pass

1     immutable b0 = Board([Point.empty, Point.empty, Point.empty, Point.empty,
2                           Point.empty, Point.black, Point.white, Point.empty,
3                           Point.empty, Point.empty, Point.black, Point.empty,
4                           Point.empty, Point.empty, Point.empty, Point.empty].sliced(4, 4));
5     assert(!b0.put(true, 0, 4).valid); // out-of-bounds
6     assert(!b0.put(true, 1, 1).valid); // non empty
7     assert(!b0.put(true, 0, 0).valid); // begin
8     assert(!b0.put(true, 3, 3).valid); // end
9     assert(!b0.put(true, 0, 1).valid); // no reverse neighbor
10 
11     immutable b1 = b0.put(true, 1, 3);
12     assert(b1 == [Point.empty, Point.empty, Point.empty, Point.empty,
13                   Point.empty, Point.black, Point.black, Point.black,
14                   Point.empty, Point.empty, Point.black, Point.empty,
15                   Point.empty, Point.empty, Point.empty, Point.empty].sliced(4, 4));
16     assert(b1.valid);
17     assert(b1.pass(true));
18     assert(b1.pass(false));
19 
20     immutable b5x5 = Board([Point.white, Point.empty, Point.white, Point.white, Point.white,
21                             Point.empty, Point.black, Point.black, Point.black, Point.empty,
22                             Point.black, Point.black, Point.empty, Point.black, Point.white,
23                             Point.empty, Point.black, Point.black, Point.black, Point.empty,
24                             Point.white, Point.empty, Point.white, Point.white, Point.white].sliced(5, 5));
25     auto b5x5_ = b5x5.put(false, 2, 2);
26     assert(b5x5_.toString ==
27 `     0  1  2  3  4
28   0[o][ ][o][o][o]  0
29   1[ ][o][o][o][ ]  1
30   2[x][x][o][o][o]  2
31   3[ ][o][o][o][ ]  3
32   4[o][ ][o][o][o]  4
33      0  1  2  3  4
34 `);
35     assert(b5x5_.count == [Point.empty: 6, Point.white: 17, Point.black: 2]);
36     assert(!b5x5_.pass(true));
37     assert(!b5x5_.pass(false));
38 
39     immutable b2 = Board([Point.empty, Point.empty, Point.empty, Point.empty,
40                           Point.empty, Point.black, Point.black, Point.black,
41                           Point.empty, Point.empty, Point.black, Point.empty,
42                           Point.empty, Point.empty, Point.white, Point.empty].sliced(4, 4));
43     assert(b2.pass(true));
44     assert(!b2.pass(false));
45 
46     /*
47          0  1  2  3        
48       0[x][ ][ ][ ]  0     
49       1[x][o][o][ ]  1     
50       2[x][o][o][ ]  2     
51       3[o][o][o][ ]  3     
52          0  1  2  3
53       >>> 3 0
54       >>> 3 2
55       >>> 1 0
56      */
57     immutable b3 = Board([Point.black, Point.empty, Point.empty, Point.empty,
58                           Point.black, Point.white, Point.white, Point.empty,
59                           Point.black, Point.white, Point.white, Point.empty,
60                           Point.white, Point.white, Point.white, Point.empty].sliced(4, 4));
61     assert(!b3.pass(true));
62     assert(b3.pass(false));
63 
64     /*
65      0  1  2  3  4  5  6  7
66   0[ ][ ][ ][ ][ ][ ][ ][ ]  0
67   1[ ][ ][ ][ ][ ][ ][ ][ ]  1
68   2[ ][ ][ ][ ][ ][ ][ ][ ]  2
69   3[ ][ ][o][o][o][o][o][ ]  3
70   4[x][x][x][x][o][ ][ ][ ]  4
71   5[x][x][x][x][x][o][x][x]  5
72   6[x][x][x][x][x][x][o][ ]  6
73   7[x][x][x][x][x][x][x][x]  7
74      0  1  2  3  4  5  6  7
75      */
76     enum _ = Point.empty;
77     enum x = Point.black;
78     enum o = Point.white;
79     immutable b4 = Board([_, _, _, _, _, _, _, _,
80                           _, _, _, _, _, _, _, _,
81                           _, _, _, _, _, _, _, _,
82                           _, _, o, o, o, o, o, _,
83                           x, x, x, x, o, _, _, _,
84                           x, x, x, x, x, o, x, x,
85                           x, x, x, x, x, x, o, _,
86                           x, x, x, x, x, x, x, x].sliced(8, 8));
87     assert(!b4.put(false, 0, 0).valid);