Test Discoverer

using Microsoft.VisualStudio.TestPlatform.ObjectModel;
using Microsoft.VisualStudio.TestPlatform.ObjectModel.Adapter;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace TSTestAdapter
{
    [DefaultExecutorUri(TSTestExecutor.ExecutorUriString)]
    [FileExtension(".ts")]
    //[FileExtension(".test.ts")]
    public class TSTestDiscoverer : ITestDiscoverer
    {
        public void DiscoverTests(IEnumerable<string> sources
            , IDiscoveryContext discoveryContext
            , Microsoft.VisualStudio.TestPlatform.ObjectModel.Logging.IMessageLogger logger
            , ITestCaseDiscoverySink discoverySink)
        {
            GetTests(sources, discoverySink);
        }

        public static IEnumerable<TestCase> GetTests(IEnumerable<string> sourceFiles, ITestCaseDiscoverySink discoverySink)
        {
            var tests = new List<TestCase>();

            Parallel.ForEach(sourceFiles, s =>
            {
                var sourceCode = File.ReadAllText(s);

                var matches = Regex.Matches(sourceCode, @"^\s*test\s*\(\s*""(?<TestName>.*?)""\s*,?", RegexOptions.Multiline);
                foreach (Match m in matches)
                {
                    var testName = m.Groups["TestName"].Value;
                    var testCase = new TestCase(testName, TSTestExecutor.ExecutorUri, s);
                    if (discoverySink != null)
                    {
                        discoverySink.SendTestCase(testCase);
                    }
                    tests.Add(testCase);
                }
            });

            return tests;
        }
    }
}