samples/poppopwin: upgrade to first-class sample

samples/third_party/pop-pop-win/test/ppw/test_field.dart

-part of ppw_test;
-
-class TestField {
-  // This grid
-  // XXXXX2
-  // X7X8X3
-  // X5XXX2
-  // X32321
-  // 110000
-
-  static const sample = const
-      [null, null, null, null, null, 2,
-       null,    7, null,    8, null, 3,
-       null,    5, null, null, null, 2,
-       null,    3,    2,    3,    2, 1,
-          1,    1,    0,    0,    0, 0];
-
-
-  static Field getSampleField() {
-    final bools = new List<bool>.from(sample.map((x) => x == null));
-
-    return new Field.fromSquares(6, 5, bools);
-  }
-
-  static void run() {
-    group('Field', () {
-      test('defaults', _testDefaults);
-      test('bombCount', _testBombCount);
-      test('fromSquares', _testFromSquares);
-      test('adjacent', _testAdjacent);
-    });
-  }
-
-  static void _testDefaults() {
-    final f = new Field();
-
-    expect(f.bombCount, equals(40));
-    expect(f.height, equals(16));
-    expect(f.width, equals(16));
-  }
-
-  static void _testBombCount() {
-    final f = new Field();
-
-    int bombCount = 0;
-    for(int x = 0; x < 16; x++) {
-      for(int y = 0; y < 16; y++) {
-        if(f.get(x, y)) {
-          bombCount++;
-        }
-      }
-    }
-    expect(bombCount, equals(f.bombCount));
-  }
-
-  static void _testFromSquares() {
-    final f = new Field.fromSquares(2, 2, [true, true, true, false]);
-    expect(f.height, equals(2));
-    expect(f.width, equals(2));
-    expect(f.bombCount, equals(3));
-  }
-
-  static void _testAdjacent() {
-    final f = getSampleField();
-
-    expect(f.bombCount, equals(13));
-
-    for(int x = 0; x < f.width; x++) {
-      for(int y = 0; y < f.height; y++) {
-        final i = x + y * f.width;
-        final adj = f.getAdjacentCount(x, y);
-        expect(adj, equals(sample[i]));
-      }
-    }
-  }
-}