public function testMerge()
{
$packageFile1 = new PackageFile('vendor/package1');
$package1 = new Package($packageFile1, '/path1');
$packageFile2 = new PackageFile('vendor/package2');
$package2 = new Package($packageFile2, '/path2');
$packageFile3 = new PackageFile('vendor/package3');
$package3 = new Package($packageFile3, '/path3');
$this->collection->add($package1);
$this->collection->merge(array($package2, $package3));
$this->assertSame(array('vendor/package1' => $package1, 'vendor/package2' => $package2, 'vendor/package3' => $package3), $this->collection->toArray());
}
