function test_pagedown_never_moves_up()
io.write('\ntest_pagedown_never_moves_up')
-- draw the final screen line of a wrapping line
App.screen.init{width=Editor_state.left+30, height=60}
Editor_state = edit.initialize_test_state()
Editor_state.lines = load_array{'abc def ghi'}
Text.redraw_all(Editor_state)
Editor_state.cursor1 = {line=1, pos=9}
Editor_state.screen_top1 = {line=1, pos=9}
Editor_state.screen_bottom1 = {}
edit.draw(Editor_state)
-- pagedown makes no change
edit.run_after_keychord(Editor_state, 'pagedown')
check_eq(Editor_state.screen_top1.line, 1, 'F - test_pagedown_never_moves_up/screen_top:line')
check_eq(Editor_state.screen_top1.pos, 9, 'F - test_pagedown_never_moves_up/screen_top:pos')
end