def test_vec_select_sum_of_zero_vectors(self):
# veclist = [, Vec({'a', 'b', 'c', 'd'}, {'a': 3, 'c': 1}), Vec({'a', 'b', 'c', 'd'}, {'c': 5})]
__domain = {'a', 'b', 'c', 'd'}
v1 = Vec(__domain, {'a': 2, 'b': 3, 'c': 1})
v2 = Vec(__domain, {'a': 3, 'c': 1})
v3 = Vec(__domain, { 'c': 5})
veclist = [v1, v2, v3]
selected1 = vec_select(veclist, 'c')
selected2 = vec_select(veclist, 'b')
selected3 = vec_select(veclist, 'd')
self.assertTrue(vec_sum(selected1, __domain) == Vec(__domain, {}))
self.assertTrue(vec_sum(selected2, __domain) == Vec(__domain, {'a':3, 'c':6}))
self.assertTrue(vec_sum(selected1, __domain) == Vec(__domain, {'a':5,'b':3,'c':7}))
def test_vecselect_is_valid(self):
D = {'a','b','c'}
v1 = Vec(D, {'a': 1})
v2 = Vec(D, {'a': 0, 'b': 1})
v3 = Vec(D, { 'b': 2})
v4 = Vec(D, {'a': 10, 'b': 10})
__got = vec_select([v1, v2, v3, v4], 'a')
__expected = [Vec(D,{'b': 1}), Vec(D,{'b': 2})]
self.assertTrue( __got == __expected, __got)
