public void CreateExpression_DateOutsideOfWindowAndIsMonday_BuildsExpression(int year, int month, int day, bool validates, int numberOfErrorMsg)
{
// Test: (DateTime d) => (d < floorDate | d > ceilingDate) & d.DayOfWeek == DayOfWeek.Monday
var floorDate = new DateTime(2010, 2, 1);
var ceilingDate = new DateTime(2010, 3, 1);
var testDate = new DateTime(year, month, day);
// build rule / rule node for "d.DayOfWeek == DayOfWeek.Monday
var dateOneMondayRule = new CustomRule<CalendarEvent, DateTime>((c, d) => d.DayOfWeek == DayOfWeek.Monday);
dateOneMondayRule.Message = "Date does not fall on a Monday.";
var dateOneMondayRuleNode = new RuleNode(dateOneMondayRule);
// build rules / rule nodes for "d < floorDate | d > ceilingDate"
var rangeRuleNode = new RuleNode(new LessThan<CalendarEvent, DateTime>(floorDate));
rangeRuleNode.OrChild(new RuleNode(new GreaterThan<CalendarEvent, DateTime>(ceilingDate)));
// put the rules / rule nodes together using a group to enforce the "or" precidence over the "and"
var groupNode = new GroupNode(rangeRuleNode);
groupNode.AndChild(dateOneMondayRuleNode);
var tree = new RuleTree<CalendarEvent, DateTime>(groupNode);
Assert.That(tree.LambdaExpression, Is.Not.Null);
var context = BuildContextForCalendarEventStartDate(testDate);
var notification = new ValidationNotification();
var isValid = tree.LambdaExpression(context, null, notification);
Assert.That(isValid, Is.EqualTo(validates));
}
public Func <RuleValidatorContext <T, TProperty>, SpecificationContainer, ValidationNotification, bool> CreateExpression(RuleTree <T, TProperty> tree)
{
var contextParam = Expression.Parameter(typeof(RuleValidatorContext <T, TProperty>), "context");
var specContainerParam = Expression.Parameter(typeof(SpecificationContainer), "container");
var specNotificationParam = Expression.Parameter(typeof(ValidationNotification), "notification");
var expression = BuildExpression(tree.Root, contextParam, specContainerParam, specNotificationParam);
var lambda = Expression.Lambda(expression, new ParameterExpression[] { contextParam, specContainerParam, specNotificationParam });
var compiledFunc = lambda.Compile() as Func <RuleValidatorContext <T, TProperty>, SpecificationContainer, ValidationNotification, bool>;
return(compiledFunc);
}
