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import unittest
from polymatrix.expressionstate.init.initexpressionstate import init_expression_state
import polymatrix.expression.initexpressionbase
class TestTruncate(unittest.TestCase):
def test_1(self):
terms = {
(0, 0): {
((0, 1),): 1.0, # x1 x1
},
(1, 0): {
((0, 2), (1, 1)): 1.0, # x1 x1 x2
((0, 3), (1, 1)): 1.0, # x1 x1 x1 x2
},
(0, 1): {
((0, 2), (2, 1),): 1.0, # x1 x1
((3, 1),): 1.0,
},
}
variable_terms = {
(0, 0): {((0, 1),): 1},
(1, 0): {((1, 1),): 1},
}
expr = polymatrix.expression.initexpressionbase.init_truncate_expr(
underlying=polymatrix.expression.initexpressionbase.init_from_terms_expr(terms=terms, shape=(2, 2)),
variables=polymatrix.expression.initexpressionbase.init_from_terms_expr(terms=variable_terms, shape=(2, 1),),
degrees=(1, 2),
)
state = init_expression_state(n_param=2)
state, val = expr.apply(state)
data = val.get_poly(0, 0)
self.assertDictEqual({
((0, 1),): 1.0,
}, data)
data = val.get_poly(1, 0)
self.assertDictEqual(
{}, data
)
data = val.get_poly(0, 1)
self.assertDictEqual({
((0, 2), (2, 1)): 1.0, # x1 x1
}, data)
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