WordPress unit test to verify that slashed data is saved properly for post meta

wp-test-postmeta-slash.php

<?php

/**
 * @group meta
 * @group slashes
 * @ticket 21767
 */
class Tests_Meta_Slashes extends WP_UnitTestCase {
	function setUp() {
		parent::setUp();
		$this->author_id = $this->factory->user->create( array( 'role' => 'editor' ) );
		$this->old_current_user = get_current_user_id();
		wp_set_current_user( $this->author_id );

		$this->slash_1 = 'String with 1 slash \\';
		$this->slash_2 = 'String with 2 slashes \\\\';
		$this->slash_3 = 'String with 3 slashes \\\\\\';
		$this->slash_4 = 'String with 4 slashes \\\\\\\\';
		$this->slash_5 = 'String with 5 slashes \\\\\\\\\\';
		$this->slash_6 = 'String with 6 slashes \\\\\\\\\\\\';
		$this->slash_7 = 'String with 7 slashes \\\\\\\\\\\\\\';
	}

	function tearDown() {
		wp_set_current_user( $this->old_current_user );
		parent::tearDown();
	}

	/**
	 * Tests the controller function that expects slashed data
	 *
	 */
	function test_edit_post() {
		$id = $this->factory->post->create();
		if ( function_exists( 'wp_add_post_meta' ) ) {
			$meta_1 = wp_add_post_meta( $id, 'slash_test_1', 'foo' );
			$meta_2 = wp_add_post_meta( $id, 'slash_test_2', 'foo' );
			$meta_3 = wp_add_post_meta( $id, 'slash_test_3', 'foo' );
		}
		else {
			// expects slashed data
			$meta_1 = add_post_meta( $id, 'slash_test_1', addslashes( 'foo' ) );
			$meta_2 = add_post_meta( $id, 'slash_test_2', addslashes( 'foo' ) );
			$meta_3 = add_post_meta( $id, 'slash_test_3', addslashes( 'foo' ) );
		}

		$_POST = array();
		$_POST['post_ID'] = $id;
		$_POST['metakeyselect'] = '#NONE#';
		$_POST['metakeyinput'] = 'slash_test_0';
		$_POST['metavalue'] = $this->slash_6;
		$_POST['meta'] = array(
			$meta_1 => array(
				'key' => 'slash_test_1',
				'value' => $this->slash_1
			),
			$meta_2 => array(
				'key' => 'slash_test_2',
				'value' => $this->slash_3
			),
			$meta_3 => array(
				'key' => 'slash_test_3',
				'value' => $this->slash_4
			),
		);
		$_POST = add_magic_quotes( $_POST ); // the edit_post() function will strip slashes

		edit_post();
		$post = get_post( $id );

		$this->assertEquals( $this->slash_6, get_post_meta( $id, 'slash_test_0', true ) );
		$this->assertEquals( $this->slash_1, get_post_meta( $id, 'slash_test_1', true ) );
		$this->assertEquals( $this->slash_3, get_post_meta( $id, 'slash_test_2', true ) );
		$this->assertEquals( $this->slash_4, get_post_meta( $id, 'slash_test_3', true ) );

		$_POST = array();
		$_POST['post_ID'] = $id;
		$_POST['metakeyselect'] = '#NONE#';
		$_POST['metakeyinput'] = 'slash_test_0';
		$_POST['metavalue'] = $this->slash_7;
		$_POST['meta'] = array(
			$meta_1 => array(
				'key' => 'slash_test_1',
				'value' => $this->slash_2
			),
			$meta_2 => array(
				'key' => 'slash_test_2',
				'value' => $this->slash_4
			),
			$meta_3 => array(
				'key' => 'slash_test_3',
				'value' => $this->slash_5
			),
		);
		$_POST = add_magic_quotes( $_POST ); // the edit_post() function will strip slashes

		edit_post();
		$post = get_post( $id );

		$this->assertEquals( $this->slash_2, get_post_meta( $id, 'slash_test_1', true ) );
		$this->assertEquals( $this->slash_4, get_post_meta( $id, 'slash_test_2', true ) );
		$this->assertEquals( $this->slash_5, get_post_meta( $id, 'slash_test_3', true ) );
	}

	/**
	 * Tests the legacy model function that expects slashed data
	 *
	 */
	function test_add_post_meta() {
		$id = $this->factory->post->create();
		add_post_meta( $id, 'slash_test_1', addslashes( $this->slash_1 ) );
		add_post_meta( $id, 'slash_test_2', addslashes( $this->slash_3 ) );
		add_post_meta( $id, 'slash_test_3', addslashes( $this->slash_4 ) );

		$this->assertEquals( $this->slash_1, get_post_meta( $id, 'slash_test_1', true ) );
		$this->assertEquals( $this->slash_3, get_post_meta( $id, 'slash_test_2', true ) );
		$this->assertEquals( $this->slash_4, get_post_meta( $id, 'slash_test_3', true ) );
	}

	/**
	 * Tests the legacy model function that expects slashed data
	 *
	 */
	function test_update_post_meta() {
		$id = $this->factory->post->create();
		update_post_meta( $id, 'slash_test_1', addslashes( $this->slash_1 ) );
		update_post_meta( $id, 'slash_test_2', addslashes( $this->slash_3 ) );
		update_post_meta( $id, 'slash_test_3', addslashes( $this->slash_4 ) );

		$this->assertEquals( $this->slash_1, get_post_meta( $id, 'slash_test_1', true ) );
		$this->assertEquals( $this->slash_3, get_post_meta( $id, 'slash_test_2', true ) );
		$this->assertEquals( $this->slash_4, get_post_meta( $id, 'slash_test_3', true ) );
	}

	/**
	 * Tests the model function that expects un-slashed data
	 *
	 */
	function test_wp_add_post_meta() {
		if ( !function_exists( 'wp_add_post_meta' ) ) {
			return;
		}
		$id = $this->factory->post->create();
		wp_add_post_meta( $id, 'slash_test_1', $this->slash_1 );
		wp_add_post_meta( $id, 'slash_test_2', $this->slash_3 );
		wp_add_post_meta( $id, 'slash_test_3', $this->slash_4 );

		$this->assertEquals( $this->slash_1, get_post_meta( $id, 'slash_test_1', true ) );
		$this->assertEquals( $this->slash_3, get_post_meta( $id, 'slash_test_2', true ) );
		$this->assertEquals( $this->slash_4, get_post_meta( $id, 'slash_test_3', true ) );
	}

	/**
	 * Tests the model function that expects un-slashed data
	 *
	 */
	function test_wp_update_post_meta() {
		if ( !function_exists( 'wp_update_post_meta' ) ) {
			return;
		}
		$id = $this->factory->post->create();
		wp_update_post_meta( $id, 'slash_test_1', $this->slash_1 );
		wp_update_post_meta( $id, 'slash_test_2', $this->slash_3 );
		wp_update_post_meta( $id, 'slash_test_3', $this->slash_4 );

		$this->assertEquals( $this->slash_1, get_post_meta( $id, 'slash_test_1', true ) );
		$this->assertEquals( $this->slash_3, get_post_meta( $id, 'slash_test_2', true ) );
		$this->assertEquals( $this->slash_4, get_post_meta( $id, 'slash_test_3', true ) );
	}

	/**
	 * Tests the model function that expects un-slashed data
	 *
	 */
	function test_add_comment_meta() {
		$id = $this->factory->comment->create();

		add_comment_meta( $id, 'slash_test_1', $this->slash_1 );
		add_comment_meta( $id, 'slash_test_2', $this->slash_3 );
		add_comment_meta( $id, 'slash_test_3', $this->slash_5 );

		$this->assertEquals( $this->slash_1, get_comment_meta( $id, 'slash_test_1', true ) );
		$this->assertEquals( $this->slash_3, get_comment_meta( $id, 'slash_test_2', true ) );
		$this->assertEquals( $this->slash_5, get_comment_meta( $id, 'slash_test_3', true ) );

		add_comment_meta( $id, 'slash_test_4', $this->slash_2 );
		add_comment_meta( $id, 'slash_test_5', $this->slash_4 );
		add_comment_meta( $id, 'slash_test_6', $this->slash_6 );

		$this->assertEquals( $this->slash_2, get_comment_meta( $id, 'slash_test_4', true ) );
		$this->assertEquals( $this->slash_4, get_comment_meta( $id, 'slash_test_5', true ) );
		$this->assertEquals( $this->slash_6, get_comment_meta( $id, 'slash_test_6', true ) );
	}

	/**
	 * Tests the model function that expects un-slashed data
	 *
	 */
	function test_update_comment_meta() {
		$id = $this->factory->comment->create();

		add_comment_meta( $id, 'slash_test_1', 'foo' );
		add_comment_meta( $id, 'slash_test_2', 'foo' );
		add_comment_meta( $id, 'slash_test_3', 'foo' );

		update_comment_meta( $id, 'slash_test_1', $this->slash_1 );
		update_comment_meta( $id, 'slash_test_2', $this->slash_3 );
		update_comment_meta( $id, 'slash_test_3', $this->slash_5 );

		$this->assertEquals( $this->slash_1, get_comment_meta( $id, 'slash_test_1', true ) );
		$this->assertEquals( $this->slash_3, get_comment_meta( $id, 'slash_test_2', true ) );
		$this->assertEquals( $this->slash_5, get_comment_meta( $id, 'slash_test_3', true ) );

		update_comment_meta( $id, 'slash_test_1', $this->slash_2 );
		update_comment_meta( $id, 'slash_test_2', $this->slash_4 );
		update_comment_meta( $id, 'slash_test_3', $this->slash_6 );

		$this->assertEquals( $this->slash_2, get_comment_meta( $id, 'slash_test_1', true ) );
		$this->assertEquals( $this->slash_4, get_comment_meta( $id, 'slash_test_2', true ) );
		$this->assertEquals( $this->slash_6, get_comment_meta( $id, 'slash_test_3', true ) );
	}

}

Why not make slash_1, slash_2, etc. class constants?

Also, I think it would be less confusing if meta keys matched slash values:

wp_add_post_meta( $id, 'slash_test_1', $this->slash_1 );
wp_add_post_meta( $id, 'slash_test_2', $this->slash_2 );
wp_add_post_meta( $id, 'slash_test_3', $this->slash_3 );

I heard that you don't get comment notifications for gists anymore, unless I mention you, @alexkingorg.

Man, still didn't get any notifications - just happened to poke back in here. The tests run even and odd slashes in groups specifically.