Use ChiselStage in Tests

This migrates the tests to Chisel 3.4/FIRRTL 1.4. This primarily
involves removing usages of deprecated methods including:

- Remove usages of Driver
- Use ChiselStage methods instead of BackendCompilationUtilities
  methods
- Use Dependency API for custom transforms
- Use extractCause to unpack StackError

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

1 files changed, 11 insertions, 6 deletions

diff --git a/src/test/scala/chiselTests/BoringUtilsSpec.scala b/src/test/scala/chiselTests/BoringUtilsSpec.scala
index 755ba60b..997466c0 100644
--- a/src/test/scala/chiselTests/BoringUtilsSpec.scala
+++ b/src/test/scala/chiselTests/BoringUtilsSpec.scala
@@ -8,10 +8,12 @@ import chisel3.testers.BasicTester
 import chisel3.experimental.{BaseModule, ChiselAnnotation, RunFirrtlTransform}
 import chisel3.util.experimental.BoringUtils
 
-import firrtl.{CircuitForm, CircuitState, ChirrtlForm, Transform}
+import firrtl.{CircuitForm, CircuitState, ChirrtlForm, DependencyAPIMigration, Transform}
 import firrtl.annotations.{Annotation, NoTargetAnnotation}
+import firrtl.options.Dependency
 import firrtl.transforms.{DontTouchAnnotation, NoDedupAnnotation}
-import firrtl.passes.wiring.WiringException
+import firrtl.passes.wiring.{WiringException, WiringTransform}
+import firrtl.stage.Forms
 
 abstract class ShouldntAssertTester(cyclesToWait: BigInt = 4) extends BasicTester {
   val dut: BaseModule
@@ -19,11 +21,14 @@ abstract class ShouldntAssertTester(cyclesToWait: BigInt = 4) extends BasicTeste
   when (done) { stop() }
 }
 
-class StripNoDedupAnnotation extends Transform {
-  def inputForm: CircuitForm = ChirrtlForm
-  def outputForm: CircuitForm = ChirrtlForm
-  def execute(state: CircuitState): CircuitState =
+class StripNoDedupAnnotation extends Transform with DependencyAPIMigration {
+  override def prerequisites = Forms.ChirrtlForm
+  override def optionalPrerequisites = Seq.empty
+  override def optionalPrerequisiteOf = Dependency[WiringTransform] +: Forms.ChirrtlEmitters
+  override def invalidates(a: Transform) = false
+  def execute(state: CircuitState): CircuitState = {
     state.copy(annotations = state.annotations.filter{ case _: NoDedupAnnotation => false; case _ => true })
+  }
 }
 
 class BoringUtilsSpec extends ChiselFlatSpec with ChiselRunners {