Add a test for unboxed enum rewriting of const-class instructions

Bug: 226413913
Change-Id: I449c5252bbda6b1113b8e305397657ad06910bed

src/test/java/com/android/tools/r8/enumunboxing/ConstClassEnumUnboxingTest.java

diff --git a/src/test/java/com/android/tools/r8/enumunboxing/ConstClassEnumUnboxingTest.java b/src/test/java/com/android/tools/r8/enumunboxing/ConstClassEnumUnboxingTest.java
new file mode 100644
index 0000000..8f1d0ab
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/enumunboxing/ConstClassEnumUnboxingTest.java
@@ -0,0 +1,53 @@
+// Copyright (c) 2022, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+package com.android.tools.r8.enumunboxing;
+
+import com.android.tools.r8.TestParameters;
+import java.util.List;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameter;
+import org.junit.runners.Parameterized.Parameters;
+
+@RunWith(Parameterized.class)
+public class ConstClassEnumUnboxingTest extends EnumUnboxingTestBase {
+
+  @Parameter(0)
+  public TestParameters parameters;
+
+  @Parameter(1)
+  public EnumKeepRules enumKeepRules;
+
+  @Parameters(name = "{0}, keep: {1}")
+  public static List<Object[]> data() {
+    return buildParameters(
+        getTestParameters().withAllRuntimesAndApiLevels().build(), getAllEnumKeepRules());
+  }
+
+  @Test
+  public void testEnumUnboxing() throws Exception {
+    testForR8(parameters.getBackend())
+        .addInnerClasses(ConstClassEnumUnboxingTest.class)
+        .addKeepMainRule(Main.class)
+        .addKeepRules(enumKeepRules.getKeepRules())
+        .addEnumUnboxingInspector(inspector -> inspector.assertUnboxed(MyEnum.class))
+        .setMinApi(parameters.getApiLevel())
+        .compile()
+        .run(parameters.getRuntime(), Main.class)
+        .assertSuccessWithOutputLines("int");
+  }
+
+  enum MyEnum {
+    A
+  }
+
+  static class Main {
+
+    public static void main(String[] args) {
+      System.out.println(MyEnum.class.getName());
+    }
+  }
+}