@Test public void testFindBoundariesExpandingFromSquare() throws FileNotFoundException, IOException {
TextGrid grid;
grid = new TextGrid();
grid.loadFrom("tests/text/simple_square01.txt");
CellSet wholeGridSet = new CellSet();
addSquareToCellSet(grid, wholeGridSet, 0,0, grid.getWidth(),grid.getHeight());
TextGrid copyGrid = new AbstractionGrid(grid, wholeGridSet).getCopyOfInternalBuffer();