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import unittest
from polymatrix.expressionstate.init.initexpressionstate import init_expression_state
import polymatrix.expression.initexpressionbase
class TestDivergence(unittest.TestCase):
def test_1(self):
underlying_terms = {
(0, 0): {
((0, 1),): 2.0,
((1, 1),): 3.0,
},
(1, 0): {
tuple(): 5.0,
((0, 1),): 3.0,
},
(2, 0): {
((0, 1),): 2.0,
((1, 1), (2, 3)): 3.0,
},
}
variable_terms = {
(0, 0): {((0, 1),): 1},
(1, 0): {((1, 1),): 1},
(2, 0): {((2, 1),): 1},
}
expr = polymatrix.expression.initexpressionbase.init_divergence_expr(
underlying=polymatrix.expression.initexpressionbase.init_from_terms_expr(terms=underlying_terms, shape=(3, 1)),
variables=polymatrix.expression.initexpressionbase.init_from_terms_expr(terms=variable_terms, shape=(3, 1),),
)
state = init_expression_state(n_param=2)
state, val = expr.apply(state)
data = val.get_poly(0, 0)
self.assertDictEqual({
tuple(): 2.0,
((1, 1), (2, 2)): 9.0,
}, data)
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