1 files changed, 83 insertions, 0 deletions
diff --git a/browser/base/content/test/tabcrashed/browser_printpreview_crash.js b/browser/base/content/test/tabcrashed/browser_printpreview_crash.js
new file mode 100644
index 0000000000..3ceb4fbe17
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+++ b/browser/base/content/test/tabcrashed/browser_printpreview_crash.js
@@ -0,0 +1,83 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_URL =
+  // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+  "http://example.com/browser/browser/base/content/test/tabcrashed/file_contains_emptyiframe.html";
+const DOMAIN = "example.com";
+
+/**
+ * This is really a crashtest, but because we need PrintUtils this is written as a browser test.
+ * Test that when we don't crash when trying to print a document in the following scenario -
+ * A top level document has an iframe of different origin embedded (here example.com has test1.example.com iframe embedded)
+ * and they both set their document.domain to be "example.com".
+ */
+add_task(async function test() {
+  // 1. Open a new tab and wait for it to load the top level doc
+  let newTab = await BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_URL);
+  let browser = newTab.linkedBrowser;
+
+  // 2. Navigate the iframe within the doc and wait for the load to complete
+  await SpecialPowers.spawn(browser, [], async function () {
+    const iframe = content.document.querySelector("iframe");
+    const loaded = new Promise(resolve => {
+      iframe.addEventListener(
+        "load",
+        () => {
+          resolve();
+        },
+        { once: true }
+      );
+    });
+    iframe.src =
+      // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+      "http://test1.example.com/browser/browser/base/content/test/tabcrashed/file_iframe.html";
+    await loaded;
+  });
+
+  // 3. Change the top level document's domain
+  await SpecialPowers.spawn(browser, [DOMAIN], async function (domain) {
+    content.document.domain = domain;
+  });
+
+  // 4. Get the reference to the iframe and change its domain
+  const iframe = await SpecialPowers.spawn(browser, [], () => {
+    return content.document.querySelector("iframe").browsingContext;
+  });
+
+  await SpecialPowers.spawn(iframe, [DOMAIN], domain => {
+    content.document.domain = domain;
+  });
+
+  // 5. Try to print things
+  ok(
+    !document.querySelector(".printPreviewBrowser"),
+    "Should NOT be in print preview mode at the start of this test."
+  );
+
+  // Enter print preview
+  document.getElementById("cmd_print").doCommand();
+  await BrowserTestUtils.waitForCondition(() => {
+    let preview = document.querySelector(".printPreviewBrowser");
+    return preview && BrowserTestUtils.is_visible(preview);
+  });
+
+  let ppBrowser = document.querySelector(
+    ".printPreviewBrowser[previewtype=source]"
+  );
+  ok(ppBrowser, "Print preview browser was created");
+
+  ok(true, "We did not crash.");
+
+  // We haven't crashed! Exit the print preview.
+  gBrowser.getTabDialogBox(gBrowser.selectedBrowser).abortAllDialogs();
+  await BrowserTestUtils.waitForCondition(
+    () => !document.querySelector(".printPreviewBrowser")
+  );
+
+  info("We are not in print preview anymore.");
+
+  BrowserTestUtils.removeTab(newTab);
+});