Fetch test results from Jenkins

gistfile1.txt

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Linq;

namespace JenkinsFailedTestsTable
{
	class MainClass
	{
		static HttpClient http = new HttpClient();
		const string jenkinsUrl = "https://jenkins.mono-project.com/job/test-mono-mainline";

		public static void Main(string[] args)
		{
			var labels = new[] { "debian-amd64","debian-armel", "debian-armhf", "debian-i386", "osx-i386" };
			var history = DateTime.Now.AddDays(-5);
			var timestamp = (long)(history - new DateTime(1970, 1, 1)).TotalMilliseconds;

			var sw = Stopwatch.StartNew();
			foreach (var label in labels)
			{
				Console.WriteLine($"Failed tests on {label} since {history.Year}-{history.Month:D2}-{history.Day:D2}");
				Console.WriteLine("---------------------------------------------");
				Console.WriteLine();

				var failedTests = GetFailedTests(label, timestamp).Result;

				var groupedTests = from test in failedTests
								   group test by test into g
								   let count = g.Count()
								   orderby count descending
								   select new { TestName = g.Key, Count = count };

				foreach (var entry in groupedTests)
					Console.WriteLine($"{entry.Count, 3}   {entry.TestName}");
			}

			Console.WriteLine();
			Console.WriteLine("Data retrieval took " + sw.Elapsed);
			Console.ReadLine();
		}

		public async static Task<List<string>> GetFailedTests(string label, long timestamp)
		{
			var failedTest = new List<string>();
			var xdoc = new XmlDocument();

			var builds = await http.GetStringAsync($"{jenkinsUrl}/label={label}/api/xml?xpath=//build[result=%27UNSTABLE%27%20and%20timestamp%3E{timestamp}]&depth=1&wrapper=builds&tree=builds[id,result,timestamp]");
			xdoc.LoadXml(builds);

			foreach (XmlNode build in xdoc.FirstChild.ChildNodes)
			{
				var id = build["id"].InnerText;
				var tests = await http.GetStringAsync($"{jenkinsUrl}/label={label}/{id}/testReport/api/xml?tree=suites[cases[className,name,status]]&xpath=//case[status=%27REGRESSION%27]|//case[status=%27FAILED%27]&wrapper=testResult");

				xdoc.LoadXml(tests);

				foreach (XmlNode cas in xdoc.FirstChild.ChildNodes)
				{
					failedTest.Add(cas["className"].InnerText + "." + cas["name"].InnerText);
				}
			}

			failedTest.Sort();
			return failedTest;
		}
	}
}