1 files changed, 93 insertions, 0 deletions
diff --git a/toolkit/components/pictureinpicture/tests/browser_backgroundTab.js b/toolkit/components/pictureinpicture/tests/browser_backgroundTab.js
new file mode 100644
index 0000000000..e1f96748a5
--- /dev/null
+++ b/toolkit/components/pictureinpicture/tests/browser_backgroundTab.js
@@ -0,0 +1,93 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+/**
+ * This test creates a PiP window, then switches to another tab and confirms
+ * that the PiP tab is still active.
+ */
+add_task(async () => {
+  let videoID = "no-controls";
+  let firstTab = gBrowser.selectedTab;
+  await BrowserTestUtils.withNewTab(
+    {
+      url: TEST_PAGE,
+      gBrowser,
+    },
+    async browser => {
+      let originatingTab = gBrowser.getTabForBrowser(browser);
+      let pipWin = await triggerPictureInPicture(browser, videoID);
+      ok(pipWin, "Got Picture-in-Picture window.");
+
+      await BrowserTestUtils.switchTab(gBrowser, firstTab);
+
+      let switcher = gBrowser._getSwitcher();
+
+      Assert.equal(
+        switcher.getTabState(originatingTab),
+        switcher.STATE_LOADED,
+        "The originating browser tab should be in STATE_LOADED."
+      );
+      Assert.equal(
+        browser.docShellIsActive,
+        true,
+        "The docshell should be active in the originating tab"
+      );
+
+      // We need to destroy the current AsyncTabSwitcher to avoid
+      // tabrowser.shouldActivateDocShell going in the
+      // AsyncTabSwitcher.shouldActivateDocShell code path which isn't PiP aware.
+      switcher.destroy();
+
+      // Closing with window.close doesn't actually pause the video, so click
+      // the close button instead.
+      pipWin.document.getElementById("close").click();
+      await BrowserTestUtils.windowClosed(pipWin);
+
+      Assert.equal(
+        browser.docShellIsActive,
+        false,
+        "The docshell should be inactive in the originating tab"
+      );
+    }
+  );
+});
+
+/**
+ * This test creates a PiP window, then minimizes the browser and confirms
+ * that the PiP tab is still active.
+ */
+add_task(async () => {
+  let videoID = "no-controls";
+  await BrowserTestUtils.withNewTab(
+    {
+      url: TEST_PAGE,
+      gBrowser,
+    },
+    async browser => {
+      let originatingTab = gBrowser.getTabForBrowser(browser);
+      let pipWin = await triggerPictureInPicture(browser, videoID);
+      ok(pipWin, "Got Picture-in-Picture window.");
+
+      let promiseSizeModeChange = BrowserTestUtils.waitForEvent(
+        window,
+        "sizemodechange"
+      );
+      window.minimize();
+      await promiseSizeModeChange;
+
+      let switcher = gBrowser._getSwitcher();
+
+      Assert.equal(
+        switcher.getTabState(originatingTab),
+        switcher.STATE_LOADED,
+        "The originating browser tab should be in STATE_LOADED."
+      );
+
+      await BrowserTestUtils.closeWindow(pipWin);
+
+      // Workaround bug 1782134.
+      window.restore();
+    }
+  );
+});