samples/pop_pop_win: now based on StageXL

samples/pop_pop_win/test/game_test.dart

 library pop_pop_win.game_test;
 
 import 'dart:math';
-import 'package:bot/bot.dart';
+
 import 'package:pop_pop_win/src/game.dart';
 import 'package:unittest/unittest.dart';
 
 import 'test_util.dart';
 
 void main() {
   test('initial values', _testInitial);
   test('setFlag', _testSetFlag);
   test('cannot reveal flagged', _testCannotRevealFlagged);
   test('cannot flag revealed', _testCannotFlagRevealed);
@@ skipping 93 matching lines @@
 void _testNoopChord() {
   var f = getSampleField();
   var g = new Game(f);
 
   expect(g.bombsLeft, equals(13));
   var startReveals = f.length - 13;
   expect(g.revealsLeft, equals(startReveals));
   expect(g.state, equals(GameState.reset));
 
   var revealed = g.reveal(2, 3);
-  expect(revealed, unorderedEquals([const Coordinate(2, 3)]));
+  expect(revealed, unorderedEquals([const Point(2, 3)]));
 
   g.setFlag(2, 2, true);
 
   expect(g.bombsLeft, equals(12));
   expect(g.revealsLeft, equals(startReveals - 1));
 
   expect(() => g.reveal(2, 3), throwsException);
 }
 
 void _testGoodChord() {
@@ skipping 133 matching lines @@
       } else {
         expect(g.getSquareState(x, y), equals(SquareState.revealed));
       }
       expect(g.state, isNot(equals(GameState.reset)));
       expect(g.state, isNot(equals(GameState.lost)));
     }
   }
 
   expect(g.state, equals(GameState.won));
 }