Add media tests for a CMYK JPEG image (#17786)

changelog.d/17786.misc

@@ -0,0 +1 @@
+Add a test for downloading and thumbnailing a CMYK JPEG.

tests/media/test_media_storage.py

@@ -60,7 +60,7 @@
 
 from tests import unittest
 from tests.server import FakeChannel
-from tests.test_utils import SMALL_PNG
+from tests.test_utils import SMALL_CMYK_JPEG, SMALL_PNG
 from tests.unittest import override_config
 from tests.utils import default_config
 
@@ -187,6 +187,68 @@ class TestImage:
     # different versions of Pillow.
 )
 
+small_cmyk_jpeg = TestImage(
+    SMALL_CMYK_JPEG,
+    b"image/jpeg",
+    b".jpeg",
+    # These values were sourced simply by seeing at what the tests produced at
+    # the time of writing. If this changes, the tests will fail.
+    unhexlify(
+        b"ffd8ffe000104a46494600010100000100010000ffdb00430006"
+        b"040506050406060506070706080a100a0a09090a140e0f0c1017"
+        b"141818171416161a1d251f1a1b231c1616202c20232627292a29"
+        b"191f2d302d283025282928ffdb0043010707070a080a130a0a13"
+        b"281a161a28282828282828282828282828282828282828282828"
+        b"2828282828282828282828282828282828282828282828282828"
+        b"2828ffc00011080020002003012200021101031101ffc4001f00"
+        b"0001050101010101010000000000000000010203040506070809"
+        b"0a0bffc400b5100002010303020403050504040000017d010203"
+        b"00041105122131410613516107227114328191a1082342b1c115"
+        b"52d1f02433627282090a161718191a25262728292a3435363738"
+        b"393a434445464748494a535455565758595a636465666768696a"
+        b"737475767778797a838485868788898a92939495969798999aa2"
+        b"a3a4a5a6a7a8a9aab2b3b4b5b6b7b8b9bac2c3c4c5c6c7c8c9ca"
+        b"d2d3d4d5d6d7d8d9dae1e2e3e4e5e6e7e8e9eaf1f2f3f4f5f6f7"
+        b"f8f9faffc4001f01000301010101010101010100000000000001"
+        b"02030405060708090a0bffc400b5110002010204040304070504"
+        b"0400010277000102031104052131061241510761711322328108"
+        b"144291a1b1c109233352f0156272d10a162434e125f11718191a"
+        b"262728292a35363738393a434445464748494a53545556575859"
+        b"5a636465666768696a737475767778797a82838485868788898a"
+        b"92939495969798999aa2a3a4a5a6a7a8a9aab2b3b4b5b6b7b8b9"
+        b"bac2c3c4c5c6c7c8c9cad2d3d4d5d6d7d8d9dae2e3e4e5e6e7e8"
+        b"e9eaf2f3f4f5f6f7f8f9faffda000c03010002110311003f00fa"
+        b"a68a28a0028a28a0028a28a0028a28a00fffd9"
+    ),
+    unhexlify(
+        b"ffd8ffe000104a46494600010100000100010000ffdb00430006"
+        b"040506050406060506070706080a100a0a09090a140e0f0c1017"
+        b"141818171416161a1d251f1a1b231c1616202c20232627292a29"
+        b"191f2d302d283025282928ffdb0043010707070a080a130a0a13"
+        b"281a161a28282828282828282828282828282828282828282828"
+        b"2828282828282828282828282828282828282828282828282828"
+        b"2828ffc00011080001000103012200021101031101ffc4001f00"
+        b"0001050101010101010000000000000000010203040506070809"
+        b"0a0bffc400b5100002010303020403050504040000017d010203"
+        b"00041105122131410613516107227114328191a1082342b1c115"
+        b"52d1f02433627282090a161718191a25262728292a3435363738"
+        b"393a434445464748494a535455565758595a636465666768696a"
+        b"737475767778797a838485868788898a92939495969798999aa2"
+        b"a3a4a5a6a7a8a9aab2b3b4b5b6b7b8b9bac2c3c4c5c6c7c8c9ca"
+        b"d2d3d4d5d6d7d8d9dae1e2e3e4e5e6e7e8e9eaf1f2f3f4f5f6f7"
+        b"f8f9faffc4001f01000301010101010101010100000000000001"
+        b"02030405060708090a0bffc400b5110002010204040304070504"
+        b"0400010277000102031104052131061241510761711322328108"
+        b"144291a1b1c109233352f0156272d10a162434e125f11718191a"
+        b"262728292a35363738393a434445464748494a53545556575859"
+        b"5a636465666768696a737475767778797a82838485868788898a"
+        b"92939495969798999aa2a3a4a5a6a7a8a9aab2b3b4b5b6b7b8b9"
+        b"bac2c3c4c5c6c7c8c9cad2d3d4d5d6d7d8d9dae2e3e4e5e6e7e8"
+        b"e9eaf2f3f4f5f6f7f8f9faffda000c03010002110311003f00fa"
+        b"a68a28a00fffd9"
+    ),
+)
+
 small_lossless_webp = TestImage(
     unhexlify(
         b"524946461a000000574542505650384c0d0000002f0000001007" b"1011118888fe0700"

tests/rest/client/test_media.py

@@ -66,6 +66,7 @@
     SVG,
     TestImage,
     empty_file,
+    small_cmyk_jpeg,
     small_lossless_webp,
     small_png,
     small_png_with_transparency,
@@ -1916,6 +1917,7 @@ def test_file_download(self) -> None:
 test_images = [
     small_png,
     small_png_with_transparency,
+    small_cmyk_jpeg,
     small_lossless_webp,
     empty_file,
     SVG,
@@ -2400,7 +2402,7 @@ def _test_thumbnail(
 
             if expected_body is not None:
                 self.assertEqual(
-                    channel.result["body"], expected_body, channel.result["body"]
+                    channel.result["body"], expected_body, channel.result["body"].hex()
                 )
             else:
                 # ensure that the result is at least some valid image

tests/test_utils/__init__.py

@@ -23,6 +23,7 @@
 Utilities for running the unit tests
 """
 
+import base64
 import json
 import sys
 import warnings
@@ -138,3 +139,21 @@ def json(cls, *, code: int = 200, payload: JsonSerializable) -> "FakeResponse":
     b"0000001f15c4890000000a49444154789c63000100000500010d"
     b"0a2db40000000049454e44ae426082"
 )
+
+# A small CMYK-encoded JPEG image used in some tests.
+#
+# Generated with:
+# img = PIL.Image.new('CMYK', (1, 1), (0, 0, 0, 0))
+# img.save('minimal_cmyk.jpg', 'JPEG')
+#
+# Resolution: 1x1, MIME type: image/jpeg, Extension: jpeg, Size: 4 KiB
+SMALL_CMYK_JPEG = base64.b64decode("""
+/9j/7gAOQWRvYmUAZAAAAAAA/9sAQwAIBgYHBgUIBwcHCQkICgwUDQwLCww
+ZEhMPFB0aHx4dGhwcICQuJyAiLCMcHCg3KSwwMTQ0NB8nOT04MjwuMzQy/8
+AAFAgAAQABBEMRAE0RAFkRAEsRAP/EAB8AAAEFAQEBAQEBAAAAAAAAAAABA
+gMEBQYHCAkKC//EALUQAAIBAwMCBAMFBQQEAAABfQECAwAEEQUSITFBBhNR
+YQcicRQygZGhCCNCscEVUtHwJDNicoIJChYXGBkaJSYnKCkqNDU2Nzg5OkN
+ERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6g4SFhoeIiYqSk5SVlp
+eYmZqio6Slpqeoqaqys7S1tre4ubrCw8TFxsfIycrS09TV1tfY2drh4uPk5
+ebn6Onq8fLz9PX29/j5+v/aAA4EQwBNAFkASwAAPwD3+vf69/r3+v/Z
+""")