@Override
  public <A extends Arg> JavaTest createBuildRule(
      TargetGraph targetGraph, BuildRuleParams params, BuildRuleResolver resolver, A args)
      throws NoSuchBuildTargetException {
    SourcePathResolver pathResolver = new SourcePathResolver(resolver);

    JavacOptions javacOptions =
        JavacOptionsFactory.create(templateJavacOptions, params, resolver, pathResolver, args);

    CxxLibraryEnhancement cxxLibraryEnhancement =
        new CxxLibraryEnhancement(
            params, args.useCxxLibraries, resolver, pathResolver, cxxPlatform);
    params = cxxLibraryEnhancement.updatedParams;

    BuildTarget abiJarTarget = params.getBuildTarget().withAppendedFlavors(CalculateAbi.FLAVOR);

    JavaTest test =
        resolver.addToIndex(
            new JavaTest(
                params.appendExtraDeps(
                    Iterables.concat(
                        BuildRules.getExportedRules(
                            Iterables.concat(
                                params.getDeclaredDeps().get(),
                                resolver.getAllRules(args.providedDeps.get()))),
                        pathResolver.filterBuildRuleInputs(javacOptions.getInputs(pathResolver)))),
                pathResolver,
                args.srcs.get(),
                ResourceValidator.validateResources(
                    pathResolver, params.getProjectFilesystem(), args.resources.get()),
                javacOptions.getGeneratedSourceFolderName(),
                args.labels.get(),
                args.contacts.get(),
                args.proguardConfig.transform(
                    SourcePaths.toSourcePath(params.getProjectFilesystem())),
                new BuildTargetSourcePath(abiJarTarget),
                javacOptions.trackClassUsage(),
                /* additionalClasspathEntries */ ImmutableSet.<Path>of(),
                args.testType.or(TestType.JUNIT),
                new JavacToJarStepFactory(javacOptions, JavacOptionsAmender.IDENTITY),
                javaOptions.getJavaRuntimeLauncher(),
                args.vmArgs.get(),
                cxxLibraryEnhancement.nativeLibsEnvironment,
                validateAndGetSourcesUnderTest(
                    args.sourceUnderTest.get(), params.getBuildTarget(), resolver),
                args.resourcesRoot,
                args.mavenCoords,
                args.testRuleTimeoutMs.or(defaultTestRuleTimeoutMs),
                args.env.get(),
                args.getRunTestSeparately(),
                args.stdOutLogLevel,
                args.stdErrLogLevel));

    resolver.addToIndex(
        CalculateAbi.of(
            abiJarTarget, pathResolver, params, new BuildTargetSourcePath(test.getBuildTarget())));

    return test;
  }
  private Jsr199Javac createJavac(boolean withSyntaxError, Optional<Path> javacJar)
      throws IOException {

    File exampleJava = tmp.newFile("Example.java");
    Files.write(
        Joiner.on('\n')
            .join(
                "package com.example;",
                "",
                "public class Example {" + (withSyntaxError ? "" : "}")),
        exampleJava,
        Charsets.UTF_8);

    Path pathToOutputDirectory = Paths.get("out");
    tmp.newFolder(pathToOutputDirectory.toString());

    Optional<SourcePath> jar =
        javacJar.transform(SourcePaths.toSourcePath(new FakeProjectFilesystem()));
    if (jar.isPresent()) {
      return new JarBackedJavac("com.sun.tools.javac.api.JavacTool", ImmutableSet.of(jar.get()));
    }

    return new JdkProvidedInMemoryJavac();
  }