def test_image_comparison_expect_rms(im1, im2, tol, expect_rms):
"""
Compare two images, expecting a particular RMS error.
im1 and im2 are filenames relative to the baseline_dir directory.
tol is the tolerance to pass to compare_images.
expect_rms is the expected RMS value, or None. If None, the test will
succeed if compare_images succeeds. Otherwise, the test will succeed if
compare_images fails and returns an RMS error almost equal to this value.
"""
baseline_dir, result_dir = map(Path, _image_directories(lambda: "dummy"))
# Copy both "baseline" and "test" image to result_dir, so that 1)
# compare_images writes the diff to result_dir, rather than to the source
# tree and 2) the baseline image doesn't appear missing to triage_tests.py.
result_im1 = make_test_filename(result_dir / im1, "expected")
shutil.copyfile(baseline_dir / im1, result_im1)
result_im2 = result_dir / im1
shutil.copyfile(baseline_dir / im2, result_im2)
results = compare_images(result_im1,
result_im2,
tol=tol,
in_decorator=True)
if expect_rms is None:
assert results is None
else:
assert results is not None
assert results['rms'] == approx(expect_rms, abs=1e-4)
# -*- encoding: utf-8 -*-
import os
import shutil
import numpy as np
import nose
from nose.plugins.skip import SkipTest
import matplotlib as mpl
import matplotlib.pyplot as plt
from matplotlib.compat import subprocess
from matplotlib.testing.compare import compare_images, ImageComparisonFailure
from matplotlib.testing.decorators import _image_directories
baseline_dir, result_dir = _image_directories(lambda: 'dummy func')
def check_for(texsystem):
header = r"""
\documentclass{minimal}
\usepackage{pgf}
\begin{document}
\typeout{pgfversion=\pgfversion}
\makeatletter
\@@end
"""
try:
latex = subprocess.Popen(["xelatex", "-halt-on-error"],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE)
stdout, stderr = latex.communicate(header.encode("utf8"))
except OSError:
unicode_literals)
import os
import shutil
import numpy as np
from nose.plugins.skip import SkipTest
import matplotlib as mpl
import matplotlib.pyplot as plt
from matplotlib.compat import subprocess
from matplotlib.testing.compare import compare_images, ImageComparisonFailure
from matplotlib.testing.decorators import (_image_directories, switch_backend,
cleanup)
baseline_dir, result_dir = _image_directories(lambda: 'dummy func')
def check_for(texsystem):
header = """
\\documentclass{minimal}
\\usepackage{pgf}
\\begin{document}
\\typeout{pgfversion=\\pgfversion}
\\makeatletter
\\@@end
"""
try:
latex = subprocess.Popen([texsystem, "-halt-on-error"],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE)
def _image_directories(cls):
return _image_directories(func)
