@Test
public void branchChangedLines_returns_empty_set_for_files_with_lines_removed_only() throws GitAPIException, IOException {

  String fileName = "file-in-first-commit.xoo";
  git.branchCreate().setName("b1").call();
  git.checkout().setName("b1").call();
  removeLineInFile(fileName, 2);
  commit(fileName);
  Path filePath = worktree.resolve(fileName);
  Map<Path, Set<Integer>> changedLines = newScmProvider().branchChangedLines("master", worktree, Collections.singleton(filePath));
  // both lines appear correctly
  assertThat(changedLines).containsExactly(entry(filePath, emptySet()));
}