"Scope" test resource (top.cpp).

src/test/scala/firrtlTests/FirrtlSpec.scala

@@ -16,7 +16,9 @@ import firrtl.annotations
 import firrtl.util.BackendCompilationUtilities
 
 trait FirrtlRunners extends BackendCompilationUtilities {
-  lazy val cppHarness = new File(s"/top.cpp")
+
+  val cppHarnessResourceName: String = "/firrtl/testTop.cpp"
+
   /** Compiles input Firrtl to Verilog */
   def compileToVerilog(input: String, annotations: AnnotationMap = AnnotationMap(Seq.empty)): String = {
     val circuit = Parser.parse(input.split("\n").toIterator)
@@ -64,7 +66,7 @@ trait FirrtlRunners extends BackendCompilationUtilities {
       annotations: AnnotationMap = new AnnotationMap(Seq.empty)) = {
     val testDir = compileFirrtlTest(prefix, srcDir, customTransforms, annotations)
     val harness = new File(testDir, s"top.cpp")
-    copyResourceToFile(cppHarness.toString, harness)
+    copyResourceToFile(cppHarnessResourceName, harness)
 
     // Note file copying side effect
     val verilogFiles = verilogPrefixes map { vprefix =>

src/test/scala/firrtlTests/IntegrationSpec.scala

@@ -37,8 +37,8 @@ class GCDSplitEmissionExecutionTest extends FirrtlFlatSpec {
     topFile should exist
 
     // Copy harness over
-    val harness = new File(testDir, s"top.cpp")
-    copyResourceToFile(cppHarness.toString, harness)
+    val harness = new File(testDir, s"testTop.cpp")
+    copyResourceToFile(cppHarnessResourceName, harness)
 
     // topFile will be compiled by Verilator command by default but we need to also include dutFile
     verilogToCpp(top, testDir, Seq(dutFile), harness).!

src/test/scala/firrtlTests/StringSpec.scala

@@ -18,7 +18,7 @@ class PrintfSpec extends FirrtlPropSpec {
     val prefix = "Printf"
     val testDir = compileFirrtlTest(prefix, "/features")
     val harness = new File(testDir, s"top.cpp")
-    copyResourceToFile(cppHarness.toString, harness)
+    copyResourceToFile(cppHarnessResourceName, harness)
 
     verilogToCpp(prefix, testDir, Seq(), harness).!
     cppToExe(prefix, testDir).!