Add test case for exclude. Relates to gruntjs#65.

Gruntfile.js

@@ -28,7 +28,8 @@ module.exports = function(grunt) {
       shortPathTest: ['tmp/sample_short'],
       longPathTest: {
         src: ['tmp/sample_long']
-      }
+      },
+      exclude: ['tmp/end_01/**/*', '!tmp/end_01/1.txt']
     },
 
     // Unit tests.
@@ -49,6 +50,13 @@ module.exports = function(grunt) {
   grunt.registerTask('copy', 'Copy fixtures to a temp location.', function() {
     grunt.file.copy('test/fixtures/sample_long/long.txt', 'tmp/sample_long/long.txt');
     grunt.file.copy('test/fixtures/sample_short/short.txt', 'tmp/sample_short/short.txt');
+    var cwd = 'test/fixtures/start';
+    grunt.file.expand({
+      cwd: cwd
+    }, '**/*')
+    .forEach(function (file) {
+      grunt.file.copy(cwd + '/' + file, 'tmp/end_01/' + file);
+    });
   });
 
   // Whenever the 'test' task is run, first create some files to be cleaned,

package.json

@@ -18,6 +18,7 @@
     "rimraf": "^2.2.1"
   },
   "devDependencies": {
+    "dir-compare": "0.0.2",
     "grunt": "^0.4.5",
     "grunt-cli": "^0.1.13",
     "grunt-contrib-internal": "^0.4.10",

test/clean_test.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var grunt = require('grunt');
+var dircompare = require('dir-compare');
 
 exports.clean = {
   shortPathTest: function(test) {
@@ -17,6 +18,11 @@ exports.clean = {
     var expected = grunt.file.exists('tmp/sample_long');
     test.equal(expected, false, 'should remove the long directory using clean');
 
+    test.done();
+  },
+  exclude: function (test) {
+    var res = dircompare.compareSync('test/expected/end_01', 'tmp/end_01');
+    test.equal(true, res.equal, 'should match exclusions');
     test.done();
   }
 };