Update: Add test from gulp-sourcemaps/gulp-sourcemaps#157

Author: phated

test/write.js

@@ -461,4 +461,12 @@ describe('write', function() {
 			done(err);
 		});
 	});
+
+	it('should create shortest path to file in sourceMap#file', function(done) {
+		var file = makeNestedFile();
+		sourcemaps.write(file, { path: 'dir1/maps' }, function(err, updatedFile) {
+			expect(updatedFile.sourceMap.file).toEqual('../../../dir2/helloworld.js');
+			done(err);
+		});
+	});
 });