Fix InProcessBenchmarkEmitsSameIL tests.

Author: timcassell

src/BenchmarkDotNet/Running/BuildPartition.cs

@@ -21,7 +21,7 @@ public class BuildPartition
     {
         // We use an auto-increment global counter instead of Guid to guarantee uniqueness per benchmark run (Guid has a small chance to collide),
         // assuming there are fewer than 4 billion build partitions (a safe assumption).
-        private static int s_partitionCounter;
+        internal static int s_partitionCounter;
 
         public BuildPartition(BenchmarkBuildInfo[] benchmarks, IResolver resolver)
         {

tests/BenchmarkDotNet.IntegrationTests/InProcessEmitTest.cs

@@ -10,6 +10,7 @@
 using BenchmarkDotNet.Jobs;
 using BenchmarkDotNet.Loggers;
 using BenchmarkDotNet.Reports;
+using BenchmarkDotNet.Running;
 using BenchmarkDotNet.Tests.Loggers;
 using BenchmarkDotNet.Tests.XUnit;
 using BenchmarkDotNet.Toolchains.InProcess.Emit;
@@ -68,10 +69,10 @@ private void DiffEmit(Summary summary)
             if (!Portability.RuntimeInformation.IsFullFramework)
                 return;
 
-            var caseName = summary.BenchmarksCases.First().Job.ToString();
+            var caseName = $"{typeof(InProcessEmitTest).Assembly.GetName().Name}-{summary.BenchmarksCases.First().Job}";
             NaiveRunnableEmitDiff.RunDiff(
-                $@"{caseName}.exe",
-                $@"{caseName}Emitted.dll",
+                $@"{caseName}-{BuildPartition.s_partitionCounter}.exe",
+                $@"{caseName}-{BuildPartition.s_partitionCounter - 1}Emitted.dll",
                 ConsoleLogger.Default);
         }