public function testChaining()
{
$expected = new MutableMap('FOO');
$list = new MutableMap('foo', 'bar');
$filter = function ($value) {
if (strtolower($value) == 'foo') {
return true;
}
};
$list->map(function ($value) {
return strtoupper($value);
});
$this->assertEquals($expected->all(), $list->filter($filter)->all());
}
