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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under MIT X11 license (for details please see \doc\license.txt)
using System;
using NUnit.Framework;
namespace ICSharpCode.NRefactory.CSharp.Parser.Expression
{
[TestFixture]
public class QueryExpressionTests
{
[Test]
public void SimpleExpression()
{
ParseUtilCSharp.AssertExpression(
"from c in customers where c.City == \"London\" select c",
new QueryExpression {
Clauses = {
new QueryFromClause {
Identifier = "c",
Expression = new IdentifierExpression("customers")
},
new QueryWhereClause {
Condition = new BinaryOperatorExpression {
Left = new IdentifierExpression("c").Member("City"),
Operator = BinaryOperatorType.Equality,
Right = new PrimitiveExpression("London")
}
},
new QuerySelectClause {
Expression = new IdentifierExpression("c")
}
}});
}
[Test]
public void ExpressionWithType1()
{
ParseUtilCSharp.AssertExpression(
"from Customer c in customers select c",
new QueryExpression {
Clauses = {
new QueryFromClause {
Type = new SimpleType("Customer"),
Identifier = "c",
Expression = new IdentifierExpression("customers")
},
new QuerySelectClause {
Expression = new IdentifierExpression("c")
}
}});
}
[Test]
public void ExpressionWithType2()
{
ParseUtilCSharp.AssertExpression(
"from int c in customers select c",
new QueryExpression {
Clauses = {
new QueryFromClause {
Type = new PrimitiveType("int"),
Identifier = "c",
Expression = new IdentifierExpression("customers")
},
new QuerySelectClause {
Expression = new IdentifierExpression("c")
}
}});
}
[Test]
public void ExpressionWithType3()
{
ParseUtilCSharp.AssertExpression(
"from S<int[]>? c in customers select c",
new QueryExpression {
Clauses = {
new QueryFromClause {
Type = new ComposedType {
BaseType = new SimpleType {
Identifier = "S",
TypeArguments = {
new PrimitiveType("int").MakeArrayType()
}
},
HasNullableSpecifier = true
},
Identifier = "c",
Expression = new IdentifierExpression("customers")
},
new QuerySelectClause {
Expression = new IdentifierExpression("c")
}
}});
}
[Test]
public void MultipleGenerators()
{
ParseUtilCSharp.AssertExpression(
@"
from c in customers
where c.City == ""London""
from o in c.Orders
where o.OrderDate.Year == 2005
select new { c.Name, o.OrderID, o.Total }",
new QueryExpression {
Clauses = {
new QueryFromClause {
Identifier = "c",
Expression = new IdentifierExpression("customers")
},
new QueryWhereClause {
Condition = new BinaryOperatorExpression {
Left = new IdentifierExpression("c").Member("City"),
Operator = BinaryOperatorType.Equality,
Right = new PrimitiveExpression("London")
}
},
new QueryFromClause {
Identifier = "o",
Expression = new IdentifierExpression("c").Member("Orders")
},
new QueryWhereClause {
Condition = new BinaryOperatorExpression {
Left = new IdentifierExpression("o").Member("OrderDate").Member("Year"),
Operator = BinaryOperatorType.Equality,
Right = new PrimitiveExpression(2005)
}
},
new QuerySelectClause {
Expression = new AnonymousTypeCreateExpression {
Initializer = {
new IdentifierExpression("c").Member("Name"),
new IdentifierExpression("o").Member("OrderID"),
new IdentifierExpression("o").Member("Total")
}
}
}
}});
}
[Test]
public void ExpressionWithOrderBy()
{
ParseUtilCSharp.AssertExpression(
"from c in customers orderby c.Name select c",
new QueryExpression {
Clauses = {
new QueryFromClause {
Identifier = "c",
Expression = new IdentifierExpression("customers")
},
new QueryOrderClause {
Orderings = {
new QueryOrdering {
Expression = new IdentifierExpression("c").Member("Name")
}
}
},
new QuerySelectClause {
Expression = new IdentifierExpression("c")
}
}});
}
[Test]
public void ExpressionWithOrderByAndLet()
{
ParseUtilCSharp.AssertExpression(
"from c in customers orderby c.Name descending let x = c select x",
new QueryExpression {
Clauses = {
new QueryFromClause {
Identifier = "c",
Expression = new IdentifierExpression("customers")
},
new QueryOrderClause {
Orderings = {
new QueryOrdering {
Expression = new IdentifierExpression("c").Member("Name"),
Direction = QueryOrderingDirection.Descending
}
}
},
new QueryLetClause {
Identifier = "x",
Expression = new IdentifierExpression("c")
},
new QuerySelectClause {
Expression = new IdentifierExpression("x")
}
}});
}
[Test]
public void QueryContinuation()
{
ParseUtilCSharp.AssertExpression(
"from a in b select c into d select e",
new QueryExpression {
Clauses = {
new QueryContinuationClause {
PrecedingQuery = new QueryExpression {
Clauses = {
new QueryFromClause {
Identifier = "a",
Expression = new IdentifierExpression("b")
},
new QuerySelectClause { Expression = new IdentifierExpression("c") }
}
},
Identifier = "d"
},
new QuerySelectClause { Expression = new IdentifierExpression("e") }
}
}
);
}
[Test]
public void QueryContinuationWithMultipleFrom()
{
ParseUtilCSharp.AssertExpression(
"from a in b from c in d select e into f select g",
new QueryExpression {
Clauses = {
new QueryContinuationClause {
PrecedingQuery = new QueryExpression {
Clauses = {
new QueryFromClause {
Identifier = "a",
Expression = new IdentifierExpression("b")
},
new QueryFromClause {
Identifier = "c",
Expression = new IdentifierExpression("d")
},
new QuerySelectClause { Expression = new IdentifierExpression("e") }
}
},
Identifier = "f"
},
new QuerySelectClause { Expression = new IdentifierExpression("g") }
}
}
);
}
[Test]
public void MultipleQueryContinuation()
{
ParseUtilCSharp.AssertExpression(
"from a in b select c into d select e into f select g",
new QueryExpression {
Clauses = {
new QueryContinuationClause {
PrecedingQuery = new QueryExpression {
Clauses = {
new QueryContinuationClause {
PrecedingQuery = new QueryExpression {
Clauses = {
new QueryFromClause {
Identifier = "a",
Expression = new IdentifierExpression("b")
},
new QuerySelectClause { Expression = new IdentifierExpression("c") }
}
},
Identifier = "d"
},
new QuerySelectClause { Expression = new IdentifierExpression("e") }
}
},
Identifier = "f"
},
new QuerySelectClause { Expression = new IdentifierExpression("g") }
}});
}
}
}