Prepare for tests

.gitlab-ci.yml

 include:
-  - remote: https://git-cdn.e15r.co/gitlab/ci/wordpress/-/raw/main/plugins/default.yml
+  - remote: https://git-cdn.e15r.co/gitlab/ci/wordpress/-/raw/main/plugins/templates/variables.yml
+  - remote: https://git-cdn.e15r.co/gitlab/ci/wordpress/-/raw/main/plugins/templates/cache.yml
+  - remote: https://git.ethitter.com/gitlab/ci/wordpress/-/raw/add/redis/plugins/templates/before-script-redis.yml
+  - remote: https://git.ethitter.com/gitlab/ci/wordpress/-/raw/add/redis/plugins/templates/matrix-redis.yml

tests/inc/test-plugin.php

+<?php
+/**
+ * Test plugin features.
+ *
+ * @package Redis_User_Session_Storage
+ */
+
+namespace Redis_User_Session_Storage\Tests\Inc;
+
+use Redis_User_Session_Storage\Plugin;
+use WP_Session_Tokens;
+use WP_UnitTestCase;
+
+/**
+ * @coversDefaultClass \Redis_User_Session_Storage\Plugin
+ */
+class TestPlugin extends WP_UnitTestCase {
+	protected $plugin;
+
+	public function set_up() {
+		// TODO: use reflection to make this more useful. Create a helper, stop initializing here.
+		$this->plugin = new Plugin( 0 );
+	}
+
+	public function test__construct() {
+		$this->assertInstanceOf( Plugin::class, $this->plugin );
+		$this->assertInstanceOf( WP_Session_Tokens::class, $this->plugin );
+
+		$this->assertEquals( 'wpruss', $this->plugin->prefix );
+	}
+}

tests/test-sample.php

-<?php
-/**
- * Class SampleTest
- *
- * @package Redis_User_Session_Storage
- */
-
-/**
- * Sample test case.
- */
-class SampleTest extends WP_UnitTestCase {
-
-	/**
-	 * A single example test.
-	 */
-	public function test_sample() {
-		// Replace this with some actual testing code.
-		$this->assertTrue( true );
-	}
-}