public function activateRulesetActivatesTheGivenRuleset()
{
$provider = Mockery::mock('\\Cocur\\Slugify\\RuleProvider\\RuleProviderInterface');
$provider->shouldReceive('getRules')->with('esperanto')->once()->andReturn(['ĉ' => 'cx']);
$slugify = new Slugify(['rulesets' => []], $provider);
$this->assertInstanceOf('Cocur\\Slugify\\Slugify', $slugify->activateRuleset('esperanto'));
$this->assertEquals('sercxi', $slugify->slugify('serĉi'));
}