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, 6 insertions, 3 deletions

diff --git a/src/test/scala/chiselTests/SIntOps.scala b/src/test/scala/chiselTests/SIntOps.scala
index 9309c915..5baf52b8 100644
--- a/src/test/scala/chiselTests/SIntOps.scala
+++ b/src/test/scala/chiselTests/SIntOps.scala
@@ -3,6 +3,7 @@
 package chiselTests
 
 import chisel3._
+import chisel3.stage.ChiselStage
 import chisel3.testers.BasicTester
 
 class SIntOps extends Module {
@@ -97,14 +98,16 @@ class SIntLitExtractTester extends BasicTester {
   stop()
 }
 
-class SIntOpsSpec extends ChiselPropSpec {
+class SIntOpsSpec extends ChiselPropSpec with Utils {
 
   property("SIntOps should elaborate") {
-    elaborate { new SIntOps }
+    ChiselStage.elaborate { new SIntOps }
   }
 
   property("Negative shift amounts are invalid") {
-    a [ChiselException] should be thrownBy { elaborate(new NegativeShift(SInt())) }
+    a [ChiselException] should be thrownBy extractCause[ChiselException] {
+      ChiselStage.elaborate(new NegativeShift(SInt()))
+    }
   }
 
   ignore("SIntOpsTester should return the correct result") { }