src/test/java/com/android/tools/r8/androidresources/AlwaysKeepIDsInLegacyMode.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.androidresources;

import com.android.tools.r8.R8TestBuilder;
import com.android.tools.r8.TestBase;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.androidresources.AndroidResourceTestingUtils.AndroidTestResource;
import com.android.tools.r8.androidresources.AndroidResourceTestingUtils.AndroidTestResourceBuilder;
import com.android.tools.r8.utils.BooleanUtils;
import java.util.List;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
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 AlwaysKeepIDsInLegacyMode extends TestBase {

  @Parameter(0)
  public TestParameters parameters;

  @Parameter(1)
  public boolean optimized;

  @Parameters(name = "{0}, optimized: {1}")
  public static List<Object[]> data() {
    return buildParameters(
        getTestParameters().withDefaultDexRuntime().withAllApiLevels().build(),
        BooleanUtils.values());
  }

  public static AndroidTestResource getTestResources(TemporaryFolder temp) throws Exception {
    return new AndroidTestResourceBuilder()
        .withSimpleManifestAndAppNameString()
        .addRClassInitializeWithDefaultValues(R.string.class, R.id.class)
        .build(temp);
  }

  @Test
  public void testR8() throws Exception {
    testForR8(parameters.getBackend())
        .setMinApi(parameters)
        .addProgramClasses(FooBar.class)
        .addAndroidResources(getTestResources(temp))
        .addKeepMainRule(FooBar.class)
        .applyIf(optimized, R8TestBuilder::enableOptimizedShrinking)
        .compile()
        .inspectShrunkenResources(
            resourceTableInspector -> {
              resourceTableInspector.assertContainsResourceWithName("string", "foo");
              // The id resource should not be removed in any mode, even though there are no
              // references to it.
              resourceTableInspector.assertContainsResourceWithName("id", "the_id");
            })
        .run(parameters.getRuntime(), FooBar.class)
        .assertSuccess();
  }

  public static class FooBar {

    public static void main(String[] args) {
      System.out.println(R.string.foo);
    }
  }

  public static class R {
    public static class string {
      public static int foo;
    }

    public static class id {
      public static int the_id;
    }
  }
}