src/test/java/com/android/tools/r8/desugar/desugaredlibrary/DesugaredLibraryCloneTest.java

// Copyright (c) 2021, 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;

import static com.android.tools.r8.DiagnosticsMatcher.diagnosticException;

import com.android.tools.r8.CompilationFailedException;
import com.android.tools.r8.TestParameters;
import com.android.tools.r8.utils.BooleanUtils;
import java.time.DayOfWeek;
import java.util.List;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

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

  private final TestParameters parameters;
  private final boolean shrinkDesugaredLibrary;

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

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

  @Test(expected = CompilationFailedException.class)
  public void testD8() throws Exception {
    KeepRuleConsumer keepRuleConsumer = createKeepRuleConsumer(parameters);
    testForD8()
        .addInnerClasses(getClass())
        .setMinApi(parameters.getApiLevel())
        .enableCoreLibraryDesugaring(parameters.getApiLevel(), keepRuleConsumer)
        .compileWithExpectedDiagnostics(
            diagnostics ->
                // TODO(b/185735455): Should not throw an error.
                diagnostics.assertErrorThatMatches(
                    diagnosticException(NullPointerException.class)));
  }

  @Test(expected = CompilationFailedException.class)
  public void testR8() throws Exception {
    KeepRuleConsumer keepRuleConsumer = createKeepRuleConsumer(parameters);
    testForR8(parameters.getBackend())
        .addInnerClasses(getClass())
        .addKeepMainRule(Main.class)
        .setMinApi(parameters.getApiLevel())
        .enableCoreLibraryDesugaring(parameters.getApiLevel(), keepRuleConsumer)
        .compileWithExpectedDiagnostics(
            diagnostics ->
                // TODO(b/185735455): Should not throw an error.
                diagnostics.assertErrorThatMatches(
                    diagnosticException(NullPointerException.class)));
  }

  public static class Main {

    public static void main(String[] args) {
      DayOfWeek[] dayOfWeeks = new DayOfWeek[args.length + 1];
      if (args.length == 0) {
        dayOfWeeks[0] = DayOfWeek.MONDAY;
      }
      print(dayOfWeeks.clone());
    }

    public static void print(DayOfWeek[] arr) {
      if (arr.length > 0) {
        System.out.println("Just another manic " + arr[0]);
      }
    }
  }
}