Add test for all concordance lists implementing the concordance list

interface

tests/InterfaceImplementationTest.php

@@ -0,0 +1,64 @@
+<?PHP
+/**
+ * Test to ensure that all concordance lists in this repository implement the MDImporterConcordanceListInterface interface.
+ *
+ * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+ */
+declare(strict_types = 1);
+
+use PHPUnit\Framework\TestCase;
+
+// Require autoloader as per MDImporter's provideEnv.php
+require_once __DIR__ . '/../../../provideEnv.php';
+
+/**
+ * Test to ensure that all concordance lists in this repository implement the MDImporterConcordanceListInterface interface.
+ */
+final class InterfaceImplementationTest extends TestCase {
+
+    /** @var string[] */
+    private array $_lists = [];
+
+    /**
+     * Quasi-constructor connects to DB.
+     *
+     * @return void
+     */
+    protected function setUp():void {
+
+        if (($listFiles = scandir(__DIR__ . '/../src')) === false) {
+            throw new Exception("Failed to read /src directory");
+        }
+
+        foreach ($listFiles as $file) {
+            if (pathinfo($file, PATHINFO_EXTENSION) === 'php') {
+                $this->_lists[] = pathinfo($file, PATHINFO_FILENAME);
+            }
+        }
+
+    }
+
+    /**
+     * Test all concordance lists for their implementation of MDImporterConcordanceListInterface.
+     *
+     * @author Joshua Ramon Enslin <joshua@museum-digital.de>
+     * @group  ValidOutput
+     * @group  HTMLOutput
+     * @group  SafeForProduction
+     *
+     * @return void
+     */
+    public function testListInterfaceIsImplemented():void {
+
+        foreach ($this->_lists as $list) {
+            if (!file_exists(__DIR__ . '/../src/' . $list . '.php')) {
+                throw new Exception("List file does not exist" . $list);
+            }
+            require_once __DIR__ . '/../src/' . $list . '.php';
+
+            $interfaces = class_implements(new $list);
+            self::assertArrayHasKey('MDImporterConcordanceListInterface', $interfaces);
+        }
+
+    }
+}