Fixed code to use the correct relative path wrt the current working d…

…irectory.

index.js

@@ -1,6 +1,7 @@
 'use strict';
 var gutil = require('gulp-util');
 var multimatch = require('multimatch');
+var path = require('path');
 var streamfilter = require('streamfilter');
 
 module.exports = function (pattern, options) {
@@ -13,7 +14,7 @@ module.exports = function (pattern, options) {
 
 	return streamfilter(function (file, enc, cb) {
 		var match = typeof pattern === 'function' ? pattern(file) :
-			multimatch(file.relative, pattern, options).length > 0;
+			multimatch(path.relative(file.cwd, file.path), pattern, options).length > 0;
 
 		cb(!match);
 	}, {

test.js

@@ -131,6 +131,34 @@ describe('filter()', function () {
 		stream.write(new gutil.File({path: 'app.js'}));
 		stream.end();
 	});
+
+	it('should filter with respect to current working directory', function (cb) {
+		var stream = filter('test/**/*.js');
+		var buffer = [];
+
+		stream.on('data', function (file) {
+			buffer.push(file);
+		});
+
+		stream.on('end', function () {
+			assert.equal(buffer.length, 1);
+			assert.equal(buffer[0].relative, 'included.js');
+			cb();
+		});
+
+		// mimic gulp.src('test/**/*.js')
+		stream.write(new gutil.File({
+			base: path.join(__dirname, 'test'),
+			path: path.join(__dirname, 'test', 'included.js')
+		}));
+
+		stream.write(new gutil.File({
+			base: __dirname,
+			path: path.join(__dirname, 'ignored.js')
+		}));
+
+		stream.end();
+	});
 });
 
 describe('filter.restore', function () {