test: retrieve raw stdout in example tests, rather than lines

src/test/wacc/examples.scala

@@ -6,6 +6,7 @@ import org.scalatest.Inspectors.forEvery
 import java.io.File
 import sys.process._
 import java.io.PrintStream
+import scala.io.Source
 
 class ParallelExamplesSpec extends AnyFlatSpec with BeforeAndAfterAll with ParallelTestExecution {
   val files =
@@ -47,7 +48,7 @@ class ParallelExamplesSpec extends AnyFlatSpec with BeforeAndAfterAll with Paral
             .drop(outputLineIdx + 1)
             .takeWhile(_.startsWith("#"))
             .map(_.stripPrefix("#").stripLeading)
-            .mkString("")
+            .mkString("\n")
 
       val exitLineIdx = contents.indexWhere(_.matches("^# ?[Ee]xit:.*$"))
       val expectedExit =
@@ -62,11 +63,16 @@ class ParallelExamplesSpec extends AnyFlatSpec with BeforeAndAfterAll with Paral
 
       // Run the executable with the provided input
       val stdout = new StringBuilder
-      // val execResult = s"$execFilename".!(ProcessLogger(stdout.append(_)))
-      val execResult =
-        s"echo $inputLine" #| s"timeout 5s $execFilename" ! ProcessLogger(stdout.append(_))
+      val process = s"timeout 5s $execFilename" run ProcessIO(
+        in = w => {
+          w.write(inputLine.getBytes)
+          w.close()
+        },
+        out = Source.fromInputStream(_).addString(stdout),
+        err = _ => ()
+      )
 
-      assert(execResult == expectedExit)
+      assert(process.exitValue == expectedExit)
       assert(stdout.toString == expectedOutput)
     }
   }