code: /*
   * Copyright (c) 2018, The Regents of the University of California
   *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   * 1. Redistributions of source code must retain the above copyright
   * notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   * notice, this list of conditions and the following disclaimer in the
   * documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package edu.berkeley.cs.jqf.examples.errorprone;
  
  import java.io.BufferedWriter;
  import java.io.ByteArrayOutputStream;
  import java.io.File;
  import java.io.IOException;
  import java.io.PrintWriter;
  import java.nio.file.Files;
  import java.nio.file.Path;
  
  import com.google.errorprone.ErrorProneCompiler;
  import com.google.errorprone.bugpatterns.BugChecker;
  import com.google.errorprone.bugpatterns.EqualsHashCode;
  import com.pholser.junit.quickcheck.From;
  import com.sun.tools.javac.main.Main;
  import edu.berkeley.cs.jqf.examples.common.AsciiStringGenerator;
  import edu.berkeley.cs.jqf.fuzz.Fuzz;
  import edu.berkeley.cs.jqf.fuzz.JQF;
  import org.junit.Assert;
  import org.junit.Assume;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  
  import static com.sun.tools.javac.main.Main.Result.*;
  
  /**
   * @author Rohan Padhye
   */
  @RunWith(JQF.class)
  public class CompilerTest {
  
      private Class<? extends BugChecker> bugCheckerClass = EqualsHashCode.class;
      private ErrorProneCompiler compiler;
      private final String[] args = {
              "-encoding", "UTF-8",
              "-XDdev",
              "-parameters",
              "-XDcompilePolicy=simple",
              "-proc:none"
      };
  
  
      private File writeToFile(String data) throws IOException {
          Path tmpDir = Files.createTempDirectory("errorprone-fuzz");
          Path javaFile = tmpDir.resolve("Test.java");
  
          try (BufferedWriter out = Files.newBufferedWriter(javaFile)) {
              out.write(data);
          }
  
          return javaFile.toFile();
      }
  
      @Fuzz
      public void testWithString(@From(AsciiStringGenerator.class) String classBody) {
          // Construct test class with provided body
          String code = String.format("class Test { %s }", classBody);
          File javaFile;
          try {
              javaFile = writeToFile(code);
          } catch (IOException e) {
              throw new RuntimeException(e);
          }
  
          // Compile using javac + error-prone
          Main.Result result = ErrorProneCompiler.compile(new String[]{ javaFile.getAbsolutePath()},
                  new PrintWriter(new ByteArrayOutputStream( )));
  
          // Ensure that there was no issue with test command or environment
          Assert.assertFalse(result == CMDERR);
          Assert.assertFalse(result == SYSERR);
  
          // Ignore compilation errors (only semantically valid inputs will pass)
          Assume.assumeFalse(result == ERROR);
  
          // This is the main test criteria -- abnormal exits are bugs
          Assert.assertFalse( result == ABNORMAL);
  
      }
  
      @Test
      public void test() {
          testWithString("{ System.out.println(0); }");
      }
  }
  