--- /dev/null
+<?php
+
+/*
+ * This file is part of the Behat.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Behat\Behat\Tester;
+
+use Behat\Behat\Tester\Result\StepResult;
+use Behat\Gherkin\Node\FeatureNode;
+use Behat\Gherkin\Node\StepNode;
+use Behat\Testwork\Environment\Environment;
+use Behat\Testwork\Tester\Setup\Setup;
+use Behat\Testwork\Tester\Setup\Teardown;
+
+/**
+ * Prepares and tests provided step object against provided environment.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+interface StepTester
+{
+ /**
+ * Sets up step for a test.
+ *
+ * @param Environment $env
+ * @param FeatureNode $feature
+ * @param StepNode $step
+ * @param Boolean $skip
+ *
+ * @return Setup
+ */
+ public function setUp(Environment $env, FeatureNode $feature, StepNode $step, $skip);
+
+ /**
+ * Tests step.
+ *
+ * @param Environment $env
+ * @param FeatureNode $feature
+ * @param StepNode $step
+ * @param Boolean $skip
+ *
+ * @return StepResult
+ */
+ public function test(Environment $env, FeatureNode $feature, StepNode $step, $skip);
+
+ /**
+ * Tears down step after a test.
+ *
+ * @param Environment $env
+ * @param FeatureNode $feature
+ * @param StepNode $step
+ * @param Boolean $skip
+ * @param StepResult $result
+ *
+ * @return Teardown
+ */
+ public function tearDown(Environment $env, FeatureNode $feature, StepNode $step, $skip, StepResult $result);
+}