/** @test */ public function testIsCollection() { $this->assertTrue(IterUtil::isCollection(array())); $this->assertTrue(IterUtil::isCollection(new RangeIterator(1, 2))); $this->assertTrue(IterUtil::isCollection(new Queue())); $this->assertTrue(IterUtil::isCollection(new SimpleXMLElement('<root/>'))); $this->assertFalse(IterUtil::isCollection(1)); }