ChunkIterator: last chunk item will be used two times.

[stevleibelt]

If you have chunks like this:

1-10
10-20
20-30

The last chunk id of the previous chunk will be used two times (10, 20 and so one).

note: reported originally by dirkwinkhause.

[stevleibelt]

I can confirm this issue with the following phpunit test.

    public function testThatNoChunkIsEverProcessedMoreThanOnce()
    {
        $chunkIterator      = $this->getNewCollectionChunkIterator();
        $expectedChunks     = array(
            0 => array(0, 9),
            1 => array(10, 19),
            2 => array(20, 29),
            3 => array(30, 30)
        );

        $chunkIterator->initialize(30, 0, 10);

        foreach ($chunkIterator as $index => $chunk) {
            $expectedMaximum    = $expectedChunks[$index][1];
            $expectedMinimum    = $expectedChunks[$index][0];

            $this->assertEquals($expectedMaximum, $chunk->maximum());
            $this->assertEquals($expectedMinimum, $chunk->minimum());
        }
    }

[stevleibelt]

Fixed in commit 72bd9c1 and in the upcoming release 1.10.0.