feat: add faker support

Author: wilcorrea

tests/_/FunctionsTest.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Constructo\Test\_;
+
+use PHPUnit\Framework\TestCase;
+
+class FunctionsTest extends TestCase
+{
+    public function testShouldRequireFunctions(): void
+    {
+        $files = [
+            'src/_/cast.php',
+            'src/_/crypt.php',
+            'src/_/json.php',
+            'src/_/notation.php',
+            'src/_/util.php',
+        ];
+        foreach ($files as $file) {
+            $filename = __DIR__ . '/../../' . $file;
+            $this->assertFileExists($filename, sprintf("File '%s' does not exist", $file));
+            require $filename;
+        }
+    }
+}