Fix literal width (#389)

Fixes #388

1 files changed, 17 insertions, 0 deletions

diff --git a/src/test/scala/chiselTests/WidthSpec.scala b/src/test/scala/chiselTests/WidthSpec.scala
new file mode 100644
index 00000000..9a5b1860
--- /dev/null
+++ b/src/test/scala/chiselTests/WidthSpec.scala
@@ -0,0 +1,17 @@
+// See LICENSE for license details.
+
+package chiselTests
+
+import chisel3._
+
+class WidthSpec extends ChiselFlatSpec {
+  "Literals without specified widths" should "get the minimum legal width" in {
+    "hdeadbeef".U.getWidth should be (32)
+    "h_dead_beef".U.getWidth should be (32)
+    "h0a".U.getWidth should be (4)
+    "h1a".U.getWidth should be (5)
+    "h0".U.getWidth should be (1)
+    1.U.getWidth should be (1)
+    1.S.getWidth should be (2)
+  }
+}