src/test/java/com/android/tools/r8/desugar/desugaredlibrary/conversiontests/APIConversionFinalClassTest.java

// Copyright (c) 2019, 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.desugar.desugaredlibrary.conversiontests;

import static org.hamcrest.core.StringContains.containsString;

import com.android.tools.r8.TestParameters;
import com.android.tools.r8.ToolHelper;
import com.android.tools.r8.desugar.desugaredlibrary.DesugaredLibraryTestBase;
import com.android.tools.r8.utils.AndroidApiLevel;
import com.android.tools.r8.utils.BooleanUtils;
import java.nio.file.Path;
import java.time.Year;
import java.util.List;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

@RunWith(Parameterized.class)
public class APIConversionFinalClassTest extends DesugaredLibraryTestBase {

  private final TestParameters parameters;
  private final boolean shrinkDesugaredLibrary;

  private static final AndroidApiLevel MIN_SUPPORTED = AndroidApiLevel.O;

  private static Path customLib;

  @Parameterized.Parameters(name = "{0}, shrinkDesugaredLibrary: {1}")
  public static List<Object[]> data() {
    return buildParameters(getTestParameters().withDexRuntimesStartingFromIncluding(ToolHelper.DexVm.Version.V8_1_0).withApiLevelsEndingAtExcluding(AndroidApiLevel.O).build(), BooleanUtils.values());
  }

  public APIConversionFinalClassTest(TestParameters parameters, boolean shrinkDesugaredLibrary) {
    this.shrinkDesugaredLibrary = shrinkDesugaredLibrary;
    this.parameters = parameters;
  }

  @BeforeClass
  public static void compileCustomLib() throws Exception {
    customLib =
        testForD8(getStaticTemp())
            .addProgramClasses(CustomLibClass.class)
            .setMinApi(MIN_SUPPORTED)
            .compile()
            .writeToZip();
  }

  @Test
  public void testFinalMethod() throws Exception {
    KeepRuleConsumer keepRuleConsumer = createKeepRuleConsumer(parameters);
    testForD8()
        .setMinApi(AndroidApiLevel.B)
        .addProgramClasses(Executor.class)
        .addLibraryClasses(CustomLibClass.class)
        .enableCoreLibraryDesugaring(parameters.getApiLevel(), keepRuleConsumer)
        .compile()
        .addDesugaredCoreLibraryRunClassPath(
            this::buildDesugaredLibrary,
            parameters.getApiLevel(),
            keepRuleConsumer.get(),
            shrinkDesugaredLibrary)
        .addRunClasspathFiles(customLib)
        .run(parameters.getRuntime(), Executor.class)
        .assertFailureWithErrorThatMatches(containsString("NoSuchMethodError"));
  }

  static class Executor {

    public static void main(String[] args) {
      System.out.println(CustomLibClass.libCall(Year.now()));
    }
  }

  // This class will be put at compilation time as library and on the runtime class path.
  // This class is convenient for easy testing. Each method plays the role of methods in the
  // platform APIs for which argument/return values need conversion.
  static class CustomLibClass {

    // We use Year because Year is a final class with no custom conversion but Year has been
    // unused in the Android library so far.
    public static long libCall(Year year) {
      return 0L;
    }
  }
}