public void QueryTree_Update()
{
var customType = typeof(int);
var customType2 = typeof(int);
var monadMember = (MonadMember) new MonadAbstraction(customType, inner: null);
var lambdaAbstraction = new LambdaAbstraction(body: null, parameters: null);
var updatedCustomType = typeof(int);
var updatedMonadMember = (MonadMember) new MonadAbstraction(updatedCustomType, inner: null);
var updatedLambdaAbstraction = new LambdaAbstraction(body: null, parameters: null);
{
var op = new FirstOperator(customType, monadMember);
var unchanged = op.Update(monadMember);
Assert.AreSame(op, unchanged);
var op2 = op.Update(updatedMonadMember);
Assert.AreNotSame(op, op2);
Assert.AreSame(updatedMonadMember, op2.Source);
}
{
var op = new FirstPredicateOperator(customType, monadMember, lambdaAbstraction);
var unchanged = op.Update(monadMember, lambdaAbstraction);
Assert.AreSame(op, unchanged);
var op2 = op.Update(updatedMonadMember, lambdaAbstraction);
Assert.AreNotSame(op, op2);
Assert.AreSame(updatedMonadMember, op2.Source);
Assert.AreSame(lambdaAbstraction, op2.Predicate);
var op3 = op.Update(monadMember, updatedLambdaAbstraction);
Assert.AreNotSame(op, op3);
Assert.AreSame(monadMember, op3.Source);
Assert.AreSame(updatedLambdaAbstraction, op3.Predicate);
}
{
var op = new SelectOperator(customType, customType2, monadMember, lambdaAbstraction);
var unchanged = op.Update(monadMember, lambdaAbstraction);
Assert.AreSame(op, unchanged);
var op2 = op.Update(updatedMonadMember, lambdaAbstraction);
Assert.AreNotSame(op, op2);
Assert.AreSame(updatedMonadMember, op2.Source);
Assert.AreSame(lambdaAbstraction, op2.Selector);
var op3 = op.Update(monadMember, updatedLambdaAbstraction);
Assert.AreNotSame(op, op3);
Assert.AreSame(monadMember, op3.Source);
Assert.AreSame(updatedLambdaAbstraction, op3.Selector);
}
{
var op = new TakeOperator(customType, monadMember, lambdaAbstraction);
var unchanged = op.Update(monadMember, lambdaAbstraction);
Assert.AreSame(op, unchanged);
var op2 = op.Update(updatedMonadMember, lambdaAbstraction);
Assert.AreNotSame(op, op2);
Assert.AreSame(updatedMonadMember, op2.Source);
Assert.AreSame(lambdaAbstraction, op2.Count);
var op3 = op.Update(monadMember, updatedLambdaAbstraction);
Assert.AreNotSame(op, op3);
Assert.AreSame(monadMember, op3.Source);
Assert.AreSame(updatedLambdaAbstraction, op3.Count);
}
{
var op = new WhereOperator(customType, monadMember, lambdaAbstraction);
var unchanged = op.Update(monadMember, lambdaAbstraction);
Assert.AreSame(op, unchanged);
var op2 = op.Update(updatedMonadMember, lambdaAbstraction);
Assert.AreNotSame(op, op2);
Assert.AreSame(updatedMonadMember, op2.Source);
Assert.AreSame(lambdaAbstraction, op2.Predicate);
var op3 = op.Update(monadMember, updatedLambdaAbstraction);
Assert.AreNotSame(op, op3);
Assert.AreSame(monadMember, op3.Source);
Assert.AreSame(updatedLambdaAbstraction, op3.Predicate);
}
{
var ma = new MonadAbstraction(customType, lambdaAbstraction);
var unchanged = ma.Update(lambdaAbstraction);
Assert.AreSame(ma, unchanged);
var ma2 = ma.Update(updatedLambdaAbstraction);
Assert.AreNotSame(ma, ma2);
Assert.AreSame(updatedLambdaAbstraction, ma2.Inner);
}
{
var lambda = Expression.Lambda(Expression.Empty(), Expression.Parameter(typeof(int)));
var parameters = new QueryTree[] { monadMember }.ToReadOnly();
var updatedLambda = Expression.Lambda(Expression.Empty(), Expression.Parameter(typeof(int)));
var updatedParameters = new QueryTree[] { monadMember }.ToReadOnly();
var la = new LambdaAbstraction(lambda, parameters);
var unchanged = la.Update(lambda, parameters);
Assert.AreSame(la, unchanged);
var la2 = la.Update(updatedLambda, parameters);
Assert.AreNotSame(la, la2);
Assert.AreSame(updatedLambda, la2.Body);
CollectionAssert.AreEqual(parameters, la2.Parameters); // A ToReadOnly is called on the IE<QT>
var la3 = la.Update(lambda, updatedParameters);
Assert.AreNotSame(la, la3);
Assert.AreSame(lambda, la3.Body);
CollectionAssert.AreEqual(updatedParameters, la3.Parameters);
}
}
