1 files changed, 44 insertions, 0 deletions
diff --git a/browser/components/extensions/test/browser/browser_ext_tabs_printPreview.js b/browser/components/extensions/test/browser/browser_ext_tabs_printPreview.js
new file mode 100644
index 0000000000..5db423878e
--- /dev/null
+++ b/browser/components/extensions/test/browser/browser_ext_tabs_printPreview.js
@@ -0,0 +1,44 @@
+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+"use strict";
+
+add_task(async function testPrintPreview() {
+  await BrowserTestUtils.openNewForegroundTab(gBrowser, "http://example.net/");
+
+  let extension = ExtensionTestUtils.loadExtension({
+    manifest: {
+      permissions: ["tabs"],
+    },
+
+    background: async function () {
+      await browser.tabs.printPreview();
+      browser.test.assertTrue(true, "print preview entered");
+      browser.test.notifyPass("tabs.printPreview");
+    },
+  });
+
+  is(
+    document.querySelector(".printPreviewBrowser"),
+    null,
+    "There shouldn't be any print preview browser"
+  );
+
+  await extension.startup();
+
+  // Ensure we're showing the preview...
+  await BrowserTestUtils.waitForCondition(() => {
+    let preview = document.querySelector(".printPreviewBrowser");
+    return preview && BrowserTestUtils.is_visible(preview);
+  });
+
+  gBrowser.getTabDialogBox(gBrowser.selectedBrowser).abortAllDialogs();
+  // Wait for the preview to go away
+  await BrowserTestUtils.waitForCondition(
+    () => !document.querySelector(".printPreviewBrowser")
+  );
+
+  await extension.awaitFinish("tabs.printPreview");
+
+  await extension.unload();
+  BrowserTestUtils.removeTab(gBrowser.tabs[1]);
+});