Test -if rule behavior in presence of class retention annotations

Bug: b/394275411
Change-Id: I1d1b99d78111daff0b29aaf5337d9148323c8db8
diff --git a/src/test/java/com/android/tools/r8/partial/PartialCompilationIfClassRetentionAnnotationTest.java b/src/test/java/com/android/tools/r8/partial/PartialCompilationIfClassRetentionAnnotationTest.java
new file mode 100644
index 0000000..ccad0ac
--- /dev/null
+++ b/src/test/java/com/android/tools/r8/partial/PartialCompilationIfClassRetentionAnnotationTest.java
@@ -0,0 +1,60 @@
+// Copyright (c) 2025, 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.partial;
+
+import static com.android.tools.r8.utils.codeinspector.Matchers.isAbsent;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+import com.android.tools.r8.TestBase;
+import com.android.tools.r8.TestParameters;
+import com.android.tools.r8.TestParametersCollection;
+import com.android.tools.r8.utils.codeinspector.ClassSubject;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+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 PartialCompilationIfClassRetentionAnnotationTest extends TestBase {
+
+  @Parameter(0)
+  public TestParameters parameters;
+
+  @Parameters(name = "{0}")
+  public static TestParametersCollection data() {
+    return getTestParameters().withAllRuntimesAndApiLevels().build();
+  }
+
+  @Test
+  public void test() throws Exception {
+    parameters.assumeCanUseR8Partial();
+    testForR8Partial(parameters)
+        .addR8ExcludedClasses(ClassRetentionAnnotation.class, Main.class)
+        .addR8IncludedClasses(Unused.class)
+        .addKeepRules(
+            "-if @" + ClassRetentionAnnotation.class.getTypeName() + " class *",
+            "-keep class " + Unused.class.getTypeName())
+        .compile()
+        .inspect(
+            inspector -> {
+              // TODO(b/394275411): Should be present.
+              ClassSubject unusedClassSubject = inspector.clazz(Unused.class);
+              assertThat(unusedClassSubject, isAbsent());
+            });
+  }
+
+  @Retention(RetentionPolicy.CLASS)
+  @interface ClassRetentionAnnotation {}
+
+  @ClassRetentionAnnotation
+  static class Main {
+
+    public static void main(String[] args) {}
+  }
+
+  static class Unused {}
+}
diff --git a/src/test/testbase/java/com/android/tools/r8/TestBase.java b/src/test/testbase/java/com/android/tools/r8/TestBase.java
index 7e7b4b6..a1b39e9 100644
--- a/src/test/testbase/java/com/android/tools/r8/TestBase.java
+++ b/src/test/testbase/java/com/android/tools/r8/TestBase.java
@@ -255,6 +255,10 @@
         .applyIf(parameters.isRandom(), R8PartialTestBuilder::allowUnusedDontWarnPatterns);
   }
 
+  public R8PartialTestBuilder testForR8Partial(TestParameters parameters) {
+    return testForR8Partial(parameters.getBackend()).setMinApi(parameters);
+  }
+
   public R8PartialTestBuilder testForR8Partial(Backend backend) {
     return testForR8Partial(temp, backend);
   }