/**
* @param Enumerator $collection
* @param callable $add This callable will add an item to $collection.
*/
function doSliceTests(Enumerator $collection, callable $add)
{
$add(0);
$add(1);
$add(2);
$add(3);
$a = $collection->slice(0, 0);
$this->assertCount(0, $a);
$b = $collection->slice(0, 2);
$this->assertCount(2, $b);
$expect = [0, 1];
foreach ($b as $key => $value) {
$this->assertEquals($expect[$key], $value);
}
$c = $collection->slice(1, 2);
$this->assertCount(2, $c);
$expect = [1 => 1, 2 => 2];
foreach ($c as $key => $value) {
$this->assertEquals($expect[$key], $value);
}
$d = $collection->slice(0, 6);
$this->assertCount(4, $d);
$expect = [0, 1, 2, 3];
foreach ($d as $key => $value) {
$this->assertEquals($expect[$key], $value);
}
$e = $collection->slice(4, 1);
$this->assertCount(0, $e);
}
public function testExceptionIsRaisedForInvalidArgument2()
{
$this->setExpectedException(InvalidArgumentException::class);
$this->enumerator->enumerate([], '');
}
