test_y_of_schema1 = function()
	local state = edit.initialize_test_state()
	state.lines = load_array{'1', '2', '3'}
	Text.redraw_all(state)
	check_eq(y_of_schema1(state, {line=1, pos=1}), 0, 'start of first line')
	check_eq(y_of_schema1(state, {line=1, pos=2}), 0, 'middle of first line')
	check_eq(y_of_schema1(state, {line=2, pos=2}), state.line_height, 'middle of second line')
end