def METHOD_NAME(manager):
    manager.test_window("one")
    manager.test_window("two")
    info = manager.c.layout.info()
    # Neither of these windows should be in the slice
    assert not info["single"]["window"]
    # Move current window to slice
    manager.c.layout.move_to_slice()
    info = manager.c.layout.info()
    assert info["single"]["window"] == "two"
    assert info["stack"]["clients"] == ["one"]
    assert_focused(manager, "two")
    # Switch focus to "one" and put it in slice
    manager.c.group.focus_back()
    assert_focused(manager, "one")
    manager.c.layout.move_to_slice()
    info = manager.c.layout.info()
    assert info["single"]["window"] == "one"
    assert info["stack"]["clients"] == ["two"]