Migrate tests to Pest

tests/Unit/Mapper/StringMapperTest.php

@@ -0,0 +1,23 @@
+<?php
+/**
+ * @author Daniel J. Summers <daniel@bitbadger.solutions>
+ * @license MIT
+ */
+
+declare(strict_types=1);
+
+use BitBadger\PDODocument\Mapper\StringMapper;
+
+pest()->group('unit');
+
+describe('->map()', function () {
+    test('returns existing string column value', function () {
+        expect(new StringMapper('test_field'))->map(['test_field' => 'test_value'])->toBe('test_value');
+    });
+    test('returns string value of non-string column', function () {
+        expect(new StringMapper('a_number'))->map(['a_number' => 6.7])->toBe('6.7');
+    });
+    test('returns null for a missing column', function () {
+        expect(new StringMapper('something_else'))->map([])->toBeNull();
+    });
+});