public void Calculation()
{
IEvaluationEngine engine = null;
Logger logExtension = null;
"establish"._(() =>
{
logExtension = new Logger();
engine = new EvaluationEngine();
engine.SetLogExtension(logExtension);
engine.Solve <HowManyFruitsAreThereStartingWith, int, char>()
.AggregateWithExpressionAggregator(0, (aggregate, value) => aggregate + value)
.ByEvaluating(q => new ParametrizedFruitExpression {
Kind = "Apple", Count = 1
})
.When(q => true)
.ByEvaluating(q => new[] { new ParametrizedFruitExpression {
Kind = "Ananas", Count = 2
}, new ParametrizedFruitExpression {
Kind = "Banana", Count = 4
} })
.ByEvaluating((q, p) => p == 'B' ? 8 : 0)
.When(q => false)
.ByEvaluating(q => new ParametrizedFruitExpression {
Kind = "Unknown"
});
});
"when an answer is calculated"._(() =>
{
engine.Answer(new HowManyFruitsAreThereStartingWith(), 'A');
});
"it should log how answer was derived"._(() =>
{
logExtension.FoundAnswerLog
.Should().Contain(HowManyFruitsAreThereStartingWith.Description, "answered question")
.And.Contain("aggregator strategy", "used strategy")
.And.Contain("expression aggregator with seed '0' and aggregate function (aggregate, value) => (aggregate + value)", "used aggregator")
.And.Contain("Parameter = A", "provided parameter")
.And.Contain("Answer = 3", "calculated answer")
.And.Contain("1 Apple returned 1", "used expression with result")
.And.Contain("2 Ananas returned 2", "used expression with result")
.And.Contain("4 Banana returned 0", "used expression with result")
.And.Contain("inline expression = (q, p) => IIF((Convert(p) == 66), 8, 0) returned 0", "used expression with result")
.And.NotContain("Unknown", "unknwon expression should not be evaluated due to unfulfilled constraint");
});
}
/// <summary>
/// Main method.
/// </summary>
/// <param name="args">The command line arguments.</param>
public static void Main(string[] args)
{
var evaluationEngine = new EvaluationEngine();
evaluationEngine.SetLogExtension(new ConsoleLogger());
var questioner = new Questioner(evaluationEngine);
var answerer = new Answerer(evaluationEngine);
answerer.PrepareAnswers();
questioner.Ask();
Console.ReadLine();
}
