Fix #3746: Scripted should fail when no tests match the pattern

internal/util-scripted/src/main/scala/sbt/internal/scripted/ScriptedTests.scala

@@ -33,6 +33,9 @@ object ScriptedRunnerImpl {
       case ScriptedTest(group, name) =>
         runner.scriptedTest(group, name, logger, context)
     }
+    if (tests.nonEmpty && allTests.isEmpty) {
+      sys.error(s"No tests found matching: ${tests.mkString(", ")}")
+    }
     runAll(allTests)
   }
   def runAll(tests: Seq[() => Option[String]]): Unit = {

project/Scripted.scala

@@ -104,7 +104,7 @@ object Scripted {
       launcherJar: File,
       logger: Logger
   ): Unit = {
-    logger.info(s"About to run tests: ${args.mkString("\n * ", "\n * ", "\n")}")
+    logger.info(s"Tests selected: ${args.mkString("\n * ", "\n * ", "\n")}")
     logger.info("")
 
     // Force Log4J to not use a thread context classloader otherwise it throws a CCE

scripted-sbt/src/main/scala/sbt/scriptedtest/ScriptedTests.scala

@@ -589,6 +589,10 @@ class ScriptedRunner {
     val groupCount = if (parallelExecution) instances else Int.MaxValue
     val scriptedRunners =
       runner.batchScriptedRunner(scriptedTests, addTestFile, groupCount, prop, logger)
+    // Fail if user provided test patterns but none matched any existing test directories
+    if (tests.nonEmpty && scriptedRunners.isEmpty) {
+      sys.error(s"No tests found matching: ${tests.mkString(", ")}")
+    }
     if (parallelExecution && instances > 1) {
       import scala.collection.parallel.CollectionConverters.*
       val parallelRunners = scriptedRunners.toArray.par