public void CompilingAnInvalidRuleSetThrowsAnException()
{
var rs = new RuleSet();
Assert.Throws(typeof(Exception), delegate
{
IRuleEngine engine = WFRuleEngine.Compile(rs);
});
}
public void CompilingAValidRuleSetReturnsARuleEngine()
{
var rs = new RuleSet { Name = "Whatever" };
Assert.DoesNotThrow(delegate
{
IRuleEngine engine = WFRuleEngine.Compile(rs);
engine.Invoke(_workingMemory);
});
}
public void RuleSetIsValidIfRulesAreValid()
{
var rule = new Rule { Name = "First Rule", TopCondition = new LogicCondition { Operator = "all" } };
var action1 = new AssignAction { LeftHandSide = "Person.Salutation", Value = "Mr." };
var action2 = new AssignAction { LeftHandSide = "Person.Greeting", Value = "Hello" };
rule.AddAction(action1);
rule.AddAction(action2);
var rs = new RuleSet { Name = "Whatever" };
rs.AddInput("Person", typeof(TestPerson));
rs.AddRule(rule);
Assert.IsTrue(rs.IsValid());
}
public static WFRuleEngine Compile(RuleSet ruleSet)
{
if (ruleSet.IsValid())
{
var activity = new DynamicActivity();
CompileInputs(activity, ruleSet);
var implementation = CompileRules(ruleSet);
activity.Implementation = () => implementation;
return new WFRuleEngine(activity);
}
else
{
throw new Exception("RuleSet cannot be compiled.");
}
}
public void InvokingWithIncorrectWorkingMemoryThrowsAnException()
{
var rule = new Rule { Name = "First Rule", TopCondition = new LogicCondition { Operator = "all" } };
var action1 = new AssignAction { LeftHandSide = "Person.Salutation", Value = "Mr." };
rule.AddAction(action1);
var rs = new RuleSet { Name = "Whatever" };
rs.AddInput("Person", typeof(TestPerson));
rs.AddRule(rule);
IRuleEngine engine = WFRuleEngine.Compile(rs);
Assert.Throws(typeof(InvalidWorkflowException), delegate
{
engine.Invoke(_workingMemory);
});
}
public void SetUp()
{
_workingMemory = new Dictionary<string, object>();
_ruleSet = new RuleSet { Name = "Test RuleSet" };
_ruleSet.AddInput("Person", typeof(TestPerson));
}
private static Sequence CompileRules(RuleSet ruleSet)
{
var sequence = new Sequence();
foreach (var rule in ruleSet.Rules)
{
var condition = CompileConditions(rule.TopCondition, ruleSet.Inputs);
condition.Then = CompileActions(rule, ruleSet.Inputs);
sequence.Activities.Add(condition);
}
return sequence;
}
private static void CompileInputs(DynamicActivity activity, RuleSet ruleSet)
{
var settings = new VisualBasicSettings();
foreach (var input in ruleSet.Inputs)
{
var inProperty = new DynamicActivityProperty
{
Name = input.Key,
Type = typeof(InArgument<>).MakeGenericType(input.Value)
};
activity.Properties.Add(inProperty);
settings.ImportReferences.Add(new VisualBasicImportReference
{
Assembly = input.Value.Assembly.GetName().Name,
Import = input.Value.Namespace
});
}
VisualBasic.SetSettings(activity, settings);
}
public void RuleSetWithoutNameIsInvalid()
{
var rs = new RuleSet();
Assert.IsFalse(rs.IsValid());
}
public void EmptyRuleSetIsValid()
{
var rs = new RuleSet { Name = "Whatever" };
Assert.IsTrue(rs.IsValid());
}
public void CanAddRulesToRuleSet()
{
var rs = new RuleSet { Name = "Whatever" };
var rule = new Rule { TopCondition = new LogicCondition { Operator = "all" } };
Assert.DoesNotThrow(delegate { rs.AddRule(rule); });
}
public void CanAddInputsToRuleSet()
{
var rs = new RuleSet { Name = "Whatever" };
Assert.DoesNotThrow(delegate { rs.AddInput("Person", typeof(TestPerson)); });
}