public void Forecast_8_issues()
{
const int N_RESOURCES = 3;
var issues = IssueRepository.Import().ToArray();
IEnumerable <Issue> Filter_issues(params string[] tags) => issues.Where(i => tags.All(t => i.Tags.Contains(t)));
int[] Get_cycle_times_in_days(IEnumerable <Issue> issues) => issues.Select(x => x.CycleTime.Days).ToArray();
var frontend_feature_cts = Get_cycle_times_in_days(Filter_issues("frontend", "feature"));
var backend_bug_cts = Get_cycle_times_in_days(Filter_issues("backend", "bug"));
var backend_feature_cts = Get_cycle_times_in_days(Filter_issues("backend", "feature"));
_testOutputHelper.WriteLine($"Events found: {frontend_feature_cts.Length}, {backend_bug_cts.Length}, {backend_feature_cts.Length}");
var sut = new SoftwareDeliverySimulation();
var simulationresult = sut.SimulateIssueDeliveryByResources(N_RESOURCES,
frontend_feature_cts,
frontend_feature_cts,
frontend_feature_cts,
backend_bug_cts,
backend_feature_cts,
backend_feature_cts,
backend_feature_cts,
backend_feature_cts
);
var distribution = Statistics.Distribution(simulationresult);
var deDE = new CultureInfo("de-DE");
foreach (var x in distribution.OrderBy(o => o.value))
{
_testOutputHelper.WriteLine($"{x.value}\t{x.frequency}\t{x.probability.ToString("0.000", deDE)}\t{x.percentile.ToString("0.0", deDE)}");
}
}
public void Single_issue_single_resource()
{
var historicalCTs = new[] { 1, 2, 3 };
var randomNumbers = new Queue <int>(new[] { 2, 1, 0 });
var sut = new SoftwareDeliverySimulation(3, maxNumber => randomNumbers.Dequeue());
var result = sut.SimulateIssueDeliveryByResources(historicalCTs);
Assert.Empty(randomNumbers);
Assert.Equal(new[] { 3, 2, 1 }, result);
}
public void Two_issues_two_resources()
{
var historicalCTsA = new[] { 1, 2, 3 };
var historicalCTsB = new[] { 10, 20, 30 };
var randomNumbers = new Queue <int>(new[] { 2, 1, 0, 2, 1, 0 });
var sut = new SoftwareDeliverySimulation(3, maxNumber => randomNumbers.Dequeue());
var result = sut.SimulateIssueDeliveryByResources(2, historicalCTsA, historicalCTsB);
Assert.Empty(randomNumbers);
Assert.Equal(new[] { 20, 30, 10 }, result);
}