1 files changed, 180 insertions, 0 deletions
diff --git a/docshell/test/browser/browser_browsingContext-01.js b/docshell/test/browser/browser_browsingContext-01.js
new file mode 100644
index 0000000000..95831d2567
--- /dev/null
+++ b/docshell/test/browser/browser_browsingContext-01.js
@@ -0,0 +1,180 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const URL = "about:blank";
+
+async function getBrowsingContextId(browser, id) {
+  return SpecialPowers.spawn(browser, [id], async function (id) {
+    let contextId = content.window.docShell.browsingContext.id;
+
+    let frames = [content.window];
+    while (frames.length) {
+      let frame = frames.pop();
+      let target = frame.document.getElementById(id);
+      if (target) {
+        contextId = target.docShell.browsingContext.id;
+        break;
+      }
+
+      frames = frames.concat(Array.from(frame.frames));
+    }
+
+    return contextId;
+  });
+}
+
+async function addFrame(browser, id, parentId) {
+  return SpecialPowers.spawn(
+    browser,
+    [{ parentId, id }],
+    async function ({ parentId, id }) {
+      let parent = null;
+      if (parentId) {
+        let frames = [content.window];
+        while (frames.length) {
+          let frame = frames.pop();
+          let target = frame.document.getElementById(parentId);
+          if (target) {
+            parent = target.contentWindow.document.body;
+            break;
+          }
+          frames = frames.concat(Array.from(frame.frames));
+        }
+      } else {
+        parent = content.document.body;
+      }
+
+      let frame = await new Promise(resolve => {
+        let frame = content.document.createElement("iframe");
+        frame.id = id || "";
+        frame.url = "about:blank";
+        frame.onload = () => resolve(frame);
+        parent.appendChild(frame);
+      });
+
+      return frame.contentWindow.docShell.browsingContext.id;
+    }
+  );
+}
+
+async function removeFrame(browser, id) {
+  return SpecialPowers.spawn(browser, [id], async function (id) {
+    let frames = [content.window];
+    while (frames.length) {
+      let frame = frames.pop();
+      let target = frame.document.getElementById(id);
+      if (target) {
+        target.remove();
+        break;
+      }
+
+      frames = frames.concat(Array.from(frame.frames));
+    }
+  });
+}
+
+function getBrowsingContextById(id) {
+  return BrowsingContext.get(id);
+}
+
+add_task(async function () {
+  await BrowserTestUtils.withNewTab(
+    { gBrowser, url: URL },
+    async function (browser) {
+      let topId = await getBrowsingContextId(browser, "");
+      let topContext = getBrowsingContextById(topId);
+      isnot(topContext, null);
+      is(topContext.parent, null);
+      is(
+        topId,
+        browser.browsingContext.id,
+        "<browser> has the correct browsingContext"
+      );
+      is(
+        browser.browserId,
+        topContext.browserId,
+        "browsing context should have a correct <browser> id"
+      );
+
+      let id0 = await addFrame(browser, "frame0");
+      let browsingContext0 = getBrowsingContextById(id0);
+      isnot(browsingContext0, null);
+      is(browsingContext0.parent, topContext);
+
+      await removeFrame(browser, "frame0");
+
+      is(topContext.children.indexOf(browsingContext0), -1);
+
+      // TODO(farre): Handle browsingContext removal [see Bug 1486719].
+      todo_isnot(browsingContext0.parent, topContext);
+    }
+  );
+});
+
+add_task(async function () {
+  // If Fission is disabled, the pref is no-op.
+  await SpecialPowers.pushPrefEnv({ set: [["fission.bfcacheInParent", true]] });
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url:
+        getRootDirectory(gTestPath).replace(
+          "chrome://mochitests/content",
+          // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+          "http://example.com"
+        ) + "dummy_page.html",
+    },
+    async function (browser) {
+      let path = getRootDirectory(gTestPath).replace(
+        "chrome://mochitests/content",
+        // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+        "http://example.com"
+      );
+      await SpecialPowers.spawn(browser, [path], async function (path) {
+        var bc = new content.BroadcastChannel("browser_browsingContext");
+        function waitForMessage(command) {
+          let p = new Promise(resolve => {
+            bc.addEventListener("message", e => resolve(e), { once: true });
+          });
+          command();
+          return p;
+        }
+
+        // Open a new window and wait for the message.
+        let e1 = await waitForMessage(_ =>
+          content.window.open(path + "onpageshow_message.html", "", "noopener")
+        );
+
+        is(e1.data, "pageshow", "Got page show");
+
+        let e2 = await waitForMessage(_ => bc.postMessage("createiframe"));
+        is(e2.data.framesLength, 1, "Here we should have an iframe");
+
+        let e3 = await waitForMessage(_ => bc.postMessage("nextpage"));
+
+        is(e3.data.event, "load");
+        is(e3.data.framesLength, 0, "Here there shouldn't be an iframe");
+
+        // Return to the previous document. N.B. we expect to trigger
+        // BFCache here, hence we wait for pageshow.
+        let e4 = await waitForMessage(_ => bc.postMessage("back"));
+
+        is(e4.data, "pageshow");
+
+        let e5 = await waitForMessage(_ => bc.postMessage("queryframes"));
+        is(e5.data.framesLength, 1, "And again there should be an iframe");
+
+        is(e5.outerWindowId, e2.outerWindowId, "BF cache cached outer window");
+        is(e5.browsingContextId, e2.browsingContextId, "BF cache cached BC");
+
+        let e6 = await waitForMessage(_ => bc.postMessage("close"));
+        is(e6.data, "closed");
+
+        bc.close();
+      });
+    }
+  );
+});