Refactor tests to use stop() and assert() instead of io.error/io.done

Gate assert, printf, stop by reset
Fix testbenches that never worked
Change simulation prints to display cycle at which test was signaled to end, not when simulator stops
Better documentation for Counter

1 files changed, 7 insertions, 2 deletions

diff --git a/src/test/scala/chiselTests/Decoder.scala b/src/test/scala/chiselTests/Decoder.scala
index 7751804b..8a9c5a5b 100644
--- a/src/test/scala/chiselTests/Decoder.scala
+++ b/src/test/scala/chiselTests/Decoder.scala
@@ -20,8 +20,13 @@ class DecoderTester(pairs: List[(String, String)]) extends BasicTester {
   val (cnt, wrap) = Counter(Bool(true), pairs.size)
   val dut = Module(new Decoder(bitpats))
   dut.io.inst := Vec(insts.map(UInt(_)))(cnt)
-  when(!dut.io.matched) { io.done := Bool(true); io.error := cnt }
-  when(wrap) { io.done := Bool(true) }
+  when(!dut.io.matched) {
+    assert(cnt === UInt(0))
+    stop()
+  }
+  when(wrap) {
+    stop()
+  }
 }
 
 class DecoderSpec extends ChiselPropSpec {