Set up unit tests.

tests/Asset_ManagerTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Rarst\Laps\Tests;
+
+use Brain\Monkey\Functions;
+use Rarst\Laps\Manager\Asset_Manager;
+
+class Asset_ManagerTest extends LapsTestCase {
+
+	public function test__construct() {
+
+		$manager = new Asset_Manager();
+
+		$this->assertTrue( has_action( 'wp_enqueue_scripts', [ $manager, 'enqueue_scripts' ] ) );
+		$this->assertTrue( has_action( 'admin_enqueue_scripts', [ $manager, 'enqueue_scripts' ] ) );
+
+		return $manager;
+	}
+
+
+	/**
+	 * @depends test__construct
+	 */
+	public function testEnqueue_scripts( Asset_Manager $manager ) {
+
+		Functions\expect( 'wp_register_script' )->once();
+		Functions\expect( 'wp_register_style' )->once();
+		Functions\expect( 'plugins_url' )->zeroOrMoreTimes();
+		Functions\expect( 'is_admin_bar_showing' )->once()->andReturn( true );
+		Functions\expect( 'wp_enqueue_script' )->once();
+		Functions\expect( 'wp_enqueue_style' )->once();
+
+		$manager->enqueue_scripts();
+	}
+}