### Question:
GridCreator implements Iterable<GridCell> { @Deprecated public String getCellIdentifier(GeoCoordinate coordinate) { if (coordinate == null) { return StringUtils.EMPTY; } return getCell(coordinate).getIdentifier(); } GridCreator(double gridSize); @Deprecated String getCellIdentifier(GeoCoordinate coordinate); GridCell getCell(GeoCoordinate coordinate); List<GridCell> getCells(GridCell cell); @Deprecated GeoCoordinate getCoordinate(String cellIdentifier); GridCell getCell(String cellIdentifier); GridCell getCell(int xId, int yId); int getNumCells(); int getNumCellsY(); int getNumCellsX(); double getGridSize(); @Override Iterator<GridCell> iterator(); @Override String toString(); static void main(String[] args);  }### Answer:
@SuppressWarnings("deprecation") @Test public void testGetCellIdentifier() { GridCreator gridCreator = new GridCreator(90); assertEquals(8, gridCreator.getNumCells()); assertEquals("(3|0)", gridCreator.getCellIdentifier(c1)); assertEquals("(3|1)", gridCreator.getCellIdentifier(c2)); assertEquals("(1|1)", gridCreator.getCellIdentifier(c3)); assertEquals("(1|0)", gridCreator.getCellIdentifier(c4)); assertEquals("(0|1)", gridCreator.getCellIdentifier(c5)); assertEquals("(3|1)", gridCreator.getCellIdentifier(c6)); assertEquals("(0|0)", gridCreator.getCellIdentifier(c7)); }