tests(folders): Add tests for zen.folders.new-tabs-in-folder

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: mehdi-sy-h

src/zen/tests/folders/browser.toml

@@ -26,6 +26,8 @@ support-files = [
 
 ["browser_folder_multiselected.js"]
 
+["browser_folder_new_tabs.js"]
+
 ["browser_folder_owner_tabs.js"]
 
 ["browser_folder_reset_button.js"]

src/zen/tests/folders/browser_folder_new_tabs.js

@@ -0,0 +1,91 @@
+/* Any copyright is dedicated to the Public Domain.
+   https://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function test_New_Tab_Inside_Folder() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["zen.folders.new-tabs-in-folder", true]],
+  });
+  const selectedTab = gBrowser.selectedTab;
+  const tab = BrowserTestUtils.addTab(gBrowser, "about:blank");
+  const folder = await gZenFolders.createFolder([tab], {
+    renameFolder: false,
+  });
+  gBrowser.selectedTab = tab;
+  const triggeringPrincipal = Services.scriptSecurityManager.getSystemPrincipal();
+
+  const newTab = gBrowser.addTab("https://example.com", {
+    inBackground: true,
+    triggeringPrincipal,
+  });
+
+  /* eslint-disable mozilla/no-arbitrary-setTimeout */
+  await new Promise((resolve) => setTimeout(resolve, 100));
+
+  Assert.equal(folder.tabs.length, 3, "New tab was added to the folder");
+  Assert.equal(newTab.group, folder, "New tab is in the folder group");
+
+  gBrowser.selectedTab = selectedTab;
+  await removeFolder(folder);
+  await SpecialPowers.popPrefEnv();
+});
+
+add_task(async function test_New_Tab_Not_Inside_Folder_When_Pref_Disabled() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["zen.folders.new-tabs-in-folder", false]],
+  });
+  const selectedTab = gBrowser.selectedTab;
+  const tab = BrowserTestUtils.addTab(gBrowser, "about:blank");
+  const folder = await gZenFolders.createFolder([tab], {
+    renameFolder: false,
+  });
+  gBrowser.selectedTab = tab;
+  const triggeringPrincipal = Services.scriptSecurityManager.getSystemPrincipal();
+
+  const newTab = gBrowser.addTab("https://example.com", {
+    inBackground: true,
+    triggeringPrincipal,
+  });
+
+  await new Promise((resolve) => setTimeout(resolve, 100));
+
+  Assert.equal(folder.tabs.length, 2, "New tab was not added to the folder");
+  ok(!newTab.group, "New tab should not be in any group");
+
+  gBrowser.selectedTab = selectedTab;
+  BrowserTestUtils.removeTab(newTab);
+  await removeFolder(folder);
+  await SpecialPowers.popPrefEnv();
+});
+
+add_task(async function test_Owned_Tab_Not_Captured_By_New_Tabs_In_Folder() {
+  await SpecialPowers.pushPrefEnv({
+    set: [
+      ["zen.folders.new-tabs-in-folder", true],
+      ["zen.folders.owned-tabs-in-folder", false],
+    ],
+  });
+  const selectedTab = gBrowser.selectedTab;
+  const tab = BrowserTestUtils.addTab(gBrowser, "about:blank");
+  const folder = await gZenFolders.createFolder([tab], {
+    renameFolder: false,
+  });
+  gBrowser.selectedTab = tab;
+
+  const newTab = gBrowser.addTab("https://example.com", {
+    relatedToCurrent: true,
+    ownerTab: tab,
+    triggeringPrincipal,
+  });
+
+  await new Promise((resolve) => setTimeout(resolve, 100));
+
+  Assert.equal(folder.tabs.length, 2, "Owned tab was not captured by new-tabs-in-folder");
+  ok(!newTab.group, "Owned tab should not be in any group");
+
+  gBrowser.selectedTab = selectedTab;
+  BrowserTestUtils.removeTab(newTab);
+  await removeFolder(folder);
+  await SpecialPowers.popPrefEnv();
+});