def expect_fig(fig: go.Figure, filename: str, check: bool) -> None:
"""Check for pixel-for-pixel equivalence to stored image."""
ext = "png"
if check:
found = fig.to_image(format=ext)
try:
file = open(filename + "." + ext, "rb")
expected = file.read()
if expected != found:
print(f"{filename}: differs from reference image.")
raise FileNotFoundError(errno.ENOENT,
os.strerror(errno.ENOENT),
filename + ".new." + ext)
print(f"{filename}: image identical.")
# fig.show(config=default_config())
except FileNotFoundError as e:
file_new = open(e.filename, "wb")
file_new.write(found)
print(f"{filename}: creating new reference image.")
fig.show(config=default_config())
assert False
else:
print(f"{filename}: image not compared.")
def ploty_fig_to_image(fig: go.Figure, width: int = 360, height: int = 360):
fig_data = fig.to_image(format='svg', width=width, height=height).decode()
return img(src=f'data:image/svg+xml;base64,{fig_data}',
className='img-fluid',
style=f'width: 100%; height: auto')
