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from gi.repository import Gtk
from gaphas.tool.scroll import on_scroll, scroll_tool
def test_scroll_tool_returns_a_controller(view):
tool = scroll_tool(view)
assert isinstance(tool, Gtk.EventController)
def test_offset_changes(view, scrolled_window):
tool = scroll_tool(view)
view.add_controller(tool)
view._scrolling.update_adjustments(100, 100, (0, 0, 100, 100))
assert view.hadjustment
assert view.vadjustment
assert view._scrolling._hadjustment_handler_id
assert view._scrolling._hadjustment_handler_id
on_scroll(tool, 10, 10, 1)
assert view.matrix[4] == -10
assert view.matrix[5] == -10
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