public function testMergingTwoFilterChainsKeepFiltersPriority()
{
$value = 'AbC';
$valueExpected = 'abc';
$chain = new FilterChain();
$chain->attach(new StripUpperCase())->attach(new LowerCase(), 1001);
$this->assertEquals($valueExpected, $chain->filter($value));
$chain = new FilterChain();
$chain->attach(new LowerCase(), 1001)->attach(new StripUpperCase());
$this->assertEquals($valueExpected, $chain->filter($value));
$chain = new FilterChain();
$chain->attach(new LowerCase(), 1001);
$chainToMerge = new FilterChain();
$chainToMerge->attach(new StripUpperCase());
$chain->merge($chainToMerge);
$this->assertEquals(2, $chain->count());
$this->assertEquals($valueExpected, $chain->filter($value));
$chain = new FilterChain();
$chain->attach(new StripUpperCase());
$chainToMerge = new FilterChain();
$chainToMerge->attach(new LowerCase(), 1001);
$chain->merge($chainToMerge);
$this->assertEquals(2, $chain->count());
$this->assertEquals($valueExpected, $chain->filter($value));
}
