src/test/java/com/android/tools/r8/desugar/desugaredlibrary/RetargetOverrideTest.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;

import com.android.tools.r8.TestParameters;
import com.android.tools.r8.TestParametersCollection;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.concurrent.atomic.AtomicInteger;
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 RetargetOverrideTest extends CoreLibDesugarTestBase {

  private final TestParameters parameters;

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

  public RetargetOverrideTest(TestParameters parameters) {
    this.parameters = parameters;
  }

  @Test
  public void testRetargetOverrideD8() throws Exception {
    String stdout =
        testForD8()
            .addInnerClasses(RetargetOverrideTest.class)
            .enableCoreLibraryDesugaring(parameters.getApiLevel())
            .setMinApi(parameters.getApiLevel())
            .compile()
            .addDesugaredCoreLibraryRunClassPath(
                this::buildDesugaredLibrary, parameters.getApiLevel())
            .run(parameters.getRuntime(), Executor.class)
            .assertSuccess()
            .getStdOut();
    assertLines2By2Correct(stdout);
  }

  @Test
  public void testRetargetOverrideR8() throws Exception {
    String stdout =
        testForR8(Backend.DEX)
            .addKeepMainRule(Executor.class)
            .addInnerClasses(RetargetOverrideTest.class)
            .enableCoreLibraryDesugaring(parameters.getApiLevel())
            .setMinApi(parameters.getApiLevel())
            .compile()
            .addDesugaredCoreLibraryRunClassPath(
                this::buildDesugaredLibrary, parameters.getApiLevel())
            .run(parameters.getRuntime(), Executor.class)
            .assertSuccess()
            .getStdOut();
    assertLines2By2Correct(stdout);
  }

  static class Executor {

    public static void main(String[] args) {
      java.sql.Date date = new java.sql.Date(123456789);
      System.out.println(date.toInstant());
      System.out.println("1970-01-02T10:17:36.789Z");

      GregorianCalendar gregCal = new GregorianCalendar(1990, 2, 22);
      System.out.println(gregCal.toInstant());
      System.out.println("1990-03-22T00:00:00Z");

      // TODO(b/142846107): Enable overrides of retarget core members.
      // MyCalendarOverride myCal = new MyCalendarOverride(1990, 2, 22);
      // System.out.println(myCal.toZonedDateTime());
      // System.out.println("1990-11-22T00:00Z[GMT]");
      // System.out.println(myCal.toInstant());
      // System.out.println("1990-03-22T00:00:00Z");

      MyCalendarNoOverride myCalN = new MyCalendarNoOverride(1990, 2, 22);
      System.out.println(myCalN.toZonedDateTime());
      System.out.println("1990-03-22T00:00Z[GMT]");
      System.out.println(myCalN.toInstant());
      System.out.println("1990-03-22T00:00:00Z");

      // TODO(b/142846107): Enable overrides of retarget core members.
      // MyDateOverride myDate = new MyDateOverride(123456789);
      // System.out.println(myDate.toInstant());
      // System.out.println("1970-01-02T10:17:45.789Z");

      MyDateNoOverride myDateN = new MyDateNoOverride(123456789);
      System.out.println(myDateN.toInstant());
      System.out.println("1970-01-02T10:17:36.789Z");

      MyAtomicInteger myAtomicInteger = new MyAtomicInteger(42);
      System.out.println(myAtomicInteger.getAndUpdate(x -> x + 1));
      System.out.println("42");
      System.out.println(myAtomicInteger.getAndUpdate(x -> x + 5));
      System.out.println("43");
      System.out.println(myAtomicInteger.updateAndGet(x -> x + 100));
      System.out.println("148");
      System.out.println(myAtomicInteger.updateAndGet(x -> x + 500));
      System.out.println("648");
    }
  }

  // static class MyCalendarOverride extends GregorianCalendar {
  //
  //   public MyCalendarOverride(int year, int month, int dayOfMonth) {
  //     super(year, month, dayOfMonth);
  //   }
  //
  //   // Cannot override toInstant (final).
  //
  //   @Override
  //   public ZonedDateTime toZonedDateTime() {
  //     return super.toZonedDateTime().withMonth(11);
  //   }
  // }

  static class MyCalendarNoOverride extends GregorianCalendar {
    public MyCalendarNoOverride(int year, int month, int dayOfMonth) {
      super(year, month, dayOfMonth);
    }
  }

  // static class MyDateOverride extends Date {
  //
  //   public MyDateOverride(long date) {
  //     super(date);
  //   }
  //
  //   @Override
  //   public Instant toInstant() {
  //     return super.toInstant().plusSeconds(9);
  //   }
  // }

  static class MyDateNoOverride extends Date {

    public MyDateNoOverride(long date) {
      super(date);
    }
  }

  static class MyAtomicInteger extends AtomicInteger {
    // No overrides, all final methods.
    public MyAtomicInteger(int initialValue) {
      super(initialValue);
    }
  }
}