Update runtime metrics tests to avoid failures on some platforms (dot…

…net#105300)

* Update runtime metrics tests to avoid failures on some platforms

* Fix incorrect assertion in last commit

* Skip CPU time on mobile

* Skip test on Mobile platforms

---------

Co-authored-by: Tarek Mahmoud Sayed <tarekms@microsoft.com>

src/libraries/System.Diagnostics.DiagnosticSource/tests/RuntimeMetricsTests.cs

@@ -4,6 +4,7 @@
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
+using System.Runtime;
 using System.Threading;
 using Xunit;
 using Xunit.Abstractions;
@@ -17,6 +18,9 @@ public class RuntimeMetricsTests(ITestOutputHelper output)
 
         private static readonly string[] s_genNames = ["gen0", "gen1", "gen2", "loh", "poh"];
 
+        // On some platforms and AoT scenarios, the JIT may not be in use. Some assertions will consider zero as a valid in such cases.
+        private static bool s_jitHasRun = JitInfo.GetCompiledMethodCount() > 0;
+
         private static readonly Func<bool> s_forceGc = () =>
         {
             for (var gen = 0; gen <= GC.MaxGeneration; gen++)
@@ -69,7 +73,7 @@ public void GcCollectionsCount()
             Assert.True(measurements.Count >= gensExpected, $"Expected to find at least one measurement for each generation ({gensExpected}) " +
                 $"but received {measurements.Count} measurements.");
 
-            foreach (Measurement<long> measurement in measurements.Where(m => m.Value >= 1))
+            foreach (Measurement<long> measurement in measurements)
             {
                 var tags = measurement.Tags.ToArray();
                 var tag = tags.SingleOrDefault(k => k.Key == "gc.heap.generation");
@@ -112,7 +116,7 @@ public void GcCollectionsCount()
             }
         }
 
-        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotBrowser))]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotMobile))]
         public void CpuTime()
         {
            using InstrumentRecorder<double> instrumentRecorder = new("dotnet.process.cpu.time");
@@ -121,7 +125,7 @@ public void CpuTime()
 
            bool[] foundCpuModes = [false, false];
 
-           foreach (Measurement<double> measurement in instrumentRecorder.GetMeasurements().Where(m => m.Value >= 0))
+           foreach (Measurement<double> measurement in instrumentRecorder.GetMeasurements())
            {
                var tags = measurement.Tags.ToArray();
                var tag = tags.SingleOrDefault(k => k.Key == "cpu.mode");
@@ -220,26 +224,26 @@ static void AssertExceptions(IReadOnlyList<Measurement<long>> measurements, int
             }
         }
 
-        public static IEnumerable<object[]> LongMeasurements => new List<object[]>
+        public static IEnumerable<object[]> Measurements => new List<object[]>
         {
             new object[] { "dotnet.process.memory.working_set", s_longGreaterThanZero, null },
             new object[] { "dotnet.assembly.count", s_longGreaterThanZero, null },
             new object[] { "dotnet.process.cpu.count", s_longGreaterThanZero, null },
             new object[] { "dotnet.gc.heap.total_allocated", s_longGreaterThanZero, null },
             new object[] { "dotnet.gc.last_collection.memory.committed_size", s_longGreaterThanZero, s_forceGc },
             new object[] { "dotnet.gc.pause.time", s_doubleGreaterThanOrEqualToZero, s_forceGc }, // may be zero if no GC has occurred
-            new object[] { "dotnet.jit.compiled_il.size", s_longGreaterThanZero, null },
-            new object[] { "dotnet.jit.compiled_methods", s_longGreaterThanZero, null },
-            new object[] { "dotnet.jit.compilation.time", s_doubleGreaterThanZero, null },
+            new object[] { "dotnet.jit.compiled_il.size", s_jitHasRun ? s_longGreaterThanZero : s_longGreaterThanOrEqualToZero, null },
+            new object[] { "dotnet.jit.compiled_methods", s_jitHasRun ? s_longGreaterThanZero : s_longGreaterThanOrEqualToZero, null },
+            new object[] { "dotnet.jit.compilation.time", s_jitHasRun ? s_doubleGreaterThanZero : s_doubleGreaterThanOrEqualToZero, null },
             new object[] { "dotnet.monitor.lock_contentions", s_longGreaterThanOrEqualToZero, null },
             new object[] { "dotnet.thread_pool.thread.count", s_longGreaterThanZero, null },
             new object[] { "dotnet.thread_pool.work_item.count", s_longGreaterThanOrEqualToZero, null },
             new object[] { "dotnet.thread_pool.queue.length", s_longGreaterThanOrEqualToZero, null },
             new object[] { "dotnet.timer.count", s_longGreaterThanOrEqualToZero, null },
         };
 
-        [ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.IsNotBrowser))]
-        [MemberData(nameof(LongMeasurements))]
+        [ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.IsNotMobile))]
+        [MemberData(nameof(Measurements))]
         public void ValidateMeasurements<T>(string metricName, Func<T, (bool, string?)>? valueAssertion, Func<bool>? beforeRecord)
             where T : struct
         {