Add .runsettings file to be able to run and debug tests on vscode in codespace with prebuilt (#61684)

Author: safern

.devcontainer/devcontainer.json

@@ -12,7 +12,11 @@
 
 	"settings": {
 		// Loading projects on demand is better for larger codebases
-		"omnisharp.enableMsBuildLoadProjectsOnDemand": true
+		"omnisharp.enableMsBuildLoadProjectsOnDemand": true,
+		"omnisharp.enableRoslynAnalyzers": true,
+		"omnisharp.enableEditorConfigSupport": true,
+		"omnisharp.enableAsyncCompletion": true,
+		"omnisharp.testRunSettings": "${containerWorkspaceFolder}/artifacts/obj/vscode/.runsettings"
 	},
 
 	// Add the IDs of extensions you want installed when the container is created.

.devcontainer/scripts/onCreateCommand.sh

@@ -4,6 +4,8 @@ set -e
 
 # prebuild the repo, so it is ready for development
 ./build.sh libs+clr -rc Release
+# restore libs tests so that the project is ready to be loaded by OmniSharp
+./build.sh libs.tests -restore
 
 # save the commit hash of the currently built assemblies, so developers know which version was built
 git rev-parse HEAD > ./artifacts/prebuild.sha

eng/testing/runsettings.targets

@@ -7,6 +7,7 @@
     <CreateIntermediateRunSettingsFile Condition="'$(CreateIntermediateRunSettingsFile)' == ''">false</CreateIntermediateRunSettingsFile>
     <RunSettingsOutputFilePath Condition="'$(CreateIntermediateRunSettingsFile)' == 'true'">$(RunSettingsIntermediateOutputFilePath)</RunSettingsOutputFilePath>
     <RunSettingsOutputFilePath Condition="'$(CreateIntermediateRunSettingsFile)' != 'true'">$(RunSettingsAppOutputFilePath)</RunSettingsOutputFilePath>
+    <VsCodeRunSettingsOutputFilePath>$(ArtifactsObjDir)vscode/.runsettings</VsCodeRunSettingsOutputFilePath>
 
     <!-- Set RunSettingsFilePath property which is read by VSTest. -->
     <RunSettingsFilePath Condition="Exists('$(RunSettingsAppOutputFilePath)')">$(RunSettingsAppOutputFilePath)</RunSettingsFilePath>
@@ -46,6 +47,12 @@
                       WriteOnlyWhenDifferent="true"
                       Overwrite="true" />
 
+    <WriteLinesToFile File="$(VsCodeRunSettingsOutputFilePath)"
+                      Lines="$(RunSettingsFileContent)"
+                      WriteOnlyWhenDifferent="true"
+                      Overwrite="true"
+                      Condition="'$(CreateVsCodeRunSettingsFile)' == 'true'" />
+    
     <!-- Set RunSettingsFilePath property which is read by VSTest. -->
     <PropertyGroup>
       <RunSettingsFilePath>$(RunSettingsOutputFilePath)</RunSettingsFilePath>

src/libraries/pretest.proj

@@ -5,6 +5,7 @@
     <!-- Create an intermediate runsettings file to enable VSTest discovery. -->
     <EnableRunSettingsSupport>true</EnableRunSettingsSupport>
     <CreateIntermediateRunSettingsFile>true</CreateIntermediateRunSettingsFile>
+    <CreateVsCodeRunSettingsFile>true</CreateVsCodeRunSettingsFile>
   </PropertyGroup>
 
   <PropertyGroup>