Function compareFilemodes

test/tests/stage.js:241–274

(vsWorkdir, index, fileModeDifference)

  });

  function compareFilemodes(vsWorkdir, index, fileModeDifference) {
    //Takes diff of head commit vs Workdir (if vsWorkdir is set) or vs Index
    //(if vsWorkdir is unset). Note: there's only one file in the filemode
    //staging tests for which this helper fn was written.
    //index - index to use (vsWorkdir is unset)
    //fileModeDifference - expected (newfilemode) - (oldfilemode)
    return test.repository.getHeadCommit()
      .then(function(commit) {
        return commit.getTree();
      })
      .then(function(tree) {
        if (vsWorkdir) {
          return NodeGit.Diff.treeToWorkdir(test.repository, tree);
        } else {
          return NodeGit.Diff.treeToIndex(test.repository, tree, index);
        }
      })
      .then(function(diff) {
        return diff.getDelta(0);
      })
      .then(function(delta) {
        if (fileModeDifference === 0) {
          if (!delta) {
            return true;
          } else {
            throw ("File change when no file change expected.");
          }
        } else {
          assert(delta.newFile().mode() - delta.oldFile().mode() ===
            fileModeDifference);
        }
        return true;
      });
  }

  function createAndCommitFiles(repo, filePaths, fileContent, afterWriteFn) {
    filePaths = filePaths instanceof Array ? filePaths : [filePaths];