1 files changed, 58 insertions, 0 deletions
diff --git a/browser/base/content/test/tabs/browser_tabSwitchPrintPreview.js b/browser/base/content/test/tabs/browser_tabSwitchPrintPreview.js
new file mode 100644
index 0000000000..8b9e47461f
--- /dev/null
+++ b/browser/base/content/test/tabs/browser_tabSwitchPrintPreview.js
@@ -0,0 +1,58 @@
+const kURL1 = "data:text/html,Should I stay or should I go?";
+const kURL2 = "data:text/html,I shouldn't be here!";
+
+/**
+ * Verify that if we open a new tab and try to make it the selected tab while
+ * print preview is up, that doesn't happen.
+ * Also check that we switch back to the original tab on exiting Print Preview.
+ */
+add_task(async function() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["print.tab_modal.enabled", false]],
+  });
+  await BrowserTestUtils.withNewTab(kURL1, async function(browser) {
+    let originalTab = gBrowser.selectedTab;
+    let tab = BrowserTestUtils.addTab(gBrowser, kURL2);
+    document.getElementById("cmd_printPreview").doCommand();
+    gBrowser.selectedTab = tab;
+    await BrowserTestUtils.waitForCondition(
+      () => gInPrintPreviewMode,
+      "should be in print preview mode"
+    );
+    isnot(
+      gBrowser.selectedTab,
+      tab,
+      "Selected tab should not be the tab we added"
+    );
+    is(
+      gBrowser.selectedTab,
+      PrintPreviewListener._printPreviewTab,
+      "Selected tab should be the print preview tab"
+    );
+    gBrowser.selectedTab = tab;
+    isnot(
+      gBrowser.selectedTab,
+      tab,
+      "Selected tab should still not be the tab we added"
+    );
+    is(
+      gBrowser.selectedTab,
+      PrintPreviewListener._printPreviewTab,
+      "Selected tab should still be the print preview tab"
+    );
+    let tabSwitched = BrowserTestUtils.switchTab(gBrowser, () => {
+      PrintUtils.exitPrintPreview();
+    });
+    await BrowserTestUtils.waitForCondition(
+      () => !gInPrintPreviewMode,
+      "should no longer be in print preview mode"
+    );
+    await tabSwitched;
+    is(
+      gBrowser.selectedTab,
+      originalTab,
+      "Selected tab should be back to the original tab that we print previewed"
+    );
+    BrowserTestUtils.removeTab(tab);
+  });
+});