silverstripe-subsites/tests/BaseSubsiteTest.php

<?php
class BaseSubsiteTest extends SapphireTest {

	function setUp() {
		parent::setUp();

		Subsite::$use_session_subsiteid = true;
	}

	/**
	 * Avoid subsites filtering on fixture fetching.
	 */
	function objFromFixture($class, $id) {
		Subsite::disable_subsite_filter(true);
		$obj = parent::objFromFixture($class, $id);
		Subsite::disable_subsite_filter(false);		

		return $obj;
	}

	/**
	 * Tests the initial state of disable_subsite_filter
	 */
	function testDisableSubsiteFilter() {
		$this->assertFalse(Subsite::$disable_subsite_filter);
	}

}