def Evaluate(self, state):
"""Evaluates the condition using the values in *state*.
* *state* is a :py:class:`~pyslet.qtiv2.variables.TestSessionState`
instance."""
if self.Expression is None:
raise core.ProcessingError(
"preCondition or branchRule with missing condition")
value = self.Expression.Evaluate(state)
variables.CheckBaseTypes(value.baseType, variables.BaseType.boolean)
variables.CheckCardinalities(value.Cardinality(),
variables.Cardinality.single)
return value and value.value
def Run(self, state):
"""Run this test and, if True, any resulting rules.
Returns *True* if the condition evaluated to *True*."""
if self.Expression is None:
raise core.ProcessingError("templateIf with missing condition")
value = self.Expression.Evaluate(state)
variables.CheckBaseTypes(value.baseType, variables.BaseType.boolean)
variables.CheckCardinalities(value.Cardinality(),
variables.Cardinality.single)
if value and value.value:
for r in self.TemplateRule:
r.Run(state)
return True
else:
return False
