def test_no_app1_segment(self):
"""Verify behavior of an image without an APP1 segment marker.
Assert the ``has_exif`` attribute is false. Verify non-EXIF ``dir()`` list contents. Then,
check the ``get_file()`` hexadecimal.
"""
image_path = os.path.join(os.path.dirname(__file__), "no_app1.png")
with open(image_path, "rb") as image_file:
my_image = Image(image_file)
self.assertFalse(my_image.has_exif)
self.assertEqual(
str(dir(my_image)),
Baseline("""
['_segments', 'delete', 'delete_all', 'get', 'get_all', 'get_file', 'get_thumbnail', 'has_exif', 'list_all']
"""),
)
with pytest.raises(RuntimeError,
match="image does not contain thumbnail"):
my_image.get_thumbnail()
self.assertEqual(
"\n".join(textwrap.wrap(str(my_image.get_file()), 90)),
NO_APP1_PNG)
def test_get_thumbnail():
"""Test file contents of thumbnail image."""
with open(os.path.join(os.path.dirname(__file__), "grand_canyon.jpg"),
"rb") as image_file:
image = Image(image_file)
file_hex = binascii.hexlify(image.get_thumbnail()).decode("utf8")
assert "\n".join(textwrap.wrap(file_hex, 90)) == GRAND_CANYON_THUMBNAIL
