fixed route regex when the pattern is only made of optional segments

Author: fabpot

src/Symfony/Component/Routing/RouteCompiler.php

@@ -114,7 +114,7 @@ private function computeRegexp(array $tokens, $index, $firstOptional)
             return preg_quote($token[1], self::REGEX_DELIMITER);
         } else {
             // Variable tokens
-            if (0 === $index && 0 === $firstOptional && 1 == count($tokens)) {
+            if (0 === $index && 0 === $firstOptional) {
                 // When the only token is an optional variable token, the separator is required
                 return sprintf('%s(?<%s>%s)?', preg_quote($token[1], self::REGEX_DELIMITER), $token[3], $token[2]);
             } else {
@@ -127,7 +127,7 @@ private function computeRegexp(array $tokens, $index, $firstOptional)
                     $nbTokens = count($tokens);
                     if ($nbTokens - 1 == $index) {
                         // Close the optional subpatterns
-                        $regexp .= str_repeat(")?", $nbTokens - $firstOptional);
+                        $regexp .= str_repeat(")?", $nbTokens - $firstOptional - (0 === $firstOptional ? 1 : 0));
                     }
                 }
 

src/Symfony/Component/Routing/Tests/Matcher/UrlMatcherTest.php

@@ -118,6 +118,14 @@ public function testMatch()
         $matcher = new UrlMatcher($collection, new RequestContext(), array());
         $this->assertEquals(array('_route' => 'bar', 'bar' => 'foo'), $matcher->match('/foo'));
         $this->assertEquals(array('_route' => 'bar', 'bar' => 'bar'), $matcher->match('/'));
+
+        // route with only optional variables
+        $collection = new RouteCollection();
+        $collection->add('bar', new Route('/{foo}/{bar}', array('foo' => 'foo', 'bar' => 'bar'), array()));
+        $matcher = new UrlMatcher($collection, new RequestContext(), array());
+        $this->assertEquals(array('_route' => 'bar', 'foo' => 'foo', 'bar' => 'bar'), $matcher->match('/'));
+        $this->assertEquals(array('_route' => 'bar', 'foo' => 'a', 'bar' => 'bar'), $matcher->match('/a'));
+        $this->assertEquals(array('_route' => 'bar', 'foo' => 'a', 'bar' => 'b'), $matcher->match('/a/b'));
     }
 
     public function testMatchWithPrefixes()

src/Symfony/Component/Routing/Tests/RouteCompilerTest.php

@@ -97,6 +97,14 @@ public function provideCompileData()
                     array('variable', '/', '(foo|bar)', 'bar'),
                 )),
 
+            array(
+                'Route with only optional variables',
+                array('/{foo}/{bar}', array('foo' => 'foo', 'bar' => 'bar')),
+                '', '#^/(?<foo>[^/]+)?(?:/(?<bar>[^/]+))?$#s', array('foo', 'bar'), array(
+                    array('variable', '/', '[^/]+', 'bar'),
+                    array('variable', '/', '[^/]+', 'foo'),
+                )),
+
             array(
                 'Route with a variable in last position',
                 array('/foo-{bar}'),