add implementation

tests/Feature/ExampleTest.php

@@ -0,0 +1,8 @@
+<?php declare(strict_types=1);
+
+test(
+    'example',
+    function (): void {
+        expect(true)->toBeTrue();
+    },
+);

tests/Pest.php

@@ -0,0 +1,30 @@
+<?php declare(strict_types=1);
+
+use Tests\TestCase;
+
+/*
+|--------------------------------------------------------------------------
+| Test Case
+|--------------------------------------------------------------------------
+|
+| The closure you provide to your test functions is always bound to a specific PHPUnit test
+| case class. By default, that class is "PHPUnit\Framework\TestCase". Of course, you may
+| need to change it using the "uses()" function to bind a different classes or traits.
+|
+*/
+uses(TestCase::class)->in('Feature', 'Unit');
+
+/*
+|--------------------------------------------------------------------------
+| Functions
+|--------------------------------------------------------------------------
+|
+| While Pest is very powerful out-of-the-box, you may have some testing code specific to your
+| project that you don't want to repeat in every file. Here you can also expose helpers as
+| global functions to help you to reduce the number of lines of code in your test files.
+|
+*/
+function something(): void
+{
+    // ..
+}

tests/TestCase.php

@@ -0,0 +1,10 @@
+<?php declare(strict_types=1);
+
+namespace Tests;
+
+use PHPUnit\Framework\TestCase as BaseTestCase;
+
+abstract class TestCase extends BaseTestCase
+{
+    //
+}

tests/Unit/ExampleTest.php

@@ -0,0 +1,8 @@
+<?php declare(strict_types=1);
+
+test(
+    'example',
+    function (): void {
+        expect(true)->toBeTrue();
+    },
+);