Add test filtering by class or method name (dotnet#5687)

test.sh|ps1 -methodfilter "Namespace.ClassName.MethodName" 
test.sh|ps1 -classfilter "Namespace.ClassName"

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Max Charlamb <44248479+max-charlamb@users.noreply.github.com>

Author: 3 people

eng/build.ps1

@@ -12,6 +12,8 @@ Param(
     [switch] $skipnative,
     [switch] $bundletools,
     [switch] $useCdac,
+    [string] $methodfilter = '',
+    [string] $classfilter = '',
     [ValidatePattern("(default|\d+\.\d+.\d+(-[a-z0-9\.]+)?)")][string] $dotnetruntimeversion = 'default',
     [ValidatePattern("(default|\d+\.\d+.\d+(-[a-z0-9\.]+)?)")][string] $dotnetruntimedownloadversion= 'default',
     [string] $runtimesourcefeed = '',
@@ -98,6 +100,17 @@ if ($test) {
         if ($useCdac) {
             $env:SOS_TEST_CDAC="true"
         }
+
+        # Build the test filter argument if provided
+        # Use backslash-escaped quotes so they survive the additional quoting in tools.ps1
+        $testFilterArg = ''
+        if ($methodfilter -ne '') {
+            $testFilterArg = "/p:TestRunnerAdditionalArguments=\`"-method $methodfilter\`""
+        }
+        elseif ($classfilter -ne '') {
+            $testFilterArg = "/p:TestRunnerAdditionalArguments=\`"-class $classfilter\`""
+        }
+
         & "$engroot\common\build.ps1" `
           -test `
           -configuration $configuration `
@@ -111,7 +124,8 @@ if ($test) {
           /p:DotnetRuntimeDownloadVersion="$dotnetruntimedownloadversion" `
           /p:RuntimeSourceFeed="$runtimesourcefeed" `
           /p:RuntimeSourceFeedKey="$runtimesourcefeedkey" `
-          /p:LiveRuntimeDir="$liveRuntimeDir" 
+          /p:LiveRuntimeDir="$liveRuntimeDir" `
+          $testFilterArg
 
         if ($lastExitCode -ne 0) {
             exit $lastExitCode

eng/build.sh

@@ -29,13 +29,16 @@ __SkipGenerateVersion=0
 __InstallRuntimes=0
 __PrivateBuild=0
 __Test=0
+__TestFilter=
 __UnprocessedBuildArgs=
 __UseCdac=0
 __LiveRuntimeDir=
 
 usage_list+=("-skipmanaged: do not build managed components.")
 usage_list+=("-skipnative: do not build native components.")
 usage_list+=("-test: run xunit tests")
+usage_list+=("-methodfilter: pass method filter to xunit runner (Namespace.ClassName.MethodName)")
+usage_list+=("-classfilter: pass class filter to xunit runner (Namespace.ClassName)")
 
 handle_arguments() {
     lowerI="$(echo "${1/--/-}" | tr "[:upper:]" "[:lower:]")"
@@ -105,6 +108,16 @@ handle_arguments() {
             __Test=1
             ;;
 
+        methodfilter|-methodfilter)
+            __TestFilter="-method $2"
+            __ShiftArgs=1
+            ;;
+        
+        classfilter|-classfilter)
+            __TestFilter="-class $2"
+            __ShiftArgs=1
+            ;;
+
         usecdac|-usecdac)
             __UseCdac=1
             ;;
@@ -302,6 +315,12 @@ if [[ "$__Test" == 1 ]]; then
           export SOS_TEST_CDAC="true"
       fi
 
+      # Build the test filter argument if provided
+      __TestFilterArg=
+      if [[ -n "$__TestFilter" ]]; then
+          __TestFilterArg="/p:TestRunnerAdditionalArguments=\"$__TestFilter\""
+      fi
+
       # __CommonMSBuildArgs contains TargetOS property
       "$__RepoRootDir/eng/common/build.sh" \
         --test \
@@ -314,6 +333,7 @@ if [[ "$__Test" == 1 ]]; then
         /p:RuntimeSourceFeed="$__RuntimeSourceFeed" \
         /p:RuntimeSourceFeedKey="$__RuntimeSourceFeedKey" \
         /p:LiveRuntimeDir="$__LiveRuntimeDir" \
+        "$__TestFilterArg" \
         $__CommonMSBuildArgs
 
       if [ $? != 0 ]; then