src/test/java/com/android/tools/r8/androidresources/ResourceShrinkerLoggingTest.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 static org.junit.Assert.assertTrue;

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 com.google.common.collect.ImmutableList;
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 ResourceShrinkerLoggingTest 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.drawable.class)
        .build(temp);
  }

  @Test
  public void testR8() throws Exception {
    testForR8(parameters.getBackend())
        .setMinApi(parameters)
        .addProgramClasses(FooBar.class)
        .applyIf(optimized, R8TestBuilder::enableOptimizedShrinking)
        .addResourceShrinkerLogCapture()
        .addAndroidResources(getTestResources(temp))
        .addKeepMainRule(FooBar.class)
        .compile()
        .inspectShrunkenResources(
            resourceTableInspector -> {
              resourceTableInspector.assertContainsResourceWithName("string", "bar");
              resourceTableInspector.assertContainsResourceWithName("string", "foo");
              resourceTableInspector.assertContainsResourceWithName("drawable", "foobar");
              resourceTableInspector.assertDoesNotContainResourceWithName(
                  "string", "unused_string");
              resourceTableInspector.assertDoesNotContainResourceWithName(
                  "drawable", "unused_drawable");
            })
        .inspectResourceShrinkerLog(
            inspector -> {
              assertTrue(inspector.getFinished());
              if (!optimized) {
                // Consistent with the old AGP embedded shrinker
                // string:bar reachable from code
                for (String dexReachableString : ImmutableList.of("bar", "foo")) {
                  inspector.ensureDexReachable("string", dexReachableString);
                }
                // The app name is only reachable from the manifest, not dex
                inspector.ensureResourceRoot("string", "app_name");
                inspector.ensureUnreachable("drawable", "unused_drawable");
                inspector.ensureDexReachable("drawable", "foobar");
              } else {
                inspector.ensureReachableOptimized("string", "bar");
                inspector.ensureReachableOptimized("string", "foo");
                inspector.ensureReachableOptimized("drawable", "foobar");

                inspector.ensureUnreachableOptimized("drawable", "unused_drawable");
              }
            })
        .run(parameters.getRuntime(), FooBar.class)
        .assertSuccess();
  }

  public static class FooBar {

    public static void main(String[] args) {
      if (System.currentTimeMillis() == 0) {
        System.out.println(R.drawable.foobar);
        System.out.println(R.string.bar);
        System.out.println(R.string.foo);
      }
    }
  }

  public static class R {

    public static class string {

      public static int bar;
      public static int foo;
      public static int unused_string;
    }

    public static class drawable {

      public static int foobar;
      public static int unused_drawable;
    }
  }
}