PHPUnit 3.7.8 same object with SplObjectStorage

DemoTest.php

<?php

class DemoTest extends PHPUnit_Framework_TestCase
{
    public function testDemo()
    {
        $entry = $this->getMock('stdClass');
        $list = $this->getMock('stdClass');
        $listEntry = $this->getMock('stdClass');
        $listEntryData = $this->getMock('stdClass');

        $storage = $this->getMock('SplObjectStorage');
        $storage
            ->expects($this->at(0))
            ->method('contains')
            ->with($this->identicalTo($entry))
            ->will($this->returnValue(true))
        ;
        $storage
            ->expects($this->at(1))
            ->method('offsetGet')
            ->with($this->identicalTo($entry))
            ->will($this->returnValue($list))
        ;
        $storage
            ->expects($this->at(2))
            ->method('detach')
            ->with($this->identicalTo($entry))
        ;
        $this->expectIterator($storage, array($listEntry), false, 3);
        // offsetGet within foreach
        $storage
            ->expects($this->any())
            ->method('offsetGet')
            ->with($this->identicalTo($listEntry))
            ->will($this->returnValue($listEntryData))
        ;

        // Executing code

        if (!$storage->contains($entry)) {
            throw InvalidArgumentException();
        }

        $data = $storage[$entry];

        $storage->detach($entry);

        foreach ($storage as $eachList) {
            $listData = $storage[$eachList];
        }

    }

    /**
     * @link https://gist.github.com/2852498
     */
    public function expectIterator($mock, array $content, $withKey = false, $counter = 0)
    {
        $mock
            ->expects($this->at($counter))
            ->method('rewind')
        ;

        foreach ($content as $key => $value) {
            $mock
                ->expects($this->at(++$counter))
                ->method('valid')
                ->will($this->returnValue(true))
            ;

            $mock
                ->expects($this->at(++$counter))
                ->method('current')
                ->will($this->returnValue($value))
            ;

            if ($withKey) {
                $mock
                    ->expects($this->at(++$counter))
                    ->method('key')
                    ->will($this->returnValue($key))
                ;
            }

            $mock
                ->expects($this->at(++$counter))
                ->method('next')
            ;
        }

        $mock
            ->expects($this->at(++$counter))
            ->method('valid')
            ->will($this->returnValue(false))
        ;

        return ++$counter;
    }
}

with_identicalTo.txt

 /tmp phpunit DemoTest.php                                                                   /tmp
PHPUnit 3.7.8 by Sebastian Bergmann.

F

Time: 0 seconds, Memory: 6.50Mb

There was 1 failure:

1) DemoTest::testDemo
Expectation failed for method name is equal to <string:offsetGet> when invoked zero or more times
Parameter 0 for invocation SplObjectStorage::offsetGet(Mock_stdClass_73daadc9 Object (...)) does not match expected value.
Failed asserting that two variables reference the same object.

/private/tmp/DemoTest.php:47

FAILURES!
Tests: 1, Assertions: 0, Failures: 1.

without_identicalTo.txt

 /tmp phpunit DemoTest.php                                                                   /tmp
PHPUnit 3.7.8 by Sebastian Bergmann.

F

Time: 0 seconds, Memory: 6.50Mb

There was 1 failure:

1) DemoTest::testDemo
Expectation failed for method name is equal to <string:offsetGet> when invoked zero or more times
Parameter 0 for invocation SplObjectStorage::offsetGet(Mock_stdClass_353e7bf8 Object (...)) does not match expected value.
Failed asserting that two objects are equal.
--- Expected
+++ Actual
@@ @@
 Mock_stdClass_353e7bf8 Object (
-    '__phpunit_id' => 'Mock_stdClass_353e7bf8#2'
+    '__phpunit_id' => 'Mock_stdClass_353e7bf8#0'
 )

/private/tmp/DemoTest.php:45

FAILURES!
Tests: 1, Assertions: 0, Failures: 1.