From b0c76525ed53c20dbbe4bd8eea4a9676d7247ec7 Mon Sep 17 00:00:00 2001
From: Jiuyang Liu
Date: Tue, 18 May 2021 14:53:59 +0000
Subject: test decode cache.

---
 .../util/experimental/DecoderSpec.scala            | 61 ++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 src/test/scala/chiselTests/util/experimental/DecoderSpec.scala

diff --git a/src/test/scala/chiselTests/util/experimental/DecoderSpec.scala b/src/test/scala/chiselTests/util/experimental/DecoderSpec.scala
new file mode 100644
index 00000000..3c9d490d
--- /dev/null
+++ b/src/test/scala/chiselTests/util/experimental/DecoderSpec.scala
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: Apache-2.0
+
+package chiselTests.util.experimental
+
+import chisel3.util.experimental.decode.{DecodeTableAnnotation, Minimizer, QMCMinimizer, TruthTable}
+import chiselTests.SMTModelCheckingSpec
+import chiselTests.util.experimental.minimizer.DecodeTestModule
+import firrtl.annotations.ReferenceTarget
+
+class DecoderSpec extends SMTModelCheckingSpec {
+  val xor = TruthTable(
+    """10->1
+      |01->1
+      |    0""".stripMargin)
+
+  def minimizer: Minimizer = QMCMinimizer
+
+  "decoder" should "pass without DecodeTableAnnotation" in {
+    test(
+      () => new DecodeTestModule(minimizer, table = xor),
+      s"${minimizer.getClass.getSimpleName}.noAnno",
+      success
+    )
+  }
+
+  "decoder" should "fail with a incorrect DecodeTableAnnotation" in {
+    test(
+      () => new DecodeTestModule(minimizer, table = xor),
+      s"${minimizer.getClass.getSimpleName}.incorrectAnno",
+      fail(0),
+      annos = Seq(
+        DecodeTableAnnotation(ReferenceTarget("", "", Nil, "", Nil),
+          """10->1
+            |01->1
+            |    0""".stripMargin,
+          """10->1
+            |    0""".stripMargin
+        )
+      )
+    )
+  }
+
+  "decoder" should "success with a correct DecodeTableAnnotation" in {
+    test(
+      () => new DecodeTestModule(minimizer, table = xor),
+      s"${minimizer.getClass.getSimpleName}.correctAnno",
+      success,
+      annos = Seq(
+        DecodeTableAnnotation(ReferenceTarget("", "", Nil, "", Nil),
+          """10->1
+            |01->1
+            |    0""".stripMargin,
+          QMCMinimizer.minimize(TruthTable(
+            """10->1
+              |01->1
+              |    0""".stripMargin)).toString
+        )
+      )
+    )
+  }
+}
-- 
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