From 9346d4a501edaa9eb1217fafd08944d197ea37c9 Mon Sep 17 00:00:00 2001
From: Nils Adermann <naderman@naderman.de>
Date: Sun, 1 Jul 2012 18:41:58 +0200
Subject: [PATCH] Make the InstallationManagerMock behave like the real class
 on alias install

---
 tests/Composer/Test/Mock/InstallationManagerMock.php | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tests/Composer/Test/Mock/InstallationManagerMock.php b/tests/Composer/Test/Mock/InstallationManagerMock.php
index 4bccc63f8..b643df728 100644
--- a/tests/Composer/Test/Mock/InstallationManagerMock.php
+++ b/tests/Composer/Test/Mock/InstallationManagerMock.php
@@ -56,9 +56,14 @@ class InstallationManagerMock extends InstallationManager
 
     public function markAliasInstalled(RepositoryInterface $repo, MarkAliasInstalledOperation $operation)
     {
-        $this->installed[] = $operation->getPackage();
+        $package = $operation->getPackage();
+
+        $this->installed[] = $package;
         $this->trace[] = (string) $operation;
-        $repo->addPackage(clone $operation->getPackage());
+
+        if (!$repo->hasPackage($package)) {
+            $repo->addPackage($package);
+        }
     }
 
     public function markAliasUninstalled(RepositoryInterface $repo, MarkAliasUninstalledOperation $operation)