1 files changed, 51 insertions, 0 deletions
diff --git a/browser/base/content/test/tabs/browser_multiselect_tabs_copy_through_drag_and_drop.js b/browser/base/content/test/tabs/browser_multiselect_tabs_copy_through_drag_and_drop.js
new file mode 100644
index 0000000000..029708560a
--- /dev/null
+++ b/browser/base/content/test/tabs/browser_multiselect_tabs_copy_through_drag_and_drop.js
@@ -0,0 +1,51 @@
+add_task(async function test() {
+  let tab0 = gBrowser.selectedTab;
+  // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+  let tab1 = await addTab("http://example.com/1");
+  // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+  let tab2 = await addTab("http://example.com/2");
+  // eslint-disable-next-line @microsoft/sdl/no-insecure-url
+  let tab3 = await addTab("http://example.com/3");
+  let tabs = [tab0, tab1, tab2, tab3];
+
+  await BrowserTestUtils.switchTab(gBrowser, tab1);
+  await triggerClickOn(tab2, { ctrlKey: true });
+
+  is(gBrowser.selectedTab, tab1, "Tab1 is active");
+  is(gBrowser.selectedTabs.length, 2, "Two selected tabs");
+  is(gBrowser.visibleTabs.length, 4, "Four tabs in window before copy");
+
+  for (let i of [1, 2]) {
+    ok(tabs[i].multiselected, "Tab" + i + " is multiselected");
+  }
+  for (let i of [0, 3]) {
+    ok(!tabs[i].multiselected, "Tab" + i + " is not multiselected");
+  }
+
+  await dragAndDrop(tab1, tab3, true);
+
+  is(gBrowser.selectedTab, tab1, "tab1 is still active");
+  is(gBrowser.selectedTabs.length, 2, "Two selected tabs");
+  is(gBrowser.visibleTabs.length, 6, "Six tabs in window after copy");
+
+  let tab4 = gBrowser.visibleTabs[4];
+  let tab5 = gBrowser.visibleTabs[5];
+  tabs.push(tab4);
+  tabs.push(tab5);
+
+  for (let i of [1, 2]) {
+    ok(tabs[i].multiselected, "Tab" + i + " is multiselected");
+  }
+  for (let i of [0, 3, 4, 5]) {
+    ok(!tabs[i].multiselected, "Tab" + i + " is not multiselected");
+  }
+
+  await BrowserTestUtils.waitForCondition(() => getUrl(tab4) == getUrl(tab1));
+  await BrowserTestUtils.waitForCondition(() => getUrl(tab5) == getUrl(tab2));
+
+  ok(true, "Tab1 and tab2 are duplicated succesfully");
+
+  for (let tab of tabs.filter(t => t != tab0)) {
+    BrowserTestUtils.removeTab(tab);
+  }
+});