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, 5 insertions, 2 deletions

diff --git a/src/test/scala/chiselTests/FixedPointSpec.scala b/src/test/scala/chiselTests/FixedPointSpec.scala
index 7d6ec6a3..c5aab7e4 100644
--- a/src/test/scala/chiselTests/FixedPointSpec.scala
+++ b/src/test/scala/chiselTests/FixedPointSpec.scala
@@ -5,6 +5,7 @@ package chiselTests
 import chisel3._
 import chisel3.experimental.FixedPoint
 import chisel3.internal.firrtl.{BinaryPoint, Width}
+import chisel3.stage.ChiselStage
 import chisel3.testers.BasicTester
 import org.scalatest._
 import org.scalatest.flatspec.AnyFlatSpec
@@ -148,7 +149,7 @@ class FixedPointLitExtractTester extends BasicTester {
   stop()
 }
 
-class FixedPointSpec extends ChiselPropSpec {
+class FixedPointSpec extends ChiselPropSpec with Utils {
   property("should allow set binary point") {
     assertTesterPasses { new SBPTester }
   }
@@ -159,7 +160,9 @@ class FixedPointSpec extends ChiselPropSpec {
     assertTesterPasses { new FixedPointMuxTester }
   }
   property("Negative shift amounts are invalid") {
-    a [ChiselException] should be thrownBy { elaborate(new NegativeShift(FixedPoint(1.W, 0.BP))) }
+    a [ChiselException] should be thrownBy extractCause[ChiselException] {
+      ChiselStage.elaborate(new NegativeShift(FixedPoint(1.W, 0.BP)))
+    }
   }
   property("Bit extraction on literals should work for all non-negative indices") {
     assertTesterPasses(new FixedPointLitExtractTester)