var assert = require("assert");

var path = require("path");

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

var fse = promisify(require("fs-extra"));

var Diff = require("../../lib/diff");

var normalizeOptions = require("../../lib/util/normalize_options");

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

describe("Diff", function() {

var Repository = require("../../lib/repository");

var reposPath = path.resolve("test/repos/workdir/.git");

var oid = "fce88902e66c72b5b93e75bdb5ae717038b221f6";

var diffFilename = "wddiff.txt";

var diffFilepath = path.join(

path.resolve("test/repos/workdir"),

diffFilename

);

before(function() {

var test = this;

return Repository.open(reposPath).then(function(repository) {

test.repository = repository;

return repository.getBranchCommit("master");

})

.then(function(masterCommit) {

return masterCommit.getTree();

})

.then(function(tree) {

test.masterCommitTree = tree;

return test.repository.getCommit(oid);

})

.then(function(commit) {

test.commit = commit;

return commit.getDiff();

}).then(function(diff) {

test.diff = diff;

return fse.writeFile(diffFilepath, "1 line\n2 line\n3 line\n\n4");

})

.then(function() {

return Diff.treeToWorkdirWithIndex(

test.repository,

test.masterCommitTree,

normalizeOptions({

flags: Diff.OPTION.INCLUDE_UNTRACKED

}, NodeGit.DiffOptions)

);

})

.then(function(workdirDiff) {

test.workdirDiff = workdirDiff;

});

});

after(function(done) {

return fse.unlink(diffFilepath).then(function() {

done();

});

});

it("can walk a DiffList", function() {

var patch = this.diff[0].patches()[0];

assert.equal(patch.oldFile().path(), "README.md");

assert.equal(patch.newFile().path(), "README.md");

assert.equal(patch.size(), 1);

assert.ok(patch.isModified());

var hunk = patch.hunks()[0];

assert.equal(hunk.size(), 5);

var lines = hunk.lines();

assert.equal(lines[0].origin(), Diff.LINE.CONTEXT);

assert.equal(lines[1].origin(), Diff.LINE.CONTEXT);

assert.equal(lines[2].origin(), Diff.LINE.CONTEXT);

var oldContent = "__Before submitting a pull request, please ensure " +

"both unit tests and lint checks pass.__\n";

assert.equal(lines[3].content(), oldContent);

assert.equal(lines[3].origin(), Diff.LINE.DELETION);

assert.equal(lines[3].contentLen(), 90);

var newContent = "__Before submitting a pull request, please ensure " +

"both that you've added unit tests to cover your shiny new code, " +

"and that all unit tests and lint checks pass.__\n";

assert.equal(lines[4].content(), newContent);

assert.equal(lines[4].origin(), Diff.LINE.ADDITION);

assert.equal(lines[4].contentLen(), 162);

});

it("can diff the workdir with index", function() {

var patches = this.workdirDiff.patches();

assert.equal(patches.length, 1);

assert(patches[0].isUntracked());

var oldFile = patches[0].delta.oldFile();

assert.equal(oldFile.path(), "wddiff.txt");

assert.equal(oldFile.size(), 0);

var newFile = patches[0].delta.newFile();

assert.equal(newFile.path(), "wddiff.txt");

assert.equal(newFile.size(), 23);

});

it("can diff with a null tree", function() {

var repo = this.repository;

var tree = this.masterCommitTree;

return Diff.treeToTree(repo, null, tree, null).then(function(diff) {

assert.equal(diff.patches().length, 85);

});

});

it("can diff the initial commit of a repository", function() {

var repo = this.repository;

var oid = "99c88fd2ac9c5e385bd1fe119d89c83dce326219"; // First commit

return repo.getCommit(oid).then(function(commit) {

return commit.getDiff().then(function(diffs) {

assert.equal(diffs[0].patches().length, 8);

});

});

});

});