public void EvaluateWholeQueryTree()
{
// ReSharper disable ConvertToConstant.Local
var i = 1;
// ReSharper restore ConvertToConstant.Local
var source1 = ExpressionHelper.CreateQueryable <Cook> ();
var source2 = ExpressionHelper.CreateQueryable <Cook> ();
var query = from s1 in source1
from s2 in source2
where 2 > i + 5
select s1.ID + (1 + i);
var partiallyEvaluatedExpression = PartialEvaluatingExpressionTreeVisitor.EvaluateIndependentSubtrees(query.Expression);
var selectMethodCallExpression = (MethodCallExpression)partiallyEvaluatedExpression;
var whereMethodCallExpression = (MethodCallExpression)selectMethodCallExpression.Arguments[0];
var selectManyMethodCallExpression = (MethodCallExpression)whereMethodCallExpression.Arguments[0];
var selectSelectorNavigator = new ExpressionTreeNavigator(selectMethodCallExpression.Arguments[1]);
var wherePredicateNavigator = new ExpressionTreeNavigator(whereMethodCallExpression.Arguments[1]);
var selectManyCollectionSelectorNavigator = new ExpressionTreeNavigator(selectManyMethodCallExpression.Arguments[1]);
Assert.That(selectSelectorNavigator.Operand.Body.Right.Value, Is.EqualTo(2));
Assert.That(wherePredicateNavigator.Operand.Body.Value, Is.EqualTo(false));
Assert.That(selectManyCollectionSelectorNavigator.Operand.Body.Value, Is.SameAs(source2));
}
public void EvaluateWholeQueryTree_WhoseLambdasAreInMemberExpressions_InsteadOfUnaryExpressions()
{
var source = ExpressionHelper.CreateQueryable <Cook> ();
Expression <Func <Cook, bool> > predicate = s1 => false;
var queryExpression = ExpressionHelper.MakeExpression(() => source.Where(predicate));
Assert.That(((MethodCallExpression)queryExpression).Arguments[1].NodeType, Is.EqualTo(ExpressionType.MemberAccess),
"Usually, this would be a UnaryExpression (Quote containing the Lambda); but we pass a MemberExpression containing the lambda.");
var partiallyEvaluatedExpression = PartialEvaluatingExpressionTreeVisitor.EvaluateIndependentSubtrees(queryExpression);
var whereMethodCallExpression = (MethodCallExpression)partiallyEvaluatedExpression;
var wherePredicateNavigator = new ExpressionTreeNavigator(whereMethodCallExpression.Arguments[1]);
var wherePredicateLambdaNavigator = new ExpressionTreeNavigator((Expression)wherePredicateNavigator.Value);
Assert.That(wherePredicateLambdaNavigator.Body.Value, Is.EqualTo(false));
}
public void EvaluateWholeQueryTree_ThatDoesNotUseItsParameters()
{
var source = ExpressionHelper.CreateQueryable <Cook> ();
var query = from s1 in source
where false
select 0 + int.Parse("0");
var partiallyEvaluatedExpression = PartialEvaluatingExpressionTreeVisitor.EvaluateIndependentSubtrees(query.Expression);
var selectMethodCallExpression = (MethodCallExpression)partiallyEvaluatedExpression;
var whereMethodCallExpression = (MethodCallExpression)selectMethodCallExpression.Arguments[0];
var selectSelectorNavigator = new ExpressionTreeNavigator(selectMethodCallExpression.Arguments[1]);
var wherePredicateNavigator = new ExpressionTreeNavigator(whereMethodCallExpression.Arguments[1]);
Assert.That(selectSelectorNavigator.Operand.Body.Value, Is.EqualTo(0));
Assert.That(wherePredicateNavigator.Operand.Body.Value, Is.EqualTo(false));
}
public void EvaluateWholeQueryTree_WhoseLambdasAreInMemberExpressions_InsteadOfUnaryExpressions ()
{
var source = ExpressionHelper.CreateQueryable<Cook> ();
Expression<Func<Cook, bool>> predicate = s1 => false;
var queryExpression = ExpressionHelper.MakeExpression (() => source.Where (predicate));
Assert.That (((MethodCallExpression) queryExpression).Arguments[1].NodeType, Is.EqualTo (ExpressionType.MemberAccess),
"Usually, this would be a UnaryExpression (Quote containing the Lambda); but we pass a MemberExpression containing the lambda.");
var partiallyEvaluatedExpression = PartialEvaluatingExpressionVisitor.EvaluateIndependentSubtrees (
queryExpression,
new TestEvaluatableExpressionFilter());
var whereMethodCallExpression = (MethodCallExpression) partiallyEvaluatedExpression;
var wherePredicateNavigator = new ExpressionTreeNavigator (whereMethodCallExpression.Arguments[1]);
var wherePredicateLambdaNavigator = new ExpressionTreeNavigator ((Expression) wherePredicateNavigator.Value);
Assert.That (wherePredicateLambdaNavigator.Body.Value, Is.EqualTo (false));
}
public void EvaluateWholeQueryTree_ThatDoesNotUseItsParameters ()
{
var source = ExpressionHelper.CreateQueryable<Cook> ();
var query = from s1 in source
where false
select 0 + int.Parse ("0");
var partiallyEvaluatedExpression = PartialEvaluatingExpressionVisitor.EvaluateIndependentSubtrees (
query.Expression,
new TestEvaluatableExpressionFilter());
var selectMethodCallExpression = (MethodCallExpression) partiallyEvaluatedExpression;
var whereMethodCallExpression = (MethodCallExpression) selectMethodCallExpression.Arguments[0];
var selectSelectorNavigator = new ExpressionTreeNavigator (selectMethodCallExpression.Arguments[1]);
var wherePredicateNavigator = new ExpressionTreeNavigator (whereMethodCallExpression.Arguments[1]);
Assert.That (selectSelectorNavigator.Operand.Body.Value, Is.EqualTo (0));
Assert.That (wherePredicateNavigator.Operand.Body.Value, Is.EqualTo (false));
}
public void EvaluateWholeQueryTree ()
{
// ReSharper disable ConvertToConstant.Local
var i = 1;
// ReSharper restore ConvertToConstant.Local
var source1 = ExpressionHelper.CreateQueryable<Cook> ();
var source2 = ExpressionHelper.CreateQueryable<Cook> ();
var query = from s1 in source1
from s2 in source2
where 2 > i + 5
select s1.ID + (1 + i);
var partiallyEvaluatedExpression = PartialEvaluatingExpressionVisitor.EvaluateIndependentSubtrees (
query.Expression,
new TestEvaluatableExpressionFilter());
var selectMethodCallExpression = (MethodCallExpression) partiallyEvaluatedExpression;
var whereMethodCallExpression = (MethodCallExpression) selectMethodCallExpression.Arguments[0];
var selectManyMethodCallExpression = (MethodCallExpression) whereMethodCallExpression.Arguments[0];
var selectSelectorNavigator = new ExpressionTreeNavigator (selectMethodCallExpression.Arguments[1]);
var wherePredicateNavigator = new ExpressionTreeNavigator (whereMethodCallExpression.Arguments[1]);
var selectManyCollectionSelectorNavigator = new ExpressionTreeNavigator (selectManyMethodCallExpression.Arguments[1]);
Assert.That (selectSelectorNavigator.Operand.Body.Right.Value, Is.EqualTo (2));
Assert.That (wherePredicateNavigator.Operand.Body.Value, Is.EqualTo (false));
Assert.That (selectManyCollectionSelectorNavigator.Operand.Body.Value, Is.SameAs (source2));
}
