Merge pull request #429 from bem/BEM-930

Add ability to write tech module as a function (closes #363, BEM-930)

lib/tech/index.js

@@ -6,17 +6,26 @@ var TechV1 = exports.Tech = require('./v1').Tech,
     Q = require('q'),
     U = require('../util'),
 
+    BEM,
+    getBem = function() {
+        if (!BEM) BEM = require('../..');
+
+        return BEM;
+    };
     /**
      * Return tech class for the tech module path.
      *
      * @param {String|Object} module  Path to tech module or module object.
      * @param {Level} [level]  Level object to resolve techs by name.
      * @returns {Tech}  Tech class.
      */
-    getTechClass = exports.getTechClass = function(module, level) {
+    var getTechClass = exports.getTechClass = function(module, level) {
+
+        var tech = typeof module === 'string'? require(module) : module;
+
+        if (typeof tech === 'function') tech = tech(getBem());
 
-        var tech = typeof module === 'string'? require(module) : module,
-            TechClass = tech.API_VER > 1 ? TechV2 : TechV1;
+        var TechClass = tech.API_VER > 1 ? TechV2 : TechV1;
 
         // link to tech class found in Tech property
         if (tech.Tech) return tech.Tech;

test/data/techs/function-tech.js

@@ -0,0 +1,11 @@
+'use strict';
+
+module.exports = function(BEM) {
+    return {
+        techMixin: {
+            getBuildResults: function() {
+                return BEM.require.resolve('./techs/js');
+            }
+        }
+    };
+};

test/tech.js

@@ -125,6 +125,12 @@ describe('tech', function() {
 
         });
 
+        it('for module with function-style code', function() {
+            var T = getTechClass(require.resolve('./data/techs/function-tech.js'));
+            T = new T('function-tech', 'function-tech');
+            assert.equal(T.getBuildResults(), BEM.require.resolve('./techs/js.js'));
+        });
+
     });
 
     describe('v2', function() {