Bugfix missing package in requirements for QR scan

requirements.txt

@@ -2,4 +2,5 @@ Wand==0.6.5
 Pillow==8.1.0
 PyPDF2==1.26.0
 pwgen==0.8.2.post0
-pikepdf==2.5.0
\ No newline at end of file
+pikepdf==2.5.0
+pyzbar==0.1.8

tests/test_qr.py

+import unittest
+import time
+
+
+class MainTest(unittest.TestCase):
+    def setUp(self):
+        self.tic = time.time()  # todo this is sooo ugly
+
+    def tearDown(self):
+        self.toc = time.time()
+        t = self.toc - self.tic
+        print('Time: %.3f' % (t))
+
+    def test_extract_first_qr(self):
+        from utils import qr as qr_utils
+
+        expected_qr = "23-16"
+
+        pdf_file = "./pdfs/456789_Lastname.pdf"
+        qr = qr_utils.first_qr_from_first_pdf_page(pdf_file=pdf_file)
+        self.assertEqual(qr, expected_qr)
+
+    def test_extract_all_qrs(self):
+        from utils import qr as qr_utils
+
+        expected_qrs = [
+            ['23-01'],
+            ['23-02'],
+            ['23-03'],
+            ['23-04'],
+            ['23-05'],
+            ['23-06'],
+            ['23-07'],
+            ['23-08'],
+            ['23-09'],
+            ['23-10'],
+            ['23-11'],
+            ['23-12'],
+            ['23-13'],
+            ['23-14'],
+            ['23-15'],
+            ['23-16']
+        ]
+
+        # Parameters
+        dpi = 200
+        pdf_file = "./pdfs/456789_Lastname.pdf"
+
+        # Decode all QRs
+        qrs, _ = qr_utils.qrs_from_pdf(pdf_file=pdf_file, dpi=dpi)
+        qrs.sort()
+        self.assertEqual(qrs, expected_qrs)