minor symfony#61094 [Routing] Add test to validate that default value is allowed to not match requirement (tcoch)

This PR was squashed before being merged into the 6.4 branch.

Discussion
----------

[Routing] Add test to validate that default value is allowed to not match requirement

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Issues        | symfony#61022
| License       | MIT

Suppose you have this route definition:
```php
$route = new Route('/test/{foo}', ['foo' => 'foo-'], ['foo' => '\w+'], []);
```

With this route definition:

- `/test/foo` works
- `/test/foo-` fails, because the dash is not permitted by the requirement
- `/test` works, thanks to the default value. However, the value of the parameter `foo` does not meet the requirement.

Commits
-------

f6e91fd [Routing] Add test to validate that default value is allowed to not match requirement

Author: nicolas-grekas

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

@@ -982,6 +982,30 @@ public function testUtf8VarName()
         $this->assertEquals(['_route' => 'foo', 'bär' => 'baz', 'bäz' => 'foo'], $matcher->match('/foo/baz'));
     }
 
+    public function testParameterWithRequirementWithDefault()
+    {
+        $collection = new RouteCollection();
+
+        $route = new Route('/test/{foo}', ['foo' => 'foo-'], ['foo' => '\w+']);
+        $collection->add('test', $route);
+
+        $matcher = $this->getUrlMatcher($collection);
+
+        $result = $matcher->match('/test/foo');
+        $this->assertSame('test', $result['_route']);
+        $this->assertSame('foo', $result['foo']);
+
+        try {
+            $matcher->match('/test/foo-');
+        } catch (ResourceNotFoundException $e) {
+            $this->assertStringContainsString('No routes found', $e->getMessage());
+        }
+
+        $result = $matcher->match('/test');
+        $this->assertSame('test', $result['_route']);
+        $this->assertSame('foo-', $result['foo']);
+    }
+
     protected function getUrlMatcher(RouteCollection $routes, ?RequestContext $context = null)
     {
         return new UrlMatcher($routes, $context ?? new RequestContext());