Tests the relevanssi_no_image_attachments function and feature.

test-indexing.php

<?php
/**
 * Tests the relevanssi_no_image_attachments function and feature.
 */
public function test_no_image_attachments() {
	$this->delete_all_posts();
	$image_attachment = array(
		'post_title'     => 'cat gif',
		'post_mime_type' => 'image/gif',
		'post_type'      => 'attachment',
		'post_status'    => 'publish',
	);
	wp_insert_post( $image_attachment );
	$pdf_attachment = array(
		'post_title'     => 'cat pdf',
		'post_mime_type' => 'application/pdf',
		'post_type'      => 'attachment',
		'post_status'    => 'publish',
	);
	wp_insert_post( $pdf_attachment );
	update_option( 'relevanssi_index_post_types', array( 'attachment' ) );
	update_option( 'relevanssi_index_image_files', 'off' );
	$return = relevanssi_build_index( false, null, null, true );
	$this->assertEquals(
		1,
		$return['indexed'],
		"With image files excluded, the number of posts indexed isn't correct."
	);
	update_option( 'relevanssi_index_image_files', 'on' );
	$return = relevanssi_build_index( false, null, null, true );
	$this->assertEquals(
		2,
		$return['indexed'],
		"With image files included, the number of posts indexed isn't correct."
	);
}