Ignore a few test cases that require OpenCV on PyPy3.9

tests/requirements.txt

@@ -4,7 +4,7 @@ pytest-cov
 pypng~=0.0.20
 pyzbar~=0.1.8
 qrcode-artistic
-opencv-python
+opencv-python; python_version > '3.9'
 Pillow
 importlib-metadata>=3.6.0; python_version < '3.10'
 

tests/test_encode_decode.py

@@ -11,17 +11,21 @@
 Requires pyzbar and additional libs (libzbar0).
 """
 import io
-import cv2 as cv
-import numpy as np
 import pytest
 import segno
+_cv_available = True
+try:
+    import cv2 as cv
+    import numpy as np
+except (ImportError):
+    _cv_available = False
 try:
     from pyzbar.pyzbar import decode as zbardecode
 except (ImportError, FileNotFoundError):  # The latter may occur under Windows
     pytestmark = pytest.mark.skip
 
 
-def decode_kanji(qrcode):
+def decode_zbar(qrcode):
     scale = 3
     width, height = qrcode.symbol_size(scale=scale)
     out = io.BytesIO()
@@ -47,7 +51,9 @@ def decode(qrcode):
     if qrcode.is_micro:
         raise Exception('Cannot decode Micro QR codes')
     # OpenCV does not support Kanji
-    return decode_cv(qrcode) if qrcode.mode != 'kanji' else decode_kanji(qrcode)
+    if _cv_available and qrcode.mode != 'kanji':
+        return decode_cv(qrcode)
+    return decode_zbar(qrcode)
 
 
 @pytest.mark.parametrize('content, mode',
@@ -68,7 +74,10 @@ def test_stackoverflow_issue():
     content = 'Thomsôn Gonçalves Ámaral,325.432.123-21'
     qr = segno.make(content, encoding='utf-8')
     assert 'byte' == qr.mode
-    assert content == decode(qr)
+    decoded = decode(qr)
+    if not _cv_available:
+        decoded = decoded.encode('shift-jis').decode('utf-8')
+    assert content == decoded
 
 
 def test_pyqrcode_issue76():
@@ -85,6 +94,7 @@ def test_pyqrcode_issue76():
     assert content == decode(qr)
 
 
+@pytest.mark.skipif(not _cv_available, reason="Requires OpenCV")
 @pytest.mark.parametrize('encoding', [None, 'latin1', 'ISO-8859-1', 'utf-8'])
 def test_issue134(encoding):
     # See <https://github.com/heuer/segno/issues/134>

tests/test_issue_105_epc_slash.py

@@ -13,19 +13,23 @@
 """
 import io
 import pytest
-import cv2 as cv
-import numpy as np
 from segno.helpers import make_epc_qr
+try:
+    from pyzbar.pyzbar import decode as zbardecode
+except (ImportError, FileNotFoundError):  # The latter may occur under Windows
+    pytestmark = pytest.mark.skip
 
 
 def decode(qrcode):
+    scale = 3
+    width, height = qrcode.symbol_size(scale=scale)
     out = io.BytesIO()
-    qrcode.save(out, scale=3, kind='png')
-    out.seek(0)
-    img = cv.imdecode(np.frombuffer(out.getvalue(), np.uint8), flags=cv.IMREAD_COLOR)
-    detector = cv.QRCodeDetector()
-    decoded, points, qrcode_bin = detector.detectAndDecode(img)
-    return decoded or None
+    for row in qrcode.matrix_iter(scale=scale):
+        out.write(bytearray(0x0 if b else 0xff for b in row))
+    decoded = zbardecode((out.getvalue(), width, height))
+    assert 1 == len(decoded)
+    assert 'QRCODE' == decoded[0].type
+    return decoded[0].data.decode('utf-8')
 
 
 @pytest.mark.parametrize('text', ['/',