Ergo\Tests\Http\UrlTest::testGetUrlForMergedParameters PHP Method

    public function testGetUrlForMergedParameters()
    {
        // url without a fragment currently
        $url = new Http\Url('http://example.org/?key1=val1&key2=val2&key3=&');
        $newurl = $url->getUrlForMergedParameters(array("key2" => "XXX", "key4" => "val4"));
        $this->assertEquals('http://example.org/?key1=val1&key2=XXX&key3=&key4=val4', (string) $newurl);
    }