New: Support displayName property on anonymous functions (ref gulpjs/gulp#858)

Author: phated

lib/helpers/buildTree.js

@@ -11,7 +11,7 @@ function buildTree(tasks){
       return meta.tree;
     }
 
-    var name = task.name || '<anonymous>';
+    var name = task.name || task.displayName || '<anonymous>';
     meta = {
       name: name,
       tree: {

lib/task.js

@@ -4,7 +4,7 @@ function task(name, fn){
   /* jshint validthis: true */
   if(typeof name === 'function'){
     fn = name;
-    name = fn.name;
+    name = fn.name || fn.displayName;
   }
 
   if(!fn){

test/fixtures/taskTree/simple.js

@@ -8,5 +8,6 @@ module.exports = [
   'ser',
   'par',
   'serpar',
-  'serpar2'
+  'serpar2',
+  '<display name>'
 ];

test/task.js

@@ -36,6 +36,14 @@ describe('task', function(){
     done();
   });
 
+  it('should register an anonymous function by displayName property', function(done){
+    anon.displayName = '<display name>';
+    taker.task(anon);
+    expect(taker.task('<display name>')).to.equal(anon);
+    delete anon.displayName;
+    done();
+  });
+
   it('should throw on register an anonymous function without string name', function(done){
     function noName(){
       taker.task(anon);

test/tree.js

@@ -35,11 +35,13 @@ describe('tree', function(){
     var anon = function(cb){
       cb();
     };
+    anon.displayName = '<display name>';
 
     taker.task('ser', taker.series('test1', 'test2'));
     taker.task('par', taker.parallel('test1', 'test2', 'test3'));
     taker.task('serpar', taker.series('ser', 'par'));
     taker.task('serpar2', taker.series(ser, anon));
+    taker.task(anon);
 
     var tree = taker.tree();