public void EmptyBlockRuleThrowsException()
{
var emptyBlockRule = new FuncBlockRule <object, object>();
var exception = Assert.Throws <RuleEngineException>(() => emptyBlockRule.Compile());
exception.Message.Should().Be("last rule must return a value of System.Object");
}
public void ExceptionWhenLastRuleReturnsNoValue()
{
var someRule = new ConditionalIfThActionRule <object>();
var someBlockRule = new FuncBlockRule <object, object>();
someBlockRule.Rules.Add(someRule);
var exception = Assert.Throws <RuleEngineException>(() => someBlockRule.Compile());
exception.Message.Should().Be("last rule must return a value of System.Object");
}
public void ReturnsUpdatedGame()
{
var nameChangeRule = new UpdateValueRule <Game>
{
ObjectToUpdate = "Name",
SourceDataRule = new ConstantRule <string> {
Value = "some fancy name"
}
};
var rankingChangeRule = new UpdateValueRule <Game>
{
ObjectToUpdate = "Ranking",
SourceDataRule = new ConstantRule <int> {
Value = "1000"
}
};
var descriptionChangeRule = new UpdateValueRule <Game>
{
ObjectToUpdate = "Description",
SourceDataRule = new ConstantRule <string> {
Value = "some cool description"
}
};
var selfReturnRule = new SelfReturnRule <Game>();
var blockRule = new FuncBlockRule <Game, Game>();
blockRule.Rules.Add(nameChangeRule);
blockRule.Rules.Add(rankingChangeRule);
blockRule.Rules.Add(descriptionChangeRule);
blockRule.Rules.Add(selfReturnRule);
var compileResult = blockRule.Compile();
compileResult.Should().BeTrue();
_testOutputHelper.WriteLine($"{nameof(blockRule)}:{Environment.NewLine}" +
$"{blockRule.ExpressionDebugView()}");
var game = blockRule.Execute(new Game());
game.Name.Should().Be("some fancy name");
game.Ranking.Should().Be(1000);
game.Description.Should().Be("some cool description");
_testOutputHelper.WriteLine($"{game}");
}
public void FuncBlockRuleReturnsLastRuleResult()
{
var ruleReturning5 = new ConstantRule <int, int> {
Value = "5"
};
var blockRule = new FuncBlockRule <int, int>();
blockRule.Rules.Add(ruleReturning5);
var compileResult = blockRule.Compile();
compileResult.Should().BeTrue();
_testOutputHelper.WriteLine($"{nameof(ruleReturning5)}:{Environment.NewLine}" +
$"{ruleReturning5.ExpressionDebugView()}");
var five = blockRule.Execute(99);
five.Should().Be(5);
}
public void ReturnsNewOrUpdatedGame()
{
var nullGame = new ConstantRule <Game> {
Value = "null"
};
var nullGameCheckRule = new ValidationRule <Game>
{
ValueToValidateAgainst = nullGame,
OperatorToUse = "Equal"
};
var newGameRule = new StaticMethodCallRule <Game>
{
MethodClassName = "ModelForUnitTests.Game",
MethodToCall = "CreateGame"
};
var selfReturnRule = new SelfReturnRule <Game>();
var gameObjectRule = new ConditionalFuncRule <Game, Game>
{
ConditionRule = nullGameCheckRule,
TrueRule = newGameRule,
FalseRule = selfReturnRule
};
var assignRule = new UpdateValueRule <Game> {
SourceDataRule = gameObjectRule
};
var nameChangeRule = new UpdateValueRule <Game>
{
ObjectToUpdate = "Name",
SourceDataRule = new ConstantRule <string> {
Value = "some fancy name"
}
};
var rankingChangeRule = new UpdateValueRule <Game>
{
ObjectToUpdate = "Ranking",
SourceDataRule = new ConstantRule <int> {
Value = "1000"
}
};
var descriptionChangeRule = new UpdateValueRule <Game>
{
ObjectToUpdate = "Description",
SourceDataRule = new ConstantRule <string> {
Value = "some cool description"
}
};
var blockRule = new FuncBlockRule <Game, Game>();
blockRule.Rules.Add(assignRule);
blockRule.Rules.Add(nameChangeRule);
blockRule.Rules.Add(rankingChangeRule);
blockRule.Rules.Add(descriptionChangeRule);
blockRule.Rules.Add(selfReturnRule);
var compileResult = blockRule.Compile();
compileResult.Should().BeTrue();
_testOutputHelper.WriteLine($"{nameof(blockRule)}:{Environment.NewLine}" +
$"{blockRule.ExpressionDebugView()}");
var game = blockRule.Execute(null);
game.Name.Should().Be("some fancy name");
game.Ranking.Should().Be(1000);
game.Description.Should().Be("some cool description");
game.Rating.Should().BeNullOrEmpty();
_testOutputHelper.WriteLine($"{game}");
var newGame = new Game {
Rating = "high"
};
// newGame is not same as game object
ReferenceEquals(game, newGame).Should().BeFalse();
game = blockRule.Execute(newGame);
// this call shall return the same newGame object with updated values
ReferenceEquals(game, newGame).Should().BeTrue();
game.Rating.Should().Be("high");
_testOutputHelper.WriteLine($"newGame: {game}");
}