Best Vstest code snippet using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing.TestPlatformEventSource.DiscoveryStart
DiscovererEnumerator.cs
Source:DiscovererEnumerator.cs  
...54        /// <param name="testCaseFilter"> The test case filter. </param>55        /// <param name="logger"> The logger. </param>56        internal void LoadTests(IDictionary<string, IEnumerable<string>> testExtensionSourceMap, IRunSettings settings, string testCaseFilter, IMessageLogger logger)57        {58            this.testPlatformEventSource.DiscoveryStart();59            foreach (var kvp in testExtensionSourceMap)60            {61                this.LoadTestsFromAnExtension(kvp.Key, kvp.Value, settings, testCaseFilter, logger);62            }63            this.testPlatformEventSource.DiscoveryStop(this.discoveryResultCache.TotalDiscoveredTests);64        }65        /// <summary>66        /// Loads test cases from individual source. 67        /// Discovery extensions update progress through ITestCaseDiscoverySink.68        /// Discovery extensions sends discovery messages through TestRunMessageLoggerProxy69        /// </summary>70        /// <param name="extensionAssembly"> The extension Assembly. </param>71        /// <param name="sources"> The sources.   </param>72        /// <param name="settings"> The settings.   </param>73        /// <param name="settings"> The test case filter. </param>74        /// <param name="logger"> The logger.  </param>75        [SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes",76            Justification = "This methods must invoke all possible discoverers and not fail or crash in any one.")]77        private void LoadTestsFromAnExtension(string extensionAssembly, IEnumerable<string> sources, IRunSettings settings, string testCaseFilter, IMessageLogger logger)78        {79            double totalAdaptersUsed = 0;80            // Stopwatch to collect metrics81            var timeStart = DateTime.UtcNow;82            var discovererToSourcesMap = GetDiscovererToSourcesMap(extensionAssembly, sources, logger);83            var totalAdapterLoadTIme = DateTime.UtcNow - timeStart;84            // Collecting Data Point for TimeTaken to Load Adapters85            this.requestData.MetricsCollection.Add(TelemetryDataConstants.TimeTakenToLoadAdaptersInSec, totalAdapterLoadTIme.TotalSeconds);86            // Warning is logged for in the inner function87            if (discovererToSourcesMap == null || !discovererToSourcesMap.Any())88            {89                return;90            }91            // Collecting Total Number of Adapters Discovered in Machine92            this.requestData.MetricsCollection.Add(TelemetryDataConstants.NumberOfAdapterDiscoveredDuringDiscovery, discovererToSourcesMap.Keys.Count());93            var context = new DiscoveryContext { RunSettings = settings };94            context.FilterExpressionWrapper = !string.IsNullOrEmpty(testCaseFilter) ? new FilterExpressionWrapper(testCaseFilter) : null;95            // Set on the logger the TreatAdapterErrorAsWarning setting from runsettings.96            this.SetAdapterLoggingSettings(logger, settings);97            var discoverySink = new TestCaseDiscoverySink(this.discoveryResultCache);98            double totalTimeTakenByAdapters = 0;99            foreach (var discoverer in discovererToSourcesMap.Keys)100            {101                Type discovererType = null;102                // See if discoverer can be instantiated successfully else move next.103                try104                {105                    discovererType = discoverer.Value.GetType();106                }107                catch (Exception e)108                {109                    var mesage = string.Format(110                        CultureInfo.CurrentUICulture,111                        CrossPlatEngineResources.DiscovererInstantiationException,112                        e.Message);113                    logger.SendMessage(TestMessageLevel.Warning, mesage);114                    EqtTrace.Error(e);115                    continue;116                }117                // if instantiated successfully, get tests118                try119                {120                    if (EqtTrace.IsVerboseEnabled)121                    {122                        EqtTrace.Verbose(123                            "DiscoveryContext.LoadTests: Loading tests for {0}",124                            discoverer.Value.GetType().FullName);125                    }126                    var currentTotalTests = this.discoveryResultCache.TotalDiscoveredTests;127                    var newTimeStart = DateTime.UtcNow;128                    this.testPlatformEventSource.AdapterDiscoveryStart(discoverer.Metadata.DefaultExecutorUri.AbsoluteUri);129                    discoverer.Value.DiscoverTests(discovererToSourcesMap[discoverer], context, logger, discoverySink);130                    var totalAdapterRunTime = DateTime.UtcNow - newTimeStart;131                    this.testPlatformEventSource.AdapterDiscoveryStop(this.discoveryResultCache.TotalDiscoveredTests - currentTotalTests);132                    // Collecting Total Tests Discovered By each Adapter.133                    if (this.discoveryResultCache.TotalDiscoveredTests > currentTotalTests)134                    {135                        var totalDiscoveredTests = this.discoveryResultCache.TotalDiscoveredTests - currentTotalTests;136                        this.requestData.MetricsCollection.Add(string.Format("{0}.{1}", TelemetryDataConstants.TotalTestsByAdapter, discoverer.Metadata.DefaultExecutorUri), totalDiscoveredTests);137                        totalAdaptersUsed++;138                    }139                    if (EqtTrace.IsVerboseEnabled)140                    {141                        EqtTrace.Verbose(142                            "DiscoveryContext.LoadTests: Done loading tests for {0}",...TestPlatformEventSource.cs
Source:TestPlatformEventSource.cs  
...103        {104            this.WriteEvent(TestPlatformInstrumentationEvents.AdapterExecutionStopEventId, numberOfTests);105        }106        /// <inheritdoc/>107        [Event(TestPlatformInstrumentationEvents.AdapterDiscoveryStartEventId)]108        public void AdapterDiscoveryStart(string executorUri)109        {110            this.WriteEvent(TestPlatformInstrumentationEvents.AdapterDiscoveryStartEventId, executorUri);111        }112        /// <inheritdoc/>113        [Event(TestPlatformInstrumentationEvents.AdapterDiscoveryStopEventId)]114        public void AdapterDiscoveryStop(long numberOfTests)115        {116            this.WriteEvent(TestPlatformInstrumentationEvents.AdapterDiscoveryStopEventId, numberOfTests);117        }118        /// <inheritdoc/>119        [Event(TestPlatformInstrumentationEvents.DiscoveryStartEventId)]120        public void DiscoveryStart()121        {122            this.WriteEvent(TestPlatformInstrumentationEvents.DiscoveryStartEventId);123        }124        /// <inheritdoc/>125        [Event(TestPlatformInstrumentationEvents.DiscoveryStopEventId)]126        public void DiscoveryStop(long numberOfTests)127        {128            this.WriteEvent(TestPlatformInstrumentationEvents.DiscoveryStopEventId, numberOfTests);129        }130        /// <inheritdoc/>131        [Event(TestPlatformInstrumentationEvents.ExecutionStartEventId)]132        public void ExecutionStart()133        {134            this.WriteEvent(TestPlatformInstrumentationEvents.ExecutionStartEventId);135        }136        /// <inheritdoc/>137        [Event(TestPlatformInstrumentationEvents.ExecutionStopEventId)]138        public void ExecutionStop(long numberOfTests)139        {140            this.WriteEvent(TestPlatformInstrumentationEvents.ExecutionStopEventId, numberOfTests);141        }142        /// <inheritdoc/>143        [Event(TestPlatformInstrumentationEvents.DataCollectionStartEventId)]144        public void DataCollectionStart(string dataCollectorUri)145        {146            this.WriteEvent(TestPlatformInstrumentationEvents.DataCollectionStartEventId, dataCollectorUri);147        }148        /// <inheritdoc/>149        [Event(TestPlatformInstrumentationEvents.DataCollectionStopEventId)]150        public void DataCollectionStop()151        {152            this.WriteEvent(TestPlatformInstrumentationEvents.DataCollectionStopEventId);153        }154        /// <inheritdoc/>155        [Event(TestPlatformInstrumentationEvents.TranslationLayerInitializeStartEventId)]156        public void TranslationLayerInitializeStart()157        {158            this.WriteEvent(TestPlatformInstrumentationEvents.TranslationLayerInitializeStartEventId);159        }160        /// <inheritdoc/>161        [Event(TestPlatformInstrumentationEvents.TranslationLayerInitializeStopEventId)]162        public void TranslationLayerInitializeStop()163        {164            this.WriteEvent(TestPlatformInstrumentationEvents.TranslationLayerInitializeStopEventId);165        }166        /// <inheritdoc/>167        [Event(TestPlatformInstrumentationEvents.TranslationLayerDiscoveryStartEventId)]168        public void TranslationLayerDiscoveryStart()169        {170            this.WriteEvent(TestPlatformInstrumentationEvents.TranslationLayerDiscoveryStartEventId);171        }172        /// <inheritdoc/>173        [Event(TestPlatformInstrumentationEvents.TranslationLayerDiscoveryStopEventId)]174        public void TranslationLayerDiscoveryStop()175        {176            this.WriteEvent(TestPlatformInstrumentationEvents.TranslationLayerDiscoveryStopEventId);177        }178        /// <inheritdoc/>179        [Event(TestPlatformInstrumentationEvents.TranslationLayerExecutionStartEventId)]180        public void TranslationLayerExecutionStart(long customTestHost, long sourcesCount, long testCasesCount, string runSettings)181        {182            this.WriteEvent(183                TestPlatformInstrumentationEvents.TranslationLayerExecutionStartEventId,184                customTestHost,...DiscoveryStart
Using AI Code Generation
1using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;2TestPlatformEventSource.Instance.DiscoveryStart();3using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;4TestPlatformEventSource.Instance.DiscoveryStart();5using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;6TestPlatformEventSource.Instance.DiscoveryStart();7using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;8TestPlatformEventSource.Instance.DiscoveryStart();9using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;10TestPlatformEventSource.Instance.DiscoveryStart();11using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;12TestPlatformEventSource.Instance.DiscoveryStart();13using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;14TestPlatformEventSource.Instance.DiscoveryStart();15using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;16TestPlatformEventSource.Instance.DiscoveryStart();17using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;18TestPlatformEventSource.Instance.DiscoveryStart();19using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;20TestPlatformEventSource.Instance.DiscoveryStart();21using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;DiscoveryStart
Using AI Code Generation
1using System;2{3    {4        static void Main(string[] args)5        {6            Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing.TestPlatformEventSource.Instance.DiscoveryStart();7        }8    }9}10using System;11{12    {13        static void Main(string[] args)14        {15            Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing.TestPlatformEventSource.Instance.DiscoveryStart();16        }17    }18}19using System;20{21    {22        static void Main(string[] args)23        {24            Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing.TestPlatformEventSource.Instance.DiscoveryStart();25        }26    }27}28using System;29{30    {31        static void Main(string[] args)32        {33            Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing.TestPlatformEventSource.Instance.DiscoveryStart();34        }35    }36}37using System;38{39    {40        static void Main(string[] args)41        {42            Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing.TestPlatformEventSource.Instance.DiscoveryStart();43        }44    }45}46using System;47{48    {49        static void Main(string[] args)50        {51            Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing.TestPlatformEventSource.Instance.DiscoveryStart();52        }53    }54}55using System;56{57    {58        static void Main(string[] args)59        {DiscoveryStart
Using AI Code Generation
1using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;2using System;3using System.Diagnostics.Tracing;4{5    {6        static void Main(string[] args)7        {8            EventSource eventSource = TestPlatformEventSource.Instance;9            EventListener eventListener = new EventListener();10            eventListener.EnableEvents(eventSource, EventLevel.LogAlways, (EventKeywords)0x0000000000000001);11            TestPlatformEventSource.Instance.DiscoveryStart();12            Console.ReadLine();13        }14    }15}16using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;17using System;18using System.Diagnostics.Tracing;19{20    {21        static void Main(string[] args)22        {23            EventSource eventSource = TestPlatformEventSource.Instance;24            EventListener eventListener = new EventListener();25            eventListener.EnableEvents(eventSource, EventLevel.LogAlways, (EventKeywords)0x0000000000000001);26            TestPlatformEventSource.Instance.DiscoveryStart();27            Console.ReadLine();28        }29    }30}31using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;32using System;33using System.Diagnostics.Tracing;34{35    {36        static void Main(string[] args)37        {38            EventSource eventSource = TestPlatformEventSource.Instance;39            EventListener eventListener = new EventListener();40            eventListener.EnableEvents(eventSource, EventLevel.LogAlways, (EventKeywords)0x0000000000000001);41            TestPlatformEventSource.Instance.DiscoveryStart();42            Console.ReadLine();43        }44    }45}46using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;47using System;48using System.Diagnostics.Tracing;49{50    {51        static void Main(string[] args)52        {53            EventSource eventSource = TestPlatformEventSource.Instance;54            EventListener eventListener = new EventListener();55            eventListener.EnableEvents(eventSource, EventLevel.LogAlways, (EventKeywords)0x0000000000000001);DiscoveryStart
Using AI Code Generation
1using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;2{3    {4        static void Main(string[] args)5        {6            TestPlatformEventSource.Instance.DiscoveryStart();7        }8    }9}10using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;11{12    {13        static void Main(string[] args)14        {15            TestPlatformEventSource.Instance.DiscoveryStart();16        }17    }18}19using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;20{21    {22        static void Main(string[] args)23        {24            TestPlatformEventSource.Instance.DiscoveryStart();25        }26    }27}28using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;29{30    {31        static void Main(string[] args)32        {33            TestPlatformEventSource.Instance.DiscoveryStart();34        }35    }36}37using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;38{39    {40        static void Main(string[] args)41        {42            TestPlatformEventSource.Instance.DiscoveryStart();43        }44    }45}46using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;47{48    {49        static void Main(string[] args)50        {51            TestPlatformEventSource.Instance.DiscoveryStart();52        }53    }54}55using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;56{DiscoveryStart
Using AI Code Generation
1using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;2TestPlatformEventSource.Instance.DiscoveryStart();3using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;4TestPlatformEventSource.Instance.DiscoveryStop();5using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;6TestPlatformEventSource.Instance.ExecutionStart();7using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;8TestPlatformEventSource.Instance.ExecutionStop();9using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;10TestPlatformEventSource.Instance.TestSessionStart();11using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;12TestPlatformEventSource.Instance.TestSessionStop();13using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;14TestPlatformEventSource.Instance.TestSessionAbort();15using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;16TestPlatformEventSource.Instance.TestSessionPause();17using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;18TestPlatformEventSource.Instance.TestSessionResume();19        {20            TestPlatformEventSource.Instance.DiscoveryStart();21        }22    }23}24using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;25{26    {27        static void Main(string[] args)28        {29            TestPlatformEventSource.Instance.DiscoveryStart();30        }31    }32}33using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;34{DiscoveryStart
Using AI Code Generation
1using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;2{3    {4        static void Main(string[] args)5        {6            TestPlatformEventSource.Instance.DiscoveryStart();7        }8    }9}10using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;11{12    {13        static void Main(string[] args)14        {15            TestPlatformEventSource.Instance.DiscoveryStart();16        }17    }18}19using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;20{21    {22        static void Main(string[] args)23        {24            TestPlatformEventSource.Instance.DiscoveryStart();25        }26    }27}28using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;29{30    {31        static void Main(string[] args)32        {33            TestPlatformEventSource.Instance.DiscoveryStart();34        }35    }36}37using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;38{39    {40        static void Main(string[] args)41        {42            TestPlatformEventSource.Instance.DiscoveryStart();43        }44    }45}46using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;47{48    {49        static void Main(string[] args)50        {51            TestPlatformEventSource.Instance.DiscoveryStart();52        }53    }54}55using Microsoft.VisualStudio.TestPlatform.CoreUtilities.Tracing;56{Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Get 100 minutes of automation test minutes FREE!!
