src/test/java/com/android/tools/r8/desugar/desugaredlibrary/jdk11/FilesWatchEventTest.java

// Copyright (c) 2022, 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.jdk11;

import static com.android.tools.r8.desugar.desugaredlibrary.test.CompilationSpecification.DEFAULT_SPECIFICATIONS;
import static com.android.tools.r8.desugar.desugaredlibrary.test.LibraryDesugaringSpecification.JDK11_PATH;
import static java.nio.file.StandardWatchEventKinds.ENTRY_CREATE;

import com.android.tools.r8.TestParameters;
import com.android.tools.r8.TestRuntime.CfVm;
import com.android.tools.r8.ToolHelper;
import com.android.tools.r8.ToolHelper.DexVm.Version;
import com.android.tools.r8.desugar.desugaredlibrary.DesugaredLibraryTestBase;
import com.android.tools.r8.desugar.desugaredlibrary.test.CompilationSpecification;
import com.android.tools.r8.desugar.desugaredlibrary.test.LibraryDesugaringSpecification;
import com.android.tools.r8.utils.StringUtils;
import com.google.common.collect.ImmutableList;
import java.io.IOException;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.WatchEvent;
import java.nio.file.WatchKey;
import java.nio.file.WatchService;
import java.util.List;
import org.junit.Assume;
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 FilesWatchEventTest extends DesugaredLibraryTestBase {

  private static final String EXPECTED_RESULT =
      StringUtils.lines("true", "true", "true", "ENTRY_CREATE", "Path", "foo", "foo", "true");
  private static final String EXPECTED_RESULT_DESUGARING =
      StringUtils.lines("class java.lang.UnsupportedOperationException :: null");

  private final TestParameters parameters;
  private final LibraryDesugaringSpecification libraryDesugaringSpecification;
  private final CompilationSpecification compilationSpecification;

  @Parameters(name = "{0}, spec: {1}, {2}")
  public static List<Object[]> data() {
    return buildParameters(
        // Skip Android 4.4.4 due to missing libjavacrypto.
        getTestParameters()
            .withCfRuntime(CfVm.JDK11)
            .withDexRuntime(Version.V4_0_4)
            .withDexRuntimesStartingFromIncluding(Version.V5_1_1)
            .withAllApiLevels()
            .build(),
        ImmutableList.of(JDK11_PATH),
        DEFAULT_SPECIFICATIONS);
  }

  public FilesWatchEventTest(
      TestParameters parameters,
      LibraryDesugaringSpecification libraryDesugaringSpecification,
      CompilationSpecification compilationSpecification) {
    this.parameters = parameters;
    this.libraryDesugaringSpecification = libraryDesugaringSpecification;
    this.compilationSpecification = compilationSpecification;
  }

  @Test
  public void test() throws Throwable {
    if (parameters.isCfRuntime() && !ToolHelper.isWindows()) {
      // Reference runtime, we use Jdk 11 since this is Jdk 11 desugared library, not that Jdk 8
      // behaves differently on this test.
      Assume.assumeTrue(parameters.isCfRuntime(CfVm.JDK11) && !ToolHelper.isWindows());
      testForJvm()
          .addInnerClasses(getClass())
          .run(parameters.getRuntime(), TestClass.class)
          .assertSuccessWithOutput(EXPECTED_RESULT);
      return;
    }
    testForDesugaredLibrary(parameters, libraryDesugaringSpecification, compilationSpecification)
        .addInnerClasses(getClass())
        .addKeepMainRule(TestClass.class)
        .compile()
        .withArt6Plus64BitsLib()
        .run(parameters.getRuntime(), TestClass.class)
        .assertSuccessWithOutput(
            libraryDesugaringSpecification.usesPlatformFileSystem(parameters)
                ? EXPECTED_RESULT
                : EXPECTED_RESULT_DESUGARING);
  }

  public static class TestClass {

    public static void main(String[] args) throws IOException, InterruptedException {
      Path dir = Files.createTempDirectory("tmpDictWatch");
      FileSystem fs = FileSystems.getDefault();

      try (WatchService watcher = fs.newWatchService()) {
        WatchKey myKey = dir.register(watcher, ENTRY_CREATE);
        System.out.println(myKey.isValid());
        System.out.println(myKey.watchable().equals(dir));

        Path file = dir.resolve("foo");
        Files.createFile(file);

        WatchKey key = watcher.take();
        System.out.println(key.equals(myKey));

        WatchEvent<?> event = myKey.pollEvents().iterator().next();
        System.out.println(event.kind());
        System.out.println(event.kind().type().getSimpleName());
        System.out.println(event.context());
        System.out.println(((Path) event.context()).getFileName());

        System.out.println(myKey.reset());
        Files.delete(file);
      } catch (UnsupportedOperationException e) {
        System.out.println(e.getClass() + " :: " + e.getMessage());
      }

      Files.delete(dir);
    }
  }
}