public void Update_NoChanges()
{
var resultWithElse = _caseExpressionWithElse.Update(_caseExpressionWithElse.Cases, _caseExpressionWithElse.ElseCase);
var resultWithoutElse = _caseExpressionWithoutElse.Update(_caseExpressionWithoutElse.Cases, _caseExpressionWithoutElse.ElseCase);
Assert.That(resultWithElse, Is.SameAs(_caseExpressionWithElse));
Assert.That(resultWithoutElse, Is.SameAs(_caseExpressionWithoutElse));
}
public Expression VisitSqlCase(SqlCaseExpression expression)
{
ArgumentUtility.CheckNotNull("expression", expression);
var newCases = Visit(
expression.Cases,
caseWhenPair =>
{
var newWhen = ApplyPredicateContext(caseWhenPair.When);
var newThen = ApplySingleValueContext(caseWhenPair.Then);
return(caseWhenPair.Update(newWhen, newThen));
});
var newElseCase = expression.ElseCase != null?ApplySingleValueContext(expression.ElseCase) : null;
return(expression.Update(newCases, newElseCase));
}