silverstripe-blog/tests/BlogPostFilterTest.php

<?php

/**
 * @mixin PHPUnit_Framework_TestCase
 */
class BlogPostFilterTest extends SapphireTest {
	/**
	 * @var string
	 */
	static $fixture_file = 'blog.yml';

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

		SS_Datetime::set_mock_now('2013-10-10 20:00:00');
	}

	public function tearDown() {
		SS_Datetime::clear_mock_now();

		parent::tearDown();
	}

	public function testFilter() {
		$member = Member::currentUser();

		if($member) {
			$member->logout();
		}

		/**
		 * @var Blog $blog
		 */
		$blog = $this->objFromFixture('Blog', 'FirstBlog');

		$this->assertEquals(3, $blog->AllChildren()->Count(), 'Filtered blog posts');

		SS_Datetime::set_mock_now('2020-01-01 00:00:00');

		$this->assertEquals(5, $blog->AllChildren()->Count(), 'Unfiltered blog posts');
	}
}