You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
1.7 KiB
Python
68 lines
1.7 KiB
Python
from io import BytesIO
|
|
import glob
|
|
import os
|
|
from pathlib import Path
|
|
|
|
import numpy as np
|
|
import pytest
|
|
|
|
from matplotlib.testing.decorators import image_comparison
|
|
from matplotlib import pyplot as plt
|
|
import matplotlib.cm as cm
|
|
|
|
|
|
@image_comparison(['pngsuite.png'], tol=0.03)
|
|
def test_pngsuite():
|
|
dirname = os.path.join(
|
|
os.path.dirname(__file__),
|
|
'baseline_images',
|
|
'pngsuite')
|
|
files = sorted(glob.iglob(os.path.join(dirname, 'basn*.png')))
|
|
|
|
plt.figure(figsize=(len(files), 2))
|
|
|
|
for i, fname in enumerate(files):
|
|
data = plt.imread(fname)
|
|
cmap = None # use default colormap
|
|
if data.ndim == 2:
|
|
# keep grayscale images gray
|
|
cmap = cm.gray
|
|
plt.imshow(data, extent=[i, i + 1, 0, 1], cmap=cmap)
|
|
|
|
plt.gca().patch.set_facecolor("#ddffff")
|
|
plt.gca().set_xlim(0, len(files))
|
|
|
|
|
|
def test_imread_png_uint16():
|
|
from matplotlib import _png
|
|
with (Path(__file__).parent
|
|
/ 'baseline_images/test_png/uint16.png').open('rb') as file:
|
|
img = _png.read_png_int(file)
|
|
assert (img.dtype == np.uint16)
|
|
assert np.sum(img.flatten()) == 134184960
|
|
|
|
|
|
def test_truncated_file(tmpdir):
|
|
d = tmpdir.mkdir('test')
|
|
fname = str(d.join('test.png'))
|
|
fname_t = str(d.join('test_truncated.png'))
|
|
plt.savefig(fname)
|
|
with open(fname, 'rb') as fin:
|
|
buf = fin.read()
|
|
with open(fname_t, 'wb') as fout:
|
|
fout.write(buf[:20])
|
|
|
|
with pytest.raises(Exception):
|
|
plt.imread(fname_t)
|
|
|
|
|
|
def test_truncated_buffer():
|
|
b = BytesIO()
|
|
plt.savefig(b)
|
|
b.seek(0)
|
|
b2 = BytesIO(b.read(20))
|
|
b2.seek(0)
|
|
|
|
with pytest.raises(Exception):
|
|
plt.imread(b2)
|