WIP: Add DB seed and tests for coverart in API

Following up on PR#245, add a DataBase Seeder that uses our scrubbed
database dump
(https://github.com/LibriVox/librivox-ansible/blob/master/roles/db_import/files/librivox_catalog_scrubbed.sql.bz2), and start using it to test coverart in the API.

application/database/seeds/DatabaseSeeder.php

@@ -0,0 +1,14 @@
+<?php
+
+class DatabaseSeeder extends Seeder {
+
+	public function run()
+	{
+        $dump = fopen('compress.bzip2://'. __DIR__ . '/librivox_catalog_scrubbed.sql.bz2');
+        while ($line = fgets($dump) !== False)
+        {
+            $this->db->query($line);
+        }
+        fclose($dump);
+	}
+}

application/libraries/Seeder.php

@@ -0,0 +1,133 @@
+<?php
+/**
+ * Part of ci-phpunit-test
+ *
+ * @author     Kenji Suzuki <https://github.com/kenjis>
+ * @license    MIT License
+ * @copyright  2015 Kenji Suzuki
+ * @link       https://github.com/kenjis/ci-phpunit-test
+ */
+
+class Seeder
+{
+	/**
+	 * @var CI_Controller
+	 */
+	private $CI;
+
+	/**
+	 * @var CI_DB_query_builder
+	 */
+	protected $db;
+
+	/**
+	 * @var CI_DB_forge
+	 */
+	protected $dbforge;
+
+	/**
+	 * @var string
+	 */
+	protected $seedPath;
+
+	/**
+	 * @var array
+	 */
+	protected $depends = [];
+
+	public function __construct()
+	{
+		$this->CI =& get_instance();
+		$this->CI->load->database();
+		$this->CI->load->dbforge();
+		$this->db = $this->CI->db;
+		$this->dbforge = $this->CI->dbforge;
+	}
+
+	/**
+	 * Run another seeder
+	 *
+	 * @param string $seeder Seeder classname
+	 * @param bool $callDependencies
+	 */
+	public function call($seeder, $callDependencies = true)
+	{
+		if ($this->seedPath === null)
+		{
+			$this->seedPath = APPPATH . 'database/seeds/';
+		}
+
+		$obj = $this->loadSeeder($seeder);
+		if ($callDependencies === true && $obj instanceof Seeder) {
+			$obj->callDependencies($this->seedPath);
+		}
+		$obj->run();
+	}
+
+	/**
+	 * Get Seeder instance
+	 *
+	 * @param string $seeder
+	 * @return Seeder
+	 */
+	protected function loadSeeder($seeder)
+	{
+		$file = $this->seedPath . $seeder . '.php';
+		require_once $file;
+
+		return new $seeder;
+	}
+
+	/**
+	 * Call dependency seeders
+	 *
+	 * @param string $seedPath
+	 */
+	public function callDependencies($seedPath)
+	{
+		foreach ($this->depends as $path => $seeders) {
+			$this->seedPath = $seedPath;
+			if (is_string($path)) {
+				$this->setPath($path);
+			}
+
+			$this->callDependency($seeders);
+		}
+		$this->setPath($seedPath);
+	}
+
+	/**
+	 * Call dependency seeder
+	 *
+	 * @param string|array $seederName
+	 */
+	protected function callDependency($seederName)
+	{
+		if (is_array($seederName)) {
+			array_map([$this, 'callDependency'], $seederName);
+			return;
+		}
+
+		$seeder = $this->loadSeeder($seederName);
+		if (is_string($this->seedPath)) {
+			$seeder->setPath($this->seedPath);
+		}
+
+		$seeder->call($seederName, true);
+	}
+
+	/**
+	 * Set path for seeder files
+	 *
+	 * @param string $path
+	 */
+	public function setPath($path)
+	{
+		$this->seedPath = rtrim($path, '/').'/';
+	}
+
+	public function __get($property)
+	{
+		return $this->CI->$property;
+	}
+}

application/tests/DbTestCase.php

@@ -2,4 +2,12 @@
 
 class DbTestCase extends CIPHPUnitTestDbTestCase
 {
+    public static function setUpBeforeClass(): void
+    {
+        parent::setUpBeforeClass();
+
+        $CI =& get_instance();
+		$CI->load->library('Seeder');
+		$CI->seeder->call('DatabaseSeeder');
+    }
 }

application/tests/controllers/API_test.php

@@ -0,0 +1,31 @@
+<?php
+
+class API_test extends DbTestCase
+{
+
+	public function test_coverart() {
+		$output = $this->request(
+			'GET',
+			'/api/feed/audiobooks/id/52',
+			[
+				'coverart' => 1,
+				'format' => 'json',
+			]
+		);
+        $books = json_decode($output);
+        $this->assertEquals(
+            $books[0]['coverart_jpg'],
+            'https://www.archive.org/download/LibrivoxCdCoverArt12/Letters_Two_Brides_1110.jpg'
+        );
+        $this->assertEquals(
+            $books[0]['coverart_pdf'],
+            'https://www.archive.org/download/LibrivoxCdCoverArt12/Letters_Two_Brides_1110.pdf'
+        );
+        $this->assertEquals(
+            $books[0]['coverart_thumbnail'],
+            'https://www.archive.org/download/LibrivoxCdCoverArt12/Letters_Two_Brides_1110_thumb.jpg'
+        );
+	}
+}
+
+?>