1 files changed, 52 insertions, 0 deletions
diff --git a/src/test/scala/chiselTests/ToTargetSpec.scala b/src/test/scala/chiselTests/ToTargetSpec.scala
new file mode 100644
index 00000000..dc4ec448
--- /dev/null
+++ b/src/test/scala/chiselTests/ToTargetSpec.scala
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: Apache-2.0
+
+package chiselTests
+
+import chisel3._
+import chisel3.stage.ChiselStage
+import chisel3.util.Queue
+import chisel3.internal.ChiselException
+
+class ToTargetSpec extends ChiselFlatSpec with Utils {
+
+  var m: InstanceNameModule = _
+  ChiselStage.elaborate { m = new InstanceNameModule; m }
+
+  val mn = "InstanceNameModule"
+  val top = s"~$mn|$mn"
+
+  behavior.of(".toTarget")
+
+  val deprecationMsg = "Accessing the .instanceName or .toTarget of non-hardware Data is deprecated"
+
+  it should "work with module IO" in {
+    val io = m.io.toTarget.toString
+    assert(io == s"$top>io")
+  }
+
+  it should "not work for literals" in {
+    a[ChiselException] shouldBe thrownBy {
+      m.x.toTarget.toString
+    }
+  }
+
+  it should "work with non-hardware values (but be deprecated)" in {
+    val (ylog, y) = grabLog(m.y.toTarget.toString)
+    val (zlog, z) = grabLog(m.z.toTarget.toString)
+    assert(y == s"$top>y")
+    ylog should include(deprecationMsg)
+    assert(z == s"$top>z")
+    zlog should include(deprecationMsg)
+  }
+
+  it should "work with non-hardware bundle elements (but be deprecated)" in {
+    val (log, foo) = grabLog(m.z.foo.toTarget.toString)
+    log should include(deprecationMsg)
+    assert(foo == s"$top>z.foo")
+  }
+
+  it should "work with modules" in {
+    val q = m.q.toTarget.toString
+    assert(q == s"~$mn|Queue")
+  }
+}