[Security] Fixed auth provider authenticate() cannot return void

The AuthenticationManagerInterface requires that authenticate() must return a TokenInterface, never null.
Several authentication providers are violating this. Changed to throw exception instead.

src/Symfony/Component/Security/Core/Authentication/Provider/AnonymousAuthenticationProvider.php

@@ -12,6 +12,7 @@
 namespace Symfony\Component\Security\Core\Authentication\Provider;
 
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
+use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Core\Exception\BadCredentialsException;
 use Symfony\Component\Security\Core\Authentication\Token\AnonymousToken;
 
@@ -38,7 +39,7 @@ class AnonymousAuthenticationProvider implements AuthenticationProviderInterface
     public function authenticate(TokenInterface $token)
     {
         if (!$this->supports($token)) {
-            return;
+            throw new AuthenticationException('The token is not supported by this authentication provider.');
         }
 
         if ($this->key !== $token->getKey()) {

src/Symfony/Component/Security/Core/Authentication/Provider/PreAuthenticatedAuthenticationProvider.php

@@ -13,6 +13,7 @@ namespace Symfony\Component\Security\Core\Authentication\Provider;
 
 use Symfony\Component\Security\Core\User\UserProviderInterface;
 use Symfony\Component\Security\Core\User\UserCheckerInterface;
+use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Core\Exception\BadCredentialsException;
 use Symfony\Component\Security\Core\Authentication\Token\PreAuthenticatedToken;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
@@ -51,7 +52,7 @@ class PreAuthenticatedAuthenticationProvider implements AuthenticationProviderIn
     public function authenticate(TokenInterface $token)
     {
         if (!$this->supports($token)) {
-            return;
+            throw new AuthenticationException('The token is not supported by this authentication provider.');
         }
 
         if (!$user = $token->getUser()) {

src/Symfony/Component/Security/Core/Authentication/Provider/RememberMeAuthenticationProvider.php

@@ -14,6 +14,7 @@ namespace Symfony\Component\Security\Core\Authentication\Provider;
 use Symfony\Component\Security\Core\User\UserCheckerInterface;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
 use Symfony\Component\Security\Core\Authentication\Token\RememberMeToken;
+use Symfony\Component\Security\Core\Exception\AuthenticationException;
 use Symfony\Component\Security\Core\Exception\BadCredentialsException;
 
 class RememberMeAuthenticationProvider implements AuthenticationProviderInterface
@@ -40,7 +41,7 @@ class RememberMeAuthenticationProvider implements AuthenticationProviderInterfac
     public function authenticate(TokenInterface $token)
     {
         if (!$this->supports($token)) {
-            return;
+            throw new AuthenticationException('The token is not supported by this authentication provider.');
         }
 
         if ($this->key !== $token->getKey()) {

src/Symfony/Component/Security/Core/Authentication/Provider/UserAuthenticationProvider.php

@@ -56,7 +56,7 @@ abstract class UserAuthenticationProvider implements AuthenticationProviderInter
     public function authenticate(TokenInterface $token)
     {
         if (!$this->supports($token)) {
-            return;
+            throw new AuthenticationException('The token is not supported by this authentication provider.');
         }
 
         $username = $token->getUsername();

src/Symfony/Component/Security/Core/Tests/Authentication/Provider/AnonymousAuthenticationProviderTest.php

@@ -24,11 +24,15 @@ class AnonymousAuthenticationProviderTest extends TestCase
         $this->assertFalse($provider->supports($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock()));
     }
 
+    /**
+     * @expectedException \Symfony\Component\Security\Core\Exception\AuthenticationException
+     * @expectedExceptionMessage The token is not supported by this authentication provider.
+     */
     public function testAuthenticateWhenTokenIsNotSupported()
     {
         $provider = $this->getProvider('foo');
 
-        $this->assertNull($provider->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock()));
+        $provider->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
     }
 
     /**

src/Symfony/Component/Security/Core/Tests/Authentication/Provider/PreAuthenticatedAuthenticationProviderTest.php

@@ -36,11 +36,15 @@ class PreAuthenticatedAuthenticationProviderTest extends TestCase
         $this->assertFalse($provider->supports($token));
     }
 
+    /**
+     * @expectedException \Symfony\Component\Security\Core\Exception\AuthenticationException
+     * @expectedExceptionMessage The token is not supported by this authentication provider.
+     */
     public function testAuthenticateWhenTokenIsNotSupported()
     {
         $provider = $this->getProvider();
 
-        $this->assertNull($provider->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock()));
+        $provider->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
     }
 
     /**

src/Symfony/Component/Security/Core/Tests/Authentication/Provider/RememberMeAuthenticationProviderTest.php

@@ -26,12 +26,16 @@ class RememberMeAuthenticationProviderTest extends TestCase
         $this->assertFalse($provider->supports($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock()));
     }
 
+    /**
+     * @expectedException \Symfony\Component\Security\Core\Exception\AuthenticationException
+     * @expectedExceptionMessage The token is not supported by this authentication provider.
+     */
     public function testAuthenticateWhenTokenIsNotSupported()
     {
         $provider = $this->getProvider();
 
         $token = $this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock();
-        $this->assertNull($provider->authenticate($token));
+        $provider->authenticate($token);
     }
 
     /**

src/Symfony/Component/Security/Core/Tests/Authentication/Provider/UserAuthenticationProviderTest.php

@@ -29,11 +29,15 @@ class UserAuthenticationProviderTest extends TestCase
         $this->assertFalse($provider->supports($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock()));
     }
 
+    /**
+     * @expectedException \Symfony\Component\Security\Core\Exception\AuthenticationException
+     * @expectedExceptionMessage The token is not supported by this authentication provider.
+     */
     public function testAuthenticateWhenTokenIsNotSupported()
     {
         $provider = $this->getProvider();
 
-        $this->assertNull($provider->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock()));
+        $provider->authenticate($this->getMockBuilder('Symfony\Component\Security\Core\Authentication\Token\TokenInterface')->getMock());
     }
 
     /**