Migrate tests to Pest (#8)

Reviewed-on: #8

tests/Unit/ModeTest.php

@@ -0,0 +1,23 @@
+<?php
+/**
+ * @author Daniel J. Summers <daniel@bitbadger.solutions>
+ * @license MIT
+ */
+
+declare(strict_types=1);
+
+use BitBadger\PDODocument\{DocumentException, Mode};
+
+pest()->group('unit');
+
+describe('::deriveFromDSN()', function () {
+    test('derives for PostgreSQL', function () {
+        expect(Mode::deriveFromDSN('pgsql:Host=localhost'))->toBe(Mode::PgSQL);
+    })->group('postgresql');
+    test('derives for SQLite', function () {
+        expect(Mode::deriveFromDSN('sqlite:data.db'))->toBe(Mode::SQLite);
+    })->group('sqlite');
+    test('throws for other drivers', function () {
+        expect(fn() => Mode::deriveFromDSN('mysql:Host=localhost'))->toThrow(DocumentException::class);
+    });
+});