File file2 = testRepository.createFile(project.getProject(), "file2");
testRepository.appendFileContent(file2, "file2-1");
RevCommit commit = testRepository.addAndCommit(project.getProject(), file2,
"side commit 1");
MergeOperation operation = new MergeOperation(
testRepository.getRepository(), MASTER);
operation.execute(new NullProgressMonitor());
assertTrue(testRepository.getRepository().resolve(SIDE).equals(commit));
}