/**
* Make sure that the ::merge() method does not modify any input objects
*
* This performs two checks:
* 1. That the result object is *not* the same object as any of the input ones
* 2. That the method doesn't modify the input objects
*
*/
public function testMergeTwoObjectsNotModifying()
{
$base = new Uri('http://example.com/bar');
$ref = new Uri('baz?qwe=1');
$baseSig = serialize($base);
$refSig = serialize($ref);
$actual = Uri::merge($base, $ref);
$this->assertNotSame($base, $actual);
$this->assertNotSame($ref, $actual);
$this->assertEquals($baseSig, serialize($base));
$this->assertEquals($refSig, serialize($ref));
}