def test_gen_steps_frozen(self):
camel_loc = (1<<32)
dog_loc = (1<<33)
bbds = bb.empty_bboards()
bbds['m'] = bbds['w'] = camel_loc
bbds['d'] = bbds['b'] = dog_loc
self.assertFalse(bb._free_pieces('b', bbds))
self.assertTrue(camel_loc & bb._free_pieces('w', bbds))
self.assertEquals(bb._allowed_steps('b', bbds),
dict((ch, 0) for ch in 'NSEW'))
self.assertEquals(bb._allowed_steps('w', bbds),
dict(N=camel_loc, S=camel_loc, E=0, W=0))
def test_gen_steps_rabbits(self):
from random import randrange
for color, dir in ('wS', 'bN'):
bbds = bb.empty_bboards()
for _ in range(10):
rabbit_loc = (1<<randrange(64))
bbds['r'] |= rabbit_loc
bbds[color] |= rabbit_loc
r_steps = bb._allowed_steps(color, bbds)
self.assertFalse(r_steps[dir])
def test_gen_simple_steps_middle(self):
for j in range(1, 7):
for i in range(1, 7):
loc = (1<<((8*j)+i))
dirs = 'NSEW'
bbds = bb.empty_bboards()
bbds['e'] = bbds['b'] = loc
self.assertTrue(loc & bb._free_pieces('b', bbds))
dir_to_psns = dict((ch, loc) for ch in dirs)
self.assertEquals(dir_to_psns, bb._allowed_steps('b', bbds))
def test_gen_simple_steps_corner(self):
# all the corner positions.
locs = (1<<56, 1<<63, 1<<7, 1)
# the free directions from each corner.
dirs = ('SE', 'SW', 'NW', 'NE')
for loc, dd in zip(locs, dirs):
bbds = bb.empty_bboards()
bbds['e'] = bbds['b'] = loc
self.assertTrue(loc & bb._free_pieces('b', bbds))
dir_to_psns = dict((ch, 0) for ch in 'NSEW')
for d in dd:
dir_to_psns[d] = loc
self.assertEquals(dir_to_psns, bb._allowed_steps('b', bbds))