src/test/java/com/android/tools/r8/partial/PartialCompilationClassAnnotatedInD8Test.java

// Copyright (c) 2024, 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.isPresent;
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.AndroidApiLevel;
import com.android.tools.r8.utils.internal.StringUtils;
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 PartialCompilationClassAnnotatedInD8Test extends TestBase {

  public static String EXPECTED_OUTPUT = StringUtils.lines("1");

  @Parameter(0)
  public TestParameters parameters;

  @Parameters(name = "{0}")
  public static TestParametersCollection data() {
    return getTestParameters()
        .withDexRuntimes()
        .withApiLevelsStartingAtIncluding(AndroidApiLevel.L)
        .build();
  }

  @Test
  public void testD8() throws Exception {
    parameters.assumeDexRuntime();
    testForD8(parameters.getBackend())
        .setMinApi(parameters)
        .addProgramClasses(Annotation.class, AnnotatedClass.class, Main.class)
        .run(parameters.getRuntime(), Main.class)
        .assertSuccessWithOutput(EXPECTED_OUTPUT);
  }

  @Test
  public void testR8() throws Exception {
    testForR8(parameters.getBackend())
        .setMinApi(parameters)
        .addProgramClasses(Annotation.class, AnnotatedClass.class, Main.class)
        .addKeepClassRulesWithAllowObfuscation(Annotation.class, AnnotatedClass.class)
        .addKeepRuntimeVisibleAnnotations()
        .addKeepMainRule(Main.class)
        .run(parameters.getRuntime(), Main.class)
        .assertSuccessWithOutput(EXPECTED_OUTPUT);
  }

  @Test
  public void testR8Partial() throws Exception {
    testForR8Partial(parameters.getBackend())
        .setMinApi(parameters)
        .addProgramClasses(Annotation.class, AnnotatedClass.class, Main.class)
        .addKeepMainRule(Main.class)
        .setR8PartialConfiguration(
            builder -> builder.includeAll().excludeClasses(AnnotatedClass.class))
        .run(parameters.getRuntime(), Main.class, getClass().getTypeName())
        .inspect(inspector -> assertThat(inspector.clazz(Annotation.class), isPresent()))
        .assertSuccessWithOutput(EXPECTED_OUTPUT);
  }

  // Compiled with R8
  @Retention(RetentionPolicy.RUNTIME)
  public @interface Annotation {}

  // Compiled with D8
  @Annotation
  public static class AnnotatedClass {

    void method() {
      System.out.println(AnnotatedClass.class.getAnnotations().length);
    }
  }

  public static class Main {

    public static void main(String[] args) throws Exception {
      new AnnotatedClass().method();
    }
  }
}