いまこんな感じで書いてます。
FeatureContext.php
<?php

use Behat\Behat\Context\ClosuredContextInterface,
    Behat\Behat\Context\TranslatedContextInterface,
    Behat\Behat\Context\BehatContext,
    Behat\Behat\Exception\PendingException;
use Behat\Gherkin\Node\PyStringNode,
    Behat\Gherkin\Node\TableNode;

use Behat\MinkExtension\Context\MinkDictionary;

use Behat\Mink\Selector\CssSelector,
    Behat\Mink\Selector\NameSelector,
    \Behat\Mink\Selector\SelectorsHandler;
//
// Require 3rd-party libraries here:
//
//   require_once 'PHPUnit/Autoload.php';
//   require_once 'PHPUnit/Framework/Assert/Functions.php';
//

/**
 * Features context.
 */
class FeatureContext extends Behat\MinkExtension\Context\MinkContext
{


    //use MinkDictionary;
    /**
     * Initializes context.
     * Every scenario gets it's own context object.
     *
     * @param array $parameters context parameters (set them up through behat.yml)
     */
    public function __construct(array $parameters)
    {
        // Initialize your context here
    }

    /**
     * @Then /^I wait for the suggestion box to appear$/
     */
    public function iWaitForTheSuggestionBoxToAppear()
    {
        $this->getSession()->wait(5000, "$('.suggestions-results').children().length > 0");
    }

   /**
     * @Given /^I am on "([^"]*)"$/
     */
    // public function iAmOn($arg1)
    // {
    //     // throw new PendingException();
    // }

    /**
     * @When /^I fill in "([^"]*)" with "([^"]*)"$/
     */
    public function iFillInWith($arg1, $arg2)
    {
        // throw new PendingException();
        $this->getSession()->wait(15000);
    }

    /**
     * @Given /^I click "([^"]*)"$/
     */
    public function iClick($arg1)
    {
        // throw new PendingException();
        $this->getSession()->wait(20000);
    }

    /**
     * @Then /^I should see "([^"]*)"$/
     */
    // public function iShouldSee($arg1)
    // {
    //     // throw new PendingException();
    // }
    /**
     * @When /^I click_link "([^"]*)"$/
     */
    public function iClickLink($arg1)
    {
        // throw new PendingException();
    }

    /**
     * @Given /^"ログイン"リンクをクリックする$/
     */
    public function stepDefinition1()
    {
        // throw new PendingException();
    }

    /**
     * @Given /^"([^"]*)" に "([^"]*)" を選択する$/
     */
    public function fang($arg1, $arg2)
    {
        // throw new PendingException();
    }

    /**
     * @Given /^一秒待つ$/
     */
    public function ta()
    {
        // throw new PendingException();
        sleep(1);
    }

    /**
     * @Given /^(\d+)秒待つ$/
     */
    public function ta2($arg1)
    {
        // throw new PendingException();
        sleep($arg1);
    }

    /**
     * @Given /^Ajaxを待つ$/
     */
    public function ajax()
    {
        // throw new PendingException();
        sleep(2);
    }



    /**
     * @Given /^"(.+)"に "(.+)"を選択する$/
     */
    public function radioButtonSelect($arg1, $arg2)
    {
        $radio_button = $this->getSession()->getPage()->find('css', 'input[type=radio][name="'.$arg1.'"][value='.$arg2.']');
        if (null === $radio_button) {
            throw new ElementNotFoundException(
              $this->getSession(), 'form field', 'id|name|label|value', $radio_button
            );
        }
        // $value = $radio_button->getAttribute('value');
        $radio_button->click();
    }
    /**
     * @Given /^"([^"]*)" checkboxを クリックする$/
     */
    public function chekboxClick($arg1)
    {
        $el = $this->getSession()->getPage()->find('css', 'input[type=checkbox][name="'.$arg1.'"]');
        if (null === $el) {
            throw new ElementNotFoundException(
              $this->getSession(), 'form field', 'id|name|label|value', $el
            );
        }
        // $value = $radio_button->getAttribute('value');
        $el->click();
    }

    /**
     * 
     * @Given /^"([^"]*)" の"class:(.+)"リンクをクリックする$/
     */
    public function gotoLinkForClass($arg1,$arg2)
    {
        $elAry = $this->getSession()->getPage()->findAll('css', 'a.'.$arg2);
        if (null === $elAry) {
            throw new ElementNotFoundException(
              $this->getSession(), 'link', 'id|name|label|value', $elAry
            );
        }
        //print_r($el);
        $url = null;
        foreach($elAry as $k => $el){
            $url = $el->getAttribute('href');
            if(preg_match('/'.$arg1.'/',$url)){
                break;
            }   
        }
        if (null === $url) {
            throw new ElementNotFoundException(
              $this->getSession(), 'link', 'id|name|label|value', $url
            );
        }

        //header("Location: ".$url);
        $this->getSession()->visit($url);
        return;
    }

    /**
     * @Given /^"(.+)" から "(.+)"を選択する$/
     */
    public function pulldownSelect($arg1, $arg2)
    {
        // echo $arg1;
        $pulldown = $this->getSession()->getPage()->find('css', 'select[name="'.$arg1.'"]');
        if (null === $pulldown) {
            throw new ElementNotFoundException(
              $this->getSession(), 'form field', 'id|name|label|value', $pulldown
            );
        }
        // $value = $radio_button->getAttribute('value');
        $pulldown->selectOption($arg2);
    }

    /**
     * @Given /^"id:(.+)"のプルダウンで "(.+)"を選択する$/
     */
    public function pulldownSelectForId($arg1, $arg2)
    {
        $pulldown = $this->getSession()->getPage()->findById($arg1);
        if (null === $pulldown) {
            throw new ElementNotFoundException(
              $this->getSession(), 'form field', 'id|name|label|value', $pulldown
            );
        }
        // $value = $radio_button->getAttribute('value');
        $pulldown->selectOption($arg2);
    }

    /**
     * @Given /^"([^"]*)" をクリックする$/
     */
    public function clickLinkForId($arg1)
    {
        $el = $this->getSession()->getPage()->find('css', 'a#'.$arg1);
        if (null === $el) {
            throw new ElementNotFoundException(
              $this->getSession(), 'form field', 'id|name|label|value', $el
            );
        }
        // $value = $radio_button->getAttribute('value');
        $el->click();
    }


//
// Place your definition and hook methods here:
//
//    /**
//     * @Given /^I have done something with "([^"]*)"$/
//     */
//    public function iHaveDoneSomethingWith($argument)
//    {
//        doSomethingWith($argument);
//    }
//
}