var assert = require("assert");

var path = require("path");

var fs = require("fs");

var promisify = require("promisify-node");

var readDir = promisify(fs.readdir);

var local = path.join.bind(path, __dirname);

describe("TreeBuilder", function(){

var Git = require("../../");

var reposPath = local("../repos/workdir");

//setup test repo each test

beforeEach(function() {

var test = this;

return Git.Repository.open(reposPath)

.then(function(repo) {

test.repo = repo;

});

});

//treebuilder created with no source when creating a new folder

// (each folder in git is a tree)

// or the root folder for a root commit

it("Can create a new treebuilder with no source", function(){

return Git.Treebuilder.create(this.repo, null);

});

//treebuilder created with a source tree can add / read from tree

it("Can create a treebuilder from the latest commit tree", function(){

var test = this;

//get latest commit

return test.repo.getHeadCommit()

//get tree of commit

.then(function(commit){ return commit.getTree(); })

//make treebuilder from tree

.then(function(tree){ return Git.Treebuilder.create(test.repo, tree); })

//verify treebuilder can do stuff

.then(function(treeBuilder){

//check

//count how many entries we should have

return readDir(reposPath)

//treebuilder should have all entries in the clean working dir

//(minus .git folder)

.then(function(dirEntries) {

return assert.equal(dirEntries.length-1, treeBuilder.entrycount());

});

});

});

//adding a tree is adding a folder

it("Can add a new tree to an existing tree", function(){

var test = this;

//get latest commit

return test.repo.getHeadCommit()

//get tree of commit

.then(function(commit){ return commit.getTree(); })

//make treebuilder from tree

.then(function(tree){ return Git.Treebuilder.create(test.repo, tree); })

//verify treebuilder can do stuff

.then(function(rootTreeBuilder){

//new dir builder

return Git.Treebuilder.create(test.repo, null)

.then(function(newTreeBuilder){

//insert new dir

return rootTreeBuilder.insert(

"mynewfolder",

newTreeBuilder.write(),

Git.TreeEntry.FILEMODE.TREE

);

});

})

.then(function(newTreeEntry){

assert(newTreeEntry.isTree(),

"Created a tree (new folder) that is a tree");

return Git.Tree.lookup(test.repo, newTreeEntry.oid());

});

});

});