Updates to accommodate naturalatlas/tilestrata#21

Should have done this the 2.1.0 release, but it slipped my mind.

index.js

@@ -21,7 +21,13 @@ module.exports = function() {
 
 			mock.method = 'GET';
 			mock.layer = source[0];
-			mock.filename = source[1];
+			if (source[1].charAt(0) === '*') {
+				mock.filename = 't' + source[1].substring(1);
+				mock.hasFilename = false;
+			} else {
+				mock.filename = source[1];
+				mock.hasFilename = true;
+			}
 			mock.headers = {};
 			if (req.headers['x-tilestrata-skipcache']) {
 				mock.headers['x-tilestrata-skipcache'] = req.headers['x-tilestrata-skipcache'];

test/index.js

@@ -32,13 +32,31 @@ describe('Provider Implementation "dependency"', function() {
 			var provider = dependency('basemap', 'tile.txt');
 			var req = TileRequest.parse('/layer/3/2/1/tile.txt', {'x-tilestrata-skipcache':'basemap/tile.txt','x-random':'1'}, 'HEAD');
 			provider.serve(server, req, function(err, buffer, headers) {
-				assert.isFalse(!!err);
+				if (err) throw err;
 				assert.instanceOf(buffer, Buffer);
 				assert.equal(buffer.toString('utf8'), 'Test dependency');
 				assert.equal(headers['X-Test'], 'header');
 				done();
 			});
 		});
+		it('should fetch and return dependency (no filename)', function(done) {
+			var server = new TileServer();
+			server.layer('basemap').route('*@2x.png').use({
+				serve: function(server, req, callback) {
+					assert.equal(req.filename, '[email protected]', 'req.filename');
+					assert.isFalse(req.hasFilename, 'req.hasFilename');
+					callback(null, new Buffer('Test dependency', 'utf8'), {});
+				}
+			});
+
+			var provider = dependency('basemap', '*@2x.png');
+			var req = TileRequest.parse('/layer/3/2/1.png', {}, 'GET');
+			provider.serve(server, req, function(err, buffer, headers) {
+				if (err) throw err;
+				assert.equal(buffer.toString('utf8'), 'Test dependency');
+				done();
+			});
+		});
 		it('should allow dynamic source via function', function(done) {
 			var server = new TileServer();
 			server.layer('basemap').route('tile.txt').use({