Update: Add integration test for async-once usage coupled with bach

Author: phated

package.json

@@ -22,7 +22,9 @@
   },
   "homepage": "https://github.com/phated/undertaker",
   "devDependencies": {
+    "async-once": "^1.0.0",
     "code": "^1.2.1",
+    "del": "^1.1.1",
     "gulp-jshint": "^1.8.4",
     "lab": "^5.2.0",
     "once": "^1.3.1",

test/integration.js

@@ -14,6 +14,8 @@ var vinyl = require('vinyl-fs');
 var jshint = require('gulp-jshint');
 var spawn = require('child_process').spawn;
 var once = require('once');
+var aOnce = require('async-once');
+var del = require('del');
 var promisedDel = require('promised-del');
 var through = require('through2');
 
@@ -83,6 +85,28 @@ describe('integrations', function() {
     });
   });
 
+  it('should run dependencies once', function(done) {
+    var count = 0;
+
+    taker.task('clean', aOnce(function(cb) {
+      console.log(cb());
+      count++;
+      del(['./fixtures/some-build.txt'], {cwd: __dirname}, cb);
+    }));
+
+    taker.task('build-this', taker.series(['clean', function(done){done();}]));
+    taker.task('build-that', taker.series(['clean', function(done){done();}]));
+    taker.task('build', taker.series([
+      'clean',
+      taker.parallel(['build-this', 'build-that'])
+    ]));
+
+    taker.parallel('build')(function(err){
+      expect(count).to.equal(1);
+      done(err);
+    });
+  });
+
   it('can use lastRun with vinyl.src `since` option', function(done){
     taker.task('test', function () {
       return vinyl.src('./fixtures/test.js', {cwd: __dirname })