--- /dev/null
+<?php
+
+/*
+ * This file is part of the Behat Testwork.
+ * (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\Testwork\Environment\Handler;
+
+use Behat\Testwork\Environment\Environment;
+use Behat\Testwork\Environment\EnvironmentManager;
+use Behat\Testwork\Suite\Suite;
+
+/**
+ * Handles test environment building and isolation.
+ *
+ * @see EnvironmentManager
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+interface EnvironmentHandler
+{
+ /**
+ * Checks if handler supports provided suite.
+ *
+ * @param Suite $suite
+ *
+ * @return Boolean
+ */
+ public function supportsSuite(Suite $suite);
+
+ /**
+ * Builds environment object based on provided suite.
+ *
+ * @param Suite $suite
+ *
+ * @return Environment
+ */
+ public function buildEnvironment(Suite $suite);
+
+ /**
+ * Checks if handler supports provided environment.
+ *
+ * @param Environment $environment
+ * @param mixed $testSubject
+ *
+ * @return Boolean
+ */
+ public function supportsEnvironmentAndSubject(Environment $environment, $testSubject = null);
+
+ /**
+ * Isolates provided environment.
+ *
+ * @param Environment $environment
+ * @param mixed $testSubject
+ *
+ * @return Environment
+ */
+ public function isolateEnvironment(Environment $environment, $testSubject = null);
+}