diff --git a/tests/FinanceOrderTest.php b/tests/FinanceOrderTest.php
new file mode 100644
index 0000000..98296a4
--- /dev/null
+++ b/tests/FinanceOrderTest.php
@@ -0,0 +1,100 @@
+<?php declare(strict_types=1);
+
+use PHPUnit\Framework\TestCase;
+use PKPass\FinanceOrder;
+
+final class FinanceOrderTest extends TestCase
+{
+    private function validateOrder($orer, $expected_files = [])
+    {
+        // basic string validation
+        $this->assertIsString($orer);
+        $this->assertGreaterThan(100, strlen($orer));
+        $this->assertStringContainsString('logo.png', $orer);
+        $this->assertStringContainsString('ws03-xs-red.jpg', $orer);
+        $this->assertStringContainsString('manifest.json', $orer);
+
+        // try to read the ZIP file
+        $temp_name = tempnam(sys_get_temp_dir(), 'pkpass');
+        file_put_contents($temp_name, $orer);
+        $zip = new ZipArchive();
+        $res = $zip->open($temp_name);
+        $this->assertTrue($res, 'Invalid ZIP file.');
+        $this->assertEquals(count($expected_files), $zip->numFiles);
+
+        // extract zip to temp dir
+        $temp_dir = $temp_name . '_dir';
+        mkdir($temp_dir);
+        $zip->extractTo($temp_dir);
+        $zip->close();
+        echo $temp_dir;
+        foreach ($expected_files as $file) {
+            $this->assertFileExists($temp_dir . DIRECTORY_SEPARATOR . $file);
+        }
+    }
+
+    public function testBasicGeneration()
+    {
+        $pass = new FinanceOrder(__DIR__ . '/fixtures/example-certificate.p12', 'password');
+        $pass->setData([
+            "createdAt" => "2024-02-01T19:45:50+00:00",
+            "merchant" => [
+                "displayName" => "Luma",
+                "merchantIdentifier" => "merchant.com.pkpass.unit-test",
+                "url" => "https://demo-store.test/",
+                'logo' => 'logo.png',
+            ],
+            "orderIdentifier" => "1",
+            "orderManagementURL" => "https://demo-store.test/sales/order/view",
+            'orderNumber' => '#000000001',
+            "orderType" => "ecommerce",
+            "orderTypeIdentifier" => "order.com.pkpass.unit-test",
+            'payment' => [
+                'summaryItems' => [
+                    [
+                        'label' => 'Shipping & Handling',
+                        'value' => [
+                            'amount' => '5.00',
+                            'currency' => 'USD',
+                        ]
+                    ],
+                ],
+                'total' => [
+                    'amount' => '36.39',
+                    'currency' => 'USB',
+                ],
+                'status' => 'paid'
+            ],
+            "status" => "open",
+            "updatedAt" => "2024-02-01T19:45:50+00:00",
+            'customer' => [
+                'emailAddress' => 'roni_cost@example.com',
+                'familyName' => 'Veronica',
+                'givenName' => 'Costello',
+            ],
+            'lineItems' => [
+                [
+                    'image' => 'ws03-xs-red.jpg',
+                    'price' => [
+                        'amount' => '31.39',
+                        'currency' => 'USD',
+                    ],
+                    'quantity' => 1,
+                    'title' => 'Iris Workout Top',
+                    'sku' => 'WS03-XS-Red',
+                ],
+            ],
+            "schemaVersion" => 1,
+        ]);
+        $pass->addFile(__DIR__ . '/fixtures/order/logo.png');
+        $pass->addFile(__DIR__ . '/fixtures/order/ws03-xs-red.jpg');
+        $value = $pass->create();
+        $this->validateOrder($value, [
+            'logo.png',
+            'ws03-xs-red.jpg',
+            'manifest.json',
+            'order.json',
+            'signature',
+        ]);
+    }
+}
\ No newline at end of file
diff --git a/tests/fixtures/order/logo.png b/tests/fixtures/order/logo.png
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diff --git a/tests/fixtures/order/ws03-xs-red.jpg b/tests/fixtures/order/ws03-xs-red.jpg
new file mode 100644
index 0000000..972fbe5
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