Set up unit tests.

tests/LapsTestCase.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace Rarst\Laps\Tests;
+
+use Mockery\Adapter\Phpunit\MockeryPHPUnitIntegration;
+use PHPUnit\Framework\TestCase;
+use Brain\Monkey;
+
+class LapsTestCase extends TestCase {
+
+	use MockeryPHPUnitIntegration;
+
+	protected function setUp() {
+		parent::setUp();
+		Monkey\setUp();
+	}
+
+	protected function tearDown() {
+		Monkey\tearDown();
+		parent::tearDown();
+	}
+}