1 files changed, 161 insertions, 0 deletions
diff --git a/toolkit/components/remotebrowserutils/tests/browser/browser_oopProcessSwap.js b/toolkit/components/remotebrowserutils/tests/browser/browser_oopProcessSwap.js
new file mode 100644
index 0000000000..3286227d37
--- /dev/null
+++ b/toolkit/components/remotebrowserutils/tests/browser/browser_oopProcessSwap.js
@@ -0,0 +1,161 @@
+add_task(async function oopProcessSwap() {
+  const FILE = fileURL("dummy_page.html");
+  const WEB = httpURL("file_postmsg_parent.html");
+
+  let win = await BrowserTestUtils.openNewBrowserWindow({ fission: true });
+
+  await BrowserTestUtils.withNewTab(
+    { gBrowser: win.gBrowser, url: FILE },
+    async browser => {
+      is(browser.browsingContext.children.length, 0);
+
+      info("creating an in-process frame");
+      let frameId = await SpecialPowers.spawn(
+        browser,
+        [{ FILE }],
+        async ({ FILE }) => {
+          let iframe = content.document.createElement("iframe");
+          iframe.setAttribute("src", FILE);
+          content.document.body.appendChild(iframe);
+
+          // The nested URI should be same-process
+          ok(iframe.browsingContext.docShell, "Should be in-process");
+
+          return iframe.browsingContext.id;
+        }
+      );
+
+      is(browser.browsingContext.children.length, 1);
+
+      info("navigating to x-process frame");
+      let oopinfo = await SpecialPowers.spawn(
+        browser,
+        [{ WEB }],
+        async ({ WEB }) => {
+          let iframe = content.document.querySelector("iframe");
+
+          iframe.contentWindow.location = WEB;
+
+          let data = await new Promise(resolve => {
+            content.window.addEventListener(
+              "message",
+              function (evt) {
+                info("oop iframe loaded");
+                is(evt.source, iframe.contentWindow);
+                resolve(evt.data);
+              },
+              { once: true }
+            );
+          });
+
+          is(iframe.browsingContext.docShell, null, "Should be out-of-process");
+          is(
+            iframe.browsingContext.embedderElement,
+            iframe,
+            "correct embedder"
+          );
+
+          return {
+            location: data.location,
+            browsingContextId: iframe.browsingContext.id,
+          };
+        }
+      );
+
+      is(browser.browsingContext.children.length, 1);
+
+      if (Services.prefs.getBoolPref("fission.preserve_browsing_contexts")) {
+        is(
+          frameId,
+          oopinfo.browsingContextId,
+          `BrowsingContext should not have changed (${frameId} != ${oopinfo.browsingContextId})`
+        );
+      }
+      is(oopinfo.location, WEB, "correct location");
+    }
+  );
+
+  await BrowserTestUtils.closeWindow(win);
+});
+
+add_task(async function oopOriginProcessSwap() {
+  const COM_DUMMY = httpURL("dummy_page.html", "https://example.com/");
+  const ORG_POSTMSG = httpURL(
+    "file_postmsg_parent.html",
+    "https://example.org/"
+  );
+
+  let win = await BrowserTestUtils.openNewBrowserWindow({ fission: true });
+
+  await BrowserTestUtils.withNewTab(
+    { gBrowser: win.gBrowser, url: COM_DUMMY },
+    async browser => {
+      is(browser.browsingContext.children.length, 0);
+
+      info("creating an in-process frame");
+      let frameId = await SpecialPowers.spawn(
+        browser,
+        [{ COM_DUMMY }],
+        async ({ COM_DUMMY }) => {
+          let iframe = content.document.createElement("iframe");
+          iframe.setAttribute("src", COM_DUMMY);
+          content.document.body.appendChild(iframe);
+
+          // The nested URI should be same-process
+          ok(iframe.browsingContext.docShell, "Should be in-process");
+
+          return iframe.browsingContext.id;
+        }
+      );
+
+      is(browser.browsingContext.children.length, 1);
+
+      info("navigating to x-process frame");
+      let oopinfo = await SpecialPowers.spawn(
+        browser,
+        [{ ORG_POSTMSG }],
+        async ({ ORG_POSTMSG }) => {
+          let iframe = content.document.querySelector("iframe");
+
+          iframe.contentWindow.location = ORG_POSTMSG;
+
+          let data = await new Promise(resolve => {
+            content.window.addEventListener(
+              "message",
+              function (evt) {
+                info("oop iframe loaded");
+                is(evt.source, iframe.contentWindow);
+                resolve(evt.data);
+              },
+              { once: true }
+            );
+          });
+
+          is(iframe.browsingContext.docShell, null, "Should be out-of-process");
+          is(
+            iframe.browsingContext.embedderElement,
+            iframe,
+            "correct embedder"
+          );
+
+          return {
+            location: data.location,
+            browsingContextId: iframe.browsingContext.id,
+          };
+        }
+      );
+
+      is(browser.browsingContext.children.length, 1);
+      if (Services.prefs.getBoolPref("fission.preserve_browsing_contexts")) {
+        is(
+          frameId,
+          oopinfo.browsingContextId,
+          `BrowsingContext should not have changed (${frameId} != ${oopinfo.browsingContextId})`
+        );
+      }
+      is(oopinfo.location, ORG_POSTMSG, "correct location");
+    }
+  );
+
+  await BrowserTestUtils.closeWindow(win);
+});