[Demonstration 1]

[Buggy Method]
@Test
public void simpleRun_identical_1() throws IOException, ParserConfigurationException, TransformerException {
    // prepare two mathml files, cmml is in the annotate element
    String refMathML = IOUtils.toString(this.getClass().getResourceAsStream("mathml_annotation_1.xml"), "UTF-8");
    String compMathML = IOUtils.toString(this.getClass().getResourceAsStream("mathml_annotation_2.xml"), "UTF-8");
    // test the old comparison results
    Map<String, Object> result = MathPlag.compareOriginalFactors(refMathML, compMathML);
    assertThat(result, notNullValue());
    assertThat(result.get("coverage"), is(1.0));
    assertThat(result.get("depth"), is(5));
    assertThat(result.get("structure match"), is(true));
    assertThat(result.get("formula"), is(false));
    // test the mathplag results
    List<Match> matches = MathPlag.compareIdenticalMathML(refMathML, compMathML);
    assertThat(matches, notNullValue());
    assertThat(matches.size(), is(1));
    assertThat(matches.get(0).getId(), is("p1.1.m1.1.4.cmml"));
    assertThat(matches.get(0).getCoverage(), is(1.0));
}

[Buggy Hunk]
public void simpleRun_identical_1() throws IOException, ParserConfigurationException, TransformerException {

[Patch]
public void simpleRun_identical_1() throws IOException, ParserConfigurationException, TransformerException, XPathExpressionException {

[Demonstration 2]

[Buggy Method]
@Test
public void shouldCompleteSuccessfully() throws Exception {
    PlatformTransactionManager transactionManager = createNonFailingTransactionManager("single");
    setupTransactionManagers(transactionManager);
    createAndCommitTransaction();
    assertThat(transactionManager, isCommitted());
}

[Buggy Hunk]
public void shouldCompleteSuccessfully() throws Exception {

[Patch]
public void shouldCompleteSuccessfully() {

[Demonstration 3]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));