public function addingEqualPropertiesIsIdempotent()
 {
     $c = new CompositeProperties([(new Properties())->load("[section]\na=b\nb=c")]);
     $this->assertEquals(1, $c->length());
     $c->add((new Properties())->load("[section]\na=b\nb=c"));
     $this->assertEquals(1, $c->length());
 }
    public function addingEqualPropertiesIsIdempotent()
    {
        $c = new CompositeProperties(array(Properties::fromString('[section]
a=b
b=c')));
        $this->assertEquals(1, $c->length());
        $c->add(Properties::fromString('[section]
a=b
b=c'));
        $this->assertEquals(1, $c->length());
    }