public void DescribesItselfWithSeedAndAggregationFunction()
{
const string Seed = "seed";
Expression <Func <string, string, string> > aggregateFunc = (aggregate, value) => aggregate + value;
var testee = new ExpressionAggregator <string, string>(Seed, aggregateFunc);
string description = testee.Describe();
description.Should().Be("expression aggregator with seed 'seed' and aggregate function (aggregate, value) => (aggregate + value)");
}
public void AggregatesResultsOfEvaluatedExpressionsWithSpecifiedAggregationFunction()
{
const string Seed = "";
var expressions = new IExpression <int, int>[]
{
new TestExpression {
Value = 1
},
new TestExpression {
Value = 2
}
};
var testee = new ExpressionAggregator <int, string, int>(Seed, (sum, expressionResult) => sum + expressionResult);
var answer = testee.Aggregate(expressions, 5, new Context());
answer.Should().Be("67");
}