From ccb532af5fc9ae96c011a9efd852f5e153b12613 Mon Sep 17 00:00:00 2001
From: ducky
Date: Sat, 16 Jan 2016 18:03:11 -0800
Subject: Add When test and fix when / elsewhen / otherwise behavior

---
 src/test/scala/chiselTests/When.scala | 60 +++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 src/test/scala/chiselTests/When.scala

(limited to 'src/test')

diff --git a/src/test/scala/chiselTests/When.scala b/src/test/scala/chiselTests/When.scala
new file mode 100644
index 00000000..b78e1c5a
--- /dev/null
+++ b/src/test/scala/chiselTests/When.scala
@@ -0,0 +1,60 @@
+// See LICENSE for license details.
+
+package chiselTests
+
+import org.scalatest._
+import Chisel._
+import Chisel.testers.BasicTester
+
+class WhenTester() extends BasicTester {
+  val cnt = Counter(4)
+  when(Bool(true)) { cnt.inc() }
+
+  val out = Wire(UInt(width=3))
+  when(cnt.value === UInt(0)) {
+    out := UInt(1)
+  } .elsewhen (cnt.value === UInt(1)) {
+    out := UInt(2)
+  } .elsewhen (cnt.value === UInt(2)) {
+    out := UInt(3)
+  } .otherwise {
+    out := UInt(0)
+  }
+
+  assert(out === cnt.value + UInt(1))
+
+  when(cnt.value === UInt(3)) {
+    stop()
+  }
+}
+
+class OverlappedWhenTester() extends BasicTester {
+  val cnt = Counter(4)
+  when(Bool(true)) { cnt.inc() }
+
+  val out = Wire(UInt(width=3))
+  when(cnt.value <= UInt(0)) {
+    out := UInt(1)
+  } .elsewhen (cnt.value <= UInt(1)) {
+    out := UInt(2)
+  } .elsewhen (cnt.value <= UInt(2)) {
+    out := UInt(3)
+  } .otherwise {
+    out := UInt(0)
+  }
+
+  assert(out === cnt.value + UInt(1))
+
+  when(cnt.value === UInt(3)) {
+    stop()
+  }
+}
+
+class WhenSpec extends ChiselFlatSpec {
+  "When, elsewhen, and otherwise with orthogonal conditions" should "work" in {
+    assert(execute{ new WhenTester })
+  }
+  "When, elsewhen, and otherwise with overlapped conditions" should "work" in {
+    assert(execute{ new OverlappedWhenTester })
+  }
+}
-- 
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