Added test for amd resolver and alternate fs.

- This won't pass until
dependents/node-module-lookup-amd#26 is merged
and node-module-lookup dep is updated

Author: dazinator

index.js

@@ -166,7 +166,8 @@ function jsLookup({dependency, filename, directory, config, webpackConfig, confi
         configPath: configPath,
         partial: dependency,
         directory: directory,
-        filename: filename
+        filename: filename,
+        fileSystem: fileSystem
       });
 
     case 'commonjs':

test/mockedJSFiles.js

@@ -24,7 +24,8 @@ module.exports = {
     },
     'amd': {
       'foo.js': 'define(["./bar"], function(bar){ return bar; });',
-      'bar.js': 'define({});'
+      'bar.js': 'define({});',
+      'config.js': '{};'
     },
     'commonjs': {
       'foo.js': 'var bar = require("./bar");',

test/test.js

@@ -207,6 +207,35 @@ describe('filing-cabinet', function() {
         revert();
       });
 
+      it('uses the amd resolver with alternative fs', function() {
+        mock.restore();
+        const volumeDir = 'app';
+        const unionfs = require('unionfs');
+        const memfs = require('memfs');
+
+        // mount files specified by "mockedFiles.js.ts" to "app" base directory.
+        var vol = memfs.Volume.fromJSON(mockedFiles.js.es6, `${volumeDir}`);
+        var ufs = unionfs.ufs.use(vol);
+        const result = cabinet({
+          partial: './bar',
+          filename: 'app/foo.js',
+          directory: 'app',
+          config: {
+            baseUrl: './'
+          }
+        });
+
+        // var result = cabinet({
+        //   partial: './bar',
+        //   configPath: 'amd/config.js',
+        //   filename: 'amd/foo.js',
+        //   fileSystem: ufs
+        // });
+
+        assert.equal(result, `${path.join(__dirname, 'amd/bar.js')}`);
+
+      });
+
       it('passes along arguments', function() {
         const stub = sinon.stub();
         const revert = cabinet.__set__('amdLookup', stub);