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, 4 insertions, 3 deletions

diff --git a/src/test/scala/chiselTests/MultiClockSpec.scala b/src/test/scala/chiselTests/MultiClockSpec.scala
index 770a9e9a..1a71570d 100644
--- a/src/test/scala/chiselTests/MultiClockSpec.scala
+++ b/src/test/scala/chiselTests/MultiClockSpec.scala
@@ -5,6 +5,7 @@ package chiselTests
 import chisel3._
 import chisel3.util.Counter
 import chisel3.testers.BasicTester
+import chisel3.stage.ChiselStage
 
 /** Multi-clock test of a Reg using a different clock via withClock */
 class ClockDividerTest extends BasicTester {
@@ -123,7 +124,7 @@ class MultiClockSpec extends ChiselFlatSpec {
   }
 
   it should "return like a normal Scala block" in {
-    elaborate(new BasicTester {
+    ChiselStage.elaborate(new BasicTester {
       assert(withClock(this.clock) { 5 } == 5)
     })
   }
@@ -137,7 +138,7 @@ class MultiClockSpec extends ChiselFlatSpec {
   }
 
   it should "return like a normal Scala block" in {
-    elaborate(new BasicTester {
+    ChiselStage.elaborate(new BasicTester {
       assert(withReset(this.reset) { 5 } == 5)
     })
   }
@@ -155,7 +156,7 @@ class MultiClockSpec extends ChiselFlatSpec {
   }
 
   "withClockAndReset" should "return like a normal Scala block" in {
-    elaborate(new BasicTester {
+    ChiselStage.elaborate(new BasicTester {
       assert(withClockAndReset(this.clock, this.reset) { 5 } == 5)
     })
   }