public void Should_not_change_expression_if_expression_not_exists()
{
Expression <Func <int, bool> > expression = s => s == 1;
var visitor = new ExpressionReplacingVisitor(Expression.Constant(1), Expression.Constant(2));
var visitedExpression = visitor.Visit(expression);
visitedExpression.Should().Be(expression);
}
public void Should_replace_found_expression()
{
Expression <Func <int, bool> > expression = s => s == 1;
var oldExpression = expression.As <LambdaExpression>().Body.As <BinaryExpression>().Right;
var newExpression = Expression.Constant(2);
var visitor = new ExpressionReplacingVisitor(oldExpression, newExpression);
var visitedExpression = visitor.Visit(expression);
visitedExpression.As <LambdaExpression>().Body.As <BinaryExpression>().Right.Should().Be(newExpression);
}
