currentWindowGlobal,
+    "[parent] embedder window global updated"
+  );
+  is(
+    rootBC.embedderElement,
+    newTab.linkedBrowser,
+    "[parent] embedder element updated"
+  );
+  is(rootBC.parent, null, "[parent] root has no parent");
+
+  info(`closing window`);
+  await BrowserTestUtils.closeWindow(newWindow);
+  await BrowserTestUtils.closeWindow(fissionWindow);
+});