Add integration tests

tests/Integration/CashDrawersTest.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace Square\Tests\Integration;
+
+use DateTime;
+use DateTimeInterface;
+use PHPUnit\Framework\TestCase;
+use Square\CashDrawers\Shifts\Requests\ListShiftsRequest;
+use Square\Exceptions\SquareApiException;
+use Square\Exceptions\SquareException;
+use Square\SquareClient;
+
+class CashDrawersTest extends TestCase
+{
+    private static SquareClient $client;
+
+    public static function setUpBeforeClass(): void
+    {
+        self::$client = Helpers::createClient();
+    }
+
+    /**
+     * @throws SquareException
+     * @throws SquareApiException
+     */
+    public function testListCashDrawerShifts(): void
+    {
+        $start = (new DateTime('-1 hour'))->format(DateTimeInterface::ATOM);
+        $end = (new DateTime())->format(DateTimeInterface::ATOM);
+        $locationId = Helpers::getDefaultLocationId(self::$client);
+
+        $request = new ListShiftsRequest([
+            'locationId' => $locationId,
+            'beginTime' => $start,
+            'endTime' => $end,
+        ]);
+
+        $response = self::$client->cashDrawers->shifts->list($request);
+
+        $this->assertNotNull($response);
+        iterator_to_array($response);
+    }
+}