1 files changed, 178 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..81a32985a0
--- /dev/null
+++ b/docshell/test/browser/browser_browsingContext-01.js
@@ -0,0 +1,178 @@
+/* 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();
+      });
+    }
+  );
+});