public void VisitParameter()
{
var expression = (ParameterExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Parameter);
var result = (ParameterExpression)InvokeAndCheckVisit("VisitParameter", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitConstant()
{
var expression = (ConstantExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Constant);
var result = (ConstantExpression)InvokeAndCheckVisit("VisitConstant", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitAndConvert_Single_ThrowsOnNull()
{
var expression = (BinaryExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Add);
Expect.Call(VisitorMock.Visit(expression)).Return(null);
InvokeVisitAndConvert(expression, "VisitMethod");
}
public void VisitTypeBinary_Unchanged()
{
var expression = (TypeBinaryExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.TypeIs);
Expect.Call(VisitorMock.Visit(expression.Expression)).Return(expression.Expression);
var result = (TypeBinaryExpression)InvokeAndCheckVisit("VisitTypeBinary", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitMember_Unchanged()
{
var expression = (MemberExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.MemberAccess);
Expect.Call(VisitorMock.Visit(expression.Expression)).Return(expression.Expression);
var result = (MemberExpression)InvokeAndCheckVisit("VisitMember", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitUnary_Unchanges()
{
var expression = (UnaryExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.UnaryPlus);
Expression expectedNextVisit = expression.Operand;
Expect.Call(VisitorMock.Visit(expectedNextVisit)).Return(expectedNextVisit);
Assert.That(InvokeAndCheckVisit("VisitUnary", expression), Is.SameAs(expression));
}
public void VisitNew_Unchanged()
{
var expression = (NewExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.New);
var argument = expression.Arguments.Single();
Expect.Call(VisitorMock.Visit(argument)).Return(argument);
var result = (NewExpression)InvokeAndCheckVisit("VisitNew", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitNewArray_Unchanged()
{
var expression = (NewArrayExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.NewArrayInit);
var initExpression = expression.Expressions.Single();
Expect.Call(VisitorMock.Visit(initExpression)).Return(initExpression);
var result = (NewArrayExpression)InvokeAndCheckVisit("VisitNewArray", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitAndConvert_Single_NoConvert()
{
var expression = (BinaryExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Add);
Expect.Call(VisitorMock.Visit(expression)).Return(expression);
var result = InvokeVisitAndConvert(expression, "Add");
Assert.That(result, Is.SameAs(expression));
}
public void VisitMemberInit_Unchanged()
{
var expression = (MemberInitExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.MemberInit);
var binding = expression.Bindings.Single();
Expect.Call(VisitorMock.Visit(expression.NewExpression)).Return(expression.NewExpression);
Expect.Call(InvokeVisitMethod("VisitMemberBinding", binding)).Return(binding);
var result = (MemberInitExpression)InvokeAndCheckVisit("VisitMemberInit", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitConditional_Unchanged()
{
var expression = (ConditionalExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Conditional);
Expect.Call(VisitorMock.Visit(expression.Test)).Return(expression.Test);
Expect.Call(VisitorMock.Visit(expression.IfTrue)).Return(expression.IfTrue);
Expect.Call(VisitorMock.Visit(expression.IfFalse)).Return(expression.IfFalse);
var result = (ConditionalExpression)InvokeAndCheckVisit("VisitConditional", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitListInit_Unchanged()
{
var expression = (ListInitExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.ListInit);
var elementInit = expression.Initializers.Single();
Expect.Call(VisitorMock.Visit(expression.NewExpression)).Return(expression.NewExpression);
Expect.Call(InvokeVisitMethod("VisitElementInit", elementInit)).Return(elementInit);
var result = (ListInitExpression)InvokeAndCheckVisit("VisitListInit", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitBinary_Unchanged()
{
BinaryExpression expression = (BinaryExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Add);
Expect.Call(VisitorMock.Visit(expression.Left)).Return(expression.Left);
Expect.Call(VisitorMock.Visit(expression.Right)).Return(expression.Right);
BinaryExpression result = (BinaryExpression)InvokeAndCheckVisit("VisitBinary", expression);
Assert.That(result, Is.SameAs(expression));
}
public void VisitMember_ChangedExpression()
{
var expression = (MemberExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.MemberAccess);
Expression newExpression = Expression.Constant(DateTime.Now);
Expect.Call(VisitorMock.Visit(expression.Expression)).Return(newExpression);
var result = (MemberExpression)InvokeAndCheckVisit("VisitMember", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.MemberAccess));
Assert.That(result.Expression, Is.SameAs(newExpression));
}
public void VisitAndConvert_Collection_ExceptionUsesCallerName()
{
var constantExpression = Expression.Constant(1);
var expressions = new List <ConstantExpression> (new[] { constantExpression }).AsReadOnly();
var newExpression = (NewExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.New);
Expect.Call(VisitorMock.Visit(constantExpression)).Return(newExpression);
VisitorMock.Replay();
VisitorMock.VisitAndConvert(expressions, "Whatever");
}
public void VisitTypeBinary_Changed()
{
var expression = (TypeBinaryExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.TypeIs);
Expression newExpression = Expression.Constant(1);
Expect.Call(VisitorMock.Visit(expression.Expression)).Return(newExpression);
var result = (TypeBinaryExpression)InvokeAndCheckVisit("VisitTypeBinary", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.TypeIs));
Assert.That(result.Expression, Is.SameAs(newExpression));
}
public void VisitNew_ChangedArguments()
{
var expression = (NewExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.New);
var argument = expression.Arguments.Single();
Expression newArgument = Expression.Constant(214578);
Expect.Call(VisitorMock.Visit(argument)).Return(newArgument);
var result = (NewExpression)InvokeAndCheckVisit("VisitNew", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.New));
Assert.That(result.Arguments, Is.EqualTo(new[] { newArgument }));
}
public void VisitUnary_Negate_Changes()
{
var expression = (UnaryExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Negate);
Expression expectedNextVisit = expression.Operand;
Expression newOperand = Expression.Constant(1);
Expect.Call(VisitorMock.Visit(expectedNextVisit)).Return(newOperand);
var result = (UnaryExpression)InvokeAndCheckVisit("VisitUnary", expression);
Assert.That(result.Operand, Is.SameAs(newOperand));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.Negate));
}
public void VisitNewArray_Init_Changed()
{
var expression = (NewArrayExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.NewArrayInit);
var initExpression = expression.Expressions.Single();
var newInitExpression = Expression.Constant(214578);
Expect.Call(VisitorMock.Visit(initExpression)).Return(newInitExpression);
var result = (NewArrayExpression)InvokeAndCheckVisit("VisitNewArray", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.NewArrayInit));
Assert.That(result.Expressions, Is.EqualTo(new[] { newInitExpression }));
Assert.That(result.Type, Is.EqualTo(typeof(int[])));
}
public void VisitMethodCall_ChangedObject()
{
var expression = (MethodCallExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Call);
var argument = expression.Arguments.Single();
Expression newObject = Expression.Constant(1);
Expect.Call(VisitorMock.Visit(expression.Object)).Return(newObject);
Expect.Call(VisitorMock.Visit(argument)).Return(argument);
var result = (MethodCallExpression)InvokeAndCheckVisit("VisitMethodCall", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.Call));
Assert.That(result.Object, Is.SameAs(newObject));
Assert.That(result.Arguments, Is.SameAs(expression.Arguments));
}
public void VisitBinary_RightChanged()
{
BinaryExpression expression = (BinaryExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Subtract);
Expression newOperand = Expression.Constant(1);
Expect.Call(VisitorMock.Visit(expression.Left)).Return(expression.Left);
Expect.Call(VisitorMock.Visit(expression.Right)).Return(newOperand);
BinaryExpression result = (BinaryExpression)InvokeAndCheckVisit("VisitBinary", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.Subtract));
Assert.That(result.Left, Is.SameAs(expression.Left));
Assert.That(result.Right, Is.SameAs(newOperand));
}
public void VisitListInit_ChangedInitializers()
{
var expression = (ListInitExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.ListInit);
var initializer = expression.Initializers.Single();
var newInitializer = Expression.ElementInit(typeof(List <int>).GetMethod("Add"), Expression.Constant(214578));
Expect.Call(VisitorMock.Visit(expression.NewExpression)).Return(expression.NewExpression);
Expect.Call(InvokeVisitMethod("VisitElementInit", initializer)).Return(newInitializer);
var result = (ListInitExpression)InvokeAndCheckVisit("VisitListInit", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.ListInit));
Assert.That(result.Initializers, Is.EqualTo(new[] { newInitializer }));
Assert.That(result.NewExpression, Is.SameAs(expression.NewExpression));
}
public void VisitMemberInit_ChangedNewExpression()
{
var expression = (MemberInitExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.MemberInit);
var binding = expression.Bindings.Single();
NewExpression newNewExpression = Expression.New(typeof(List <int>));
Expect.Call(VisitorMock.Visit(expression.NewExpression)).Return(newNewExpression);
Expect.Call(InvokeVisitMethod("VisitMemberBinding", binding)).Return(binding);
var result = (MemberInitExpression)InvokeAndCheckVisit("VisitMemberInit", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.MemberInit));
Assert.That(result.NewExpression, Is.SameAs(newNewExpression));
Assert.That(result.Bindings, Is.SameAs(expression.Bindings));
}
public void VisitMemberInit_InvalidNewExpression()
{
var expression = (MemberInitExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.MemberInit);
var binding = expression.Bindings.Single();
Expect.Call(VisitorMock.Visit(expression.NewExpression)).Return(Expression.Constant(0));
Expect.Call(InvokeVisitMethod("VisitMemberBinding", binding)).Return(binding);
try
{
InvokeAndCheckVisit("VisitMemberInit", expression);
}
catch (TargetInvocationException ex)
{
throw ex.InnerException;
}
}
public void VisitConditional_ChangedTrue()
{
var expression = (ConditionalExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.Conditional);
Expression newTrue = Expression.Constant(1);
Expect.Call(VisitorMock.Visit(expression.Test)).Return(expression.Test);
Expect.Call(VisitorMock.Visit(expression.IfTrue)).Return(newTrue);
Expect.Call(VisitorMock.Visit(expression.IfFalse)).Return(expression.IfFalse);
var result = (ConditionalExpression)InvokeAndCheckVisit("VisitConditional", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.Conditional));
Assert.That(result.Test, Is.SameAs(expression.Test));
Assert.That(result.IfTrue, Is.SameAs(newTrue));
Assert.That(result.IfFalse, Is.SameAs(expression.IfFalse));
}
public void VisitListInit_InvalidNewExpression()
{
var expression = (ListInitExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.ListInit);
var elementInit = expression.Initializers.Single();
Expect.Call(VisitorMock.Visit(expression.NewExpression)).Return(Expression.Constant(0));
Expect.Call(InvokeVisitMethod("VisitElementInit", elementInit)).Return(elementInit);
try
{
InvokeAndCheckVisit("VisitListInit", expression);
}
catch (TargetInvocationException ex)
{
throw ex.InnerException;
}
}
public void VisitMemberInit_ChangedBindings()
{
var expression = (MemberInitExpression)ExpressionInstanceCreator.GetExpressionInstance(ExpressionType.MemberInit);
var binding = expression.Bindings.Single();
var capacityProperty = expression.NewExpression.Constructor.DeclaringType.GetProperty("Capacity");
MemberBinding newBinding = Expression.Bind(capacityProperty, Expression.Constant(214578));
Expect.Call(VisitorMock.Visit(expression.NewExpression)).Return(expression.NewExpression);
Expect.Call(InvokeVisitMethod("VisitMemberBinding", binding)).Return(newBinding);
var result = (MemberInitExpression)InvokeAndCheckVisit("VisitMemberInit", expression);
Assert.That(result, Is.Not.SameAs(expression));
Assert.That(result.NodeType, Is.EqualTo(ExpressionType.MemberInit));
Assert.That(result.Bindings, Is.EqualTo(new[] { newBinding }));
Assert.That(result.NewExpression, Is.SameAs(expression.NewExpression));
}
