def test_is_alias(self):
# Signature: name(cls, alias_string)
# Returns True if the string could be an alias
for expr_str, (exp_lhs, exp_rhs) in Aliases:
self.assertTrue(StrToExpr.is_alias(expr_str))
for expr_str, (exp_dep, exp_indep, exp_rhs) in TimeDerivatives:
self.assertFalse(StrToExpr.is_alias(expr_str))
for expr_str, (exp_lhs, exp_rhs) in Assignments:
self.assertFalse(StrToExpr.is_alias(expr_str))
def test_state_assignment(self):
# Signature: name(cls, state_assignment_string)
# No Docstring
# from nineml.abstraction_layer.component.util import StrToExpr
for expr_str, (exp_lhs, exp_rhs) in Assignments:
ass = StrToExpr.state_assignment(expr_str)
self.assertEqual(ass.lhs, exp_lhs)
self.assertEqual(ass.rhs, exp_rhs)
def test_time_derivative(self):
# Signature: name(cls, time_derivative_string)
# Creates an TimeDerivative object from a string
# from nineml.abstraction_layer.component.util import StrToExpr
for expr_str, (exp_dep, exp_indep, exp_rhs) in TimeDerivatives:
td = StrToExpr.time_derivative(expr_str)
self.assertEquals(td.dependent_variable, exp_dep)
self.assertEquals(td.independent_variable, exp_indep)
self.assertEquals(td.rhs, exp_rhs)
def test_get_prefixed_rhs_string(self):
# Signature: name(cls, expr_obj, prefix='', exclude=None)
# No Docstring
# from nineml.abstraction_layer.component.util import MathUtil
e = StrToExpr.alias('a := b*c + d/(e*sin(f+g/e)) + b1 + e_ / exp(12*g)')
rhs_sub = MathUtil.get_prefixed_rhs_string(e, prefix='U_', exclude=['c', 'e_'])
self.assertEqual(
rhs_sub,
'U_b*c + U_d/(e*sin(U_f+U_g/e)) + U_b1 + e_ / exp(12*U_g)'
)
def test_get_rhs_substituted(self):
# Signature: name(cls, expr_obj, namemap)
# No Docstring
# from nineml.abstraction_layer.component.util import MathUtil
e = StrToExpr.alias('a := b*c + d/(e*sin(f+g/e)) + b1 + e_ / exp(12*g)')
rhs_sub = MathUtil.get_rhs_substituted(e, {'b': 'B', 'e': 'E'})
self.assertEqual(
rhs_sub,
'B*c + d/(E*sin(f+g/E)) + b1 + e_ / exp(12*g)'
)
def test_alias(self):
for expr_str, (exp_lhs, exp_rhs) in Aliases:
alias = StrToExpr.alias(expr_str)
self.assertEqual(alias.lhs, exp_lhs)
self.assertEqual(alias.rhs, exp_rhs)