Migrate tests to Pest (#8)

Reviewed-on: #8

tests/Unit/DocumentExceptionTest.php

@@ -0,0 +1,40 @@
+<?php
+/**
+ * @author Daniel J. Summers <daniel@bitbadger.solutions>
+ * @license MIT
+ */
+
+declare(strict_types=1);
+
+use BitBadger\PDODocument\DocumentException;
+
+pest()->group('unit');
+
+describe('Constructor', function () {
+    test('fills code and prior exception if provided', function () {
+        $priorEx = new Exception('Uh oh');
+        expect(new DocumentException('Test Exception', 17, $priorEx))
+            ->not->toBeNull()
+            ->getMessage()->toBe('Test Exception')
+            ->getCode()->toBe(17)
+            ->getPrevious()->toBe($priorEx);
+    });
+    test('uses expected code and prior exception if not provided', function () {
+        expect(new DocumentException('Oops'))
+            ->not->toBeNull()
+            ->getMessage()->toBe('Oops')
+            ->getCode()->toBe(0)
+            ->getPrevious()->toBeNull();
+    });
+});
+
+describe('->__toString()', function () {
+    test('excludes code if 0', function () {
+        $ex = new DocumentException('Test failure');
+        expect("$ex")->toBe("BitBadger\PDODocument\DocumentException: Test failure\n");
+    });
+    test('includes code if non-zero', function () {
+        $ex = new DocumentException('Oof', -6);
+        expect("$ex")->toBe("BitBadger\PDODocument\DocumentException: [-6] Oof\n");
+    });
+});