WordPressの固定ページ単体テストのサンプルです。

wp-unit-test-page-sample.php

/**
 * WP_UnitTestCaseのサンプル
 *
 * @package   InfoTown
 * @author    Hiroshi Sawai <info@info-town.jp>
 * @copyright Hiroshi Sawai
 */
class Page_Test extends WP_UnitTestCase {

	/**
	 * @group page
	 *
	 * @link  http://qiita.com/miya0001/items/8f1a777b455a8bdcbd62
	 */
	public function test_page() {
		$post = $this->factory->post->create_and_get( [
			'post_title' => 'Sample Page!',
			'post_type'  => 'page',
		] );

		$this->go_to( '/?page_id=' . $post->ID );
		$this->assertTrue( is_page() );
		$this->expectOutputString( "Sample Page!" );
		the_title();
	}

	/**
	 * @group page
	 *
	 * @link  http://qiita.com/miya0001/items/8f1a777b455a8bdcbd62
	 */
	public function test_page_many() {
		$post = $this->factory->post->create_and_get( [
			'post_title' => 'Sample Page',
			'post_type'  => 'page',
		] );
		$this->factory->post->create_many( 5 );

		$this->go_to( '/?page_id=' . $post->ID );
		$this->assertTrue( is_page() );
		$this->expectOutputString( "Sample Page" );
		the_title();
	}

	/**
	 * 孫ページ
	 *
	 * @group page
	 *
	 * @link  http://qiita.com/miya0001/items/8f1a777b455a8bdcbd62
	 */
	public function test_grandson_page() {
		$post_parent    = $this->factory->post->create_and_get( [
			'slug'       => 'parent',
			'post_title' => 'Parent Page',
			'post_type'  => 'page',
		] );
		$post_child1    = $this->factory->post->create_and_get( [
			'slug'        => 'child1',
			'post_title'  => 'Child1 Page',
			'post_type'   => 'page',
			'post_parent' => $post_parent->ID,
		] );
		$post_grandson1 = $this->factory->post->create_and_get( [
			'slug'        => 'grandson1',
			'post_title'  => 'Grandson1 Page',
			'post_type'   => 'page',
			'post_parent' => $post_child1->ID,
		] );
		$this->go_to( '/?page_id=' . $post_grandson1->ID );
		$this->assertTrue( is_page() );
		$this->expectOutputString( "Grandson1 Page" );
		the_title();
	}

	/**
	 * wp_list_page
	 *
	 * @group page
	 */
	public function test_wp_list_page() {
		$post_parent = $this->factory->post->create_and_get( [
			'slug'       => 'parent',
			'post_title' => 'Parent Page',
			'post_type'  => 'page',
		] );
		$post_child1 = $this->factory->post->create_and_get( [
			'slug'        => 'child1',
			'post_title'  => 'Child1 Page',
			'post_type'   => 'page',
			'post_parent' => $post_parent->ID,
		] );
		$this->factory->post->create_and_get( [
			'slug'        => 'grandson1',
			'post_title'  => 'Grandson1 Page',
			'post_type'   => 'page',
			'post_parent' => $post_child1->ID,
		] );
		$this->expectOutputRegex( '/(?=.*Parent Page)(?=.*Child1 Page)(?=.*Grandson1 Page)/s' );
		wp_list_pages();
	}

	/**
	 * wp_list_page引数あり
	 *
	 * @group page
	 *
	 * @link  https://developer.wordpress.org/reference/classes/walker_page/start_el/
	 */
	public function test_wp_list_page_custom() {
		$post_parent    = $this->factory->post->create_and_get( [
			'slug'       => 'parent',
			'post_title' => 'Parent Page',
			'post_type'  => 'page',
		] );
		$post_child1    = $this->factory->post->create_and_get( [
			'slug'        => 'child1',
			'post_title'  => 'Child1 Page',
			'post_type'   => 'page',
			'post_parent' => $post_parent->ID,
		] );
		$post_grandson1 = $this->factory->post->create_and_get( [
			'slug'        => 'grandson1',
			'post_title'  => 'Grandson1 Page',
			'post_type'   => 'page',
			'post_parent' => $post_child1->ID,
		] );
		// Parent Page, Child1 Page, Grandson1 Pageの順でマッチします。
		$this->expectOutputRegex( '/(?=.*\[Parent Page\])(?=.*\[Child1 Page\])(?=.*\[Grandson1 Page\])/s' );
		wp_list_pages( [
			'title_li'    => 'Test',
			'link_after'  => '] ',
			'link_before' => '[',
		] );
	}
}