diffusers/src/diffusers/testing_utils.py at main · Dullson/diffusers

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import os

import random

import re

import unittest

from distutils.util import strtobool

from pathlib import Path

from typing import Union

import torch

import PIL.Image

import PIL.ImageOps

import requests

from packaging import version

global_rng = random.Random()

torch_device = "cuda" if torch.cuda.is_available() else "cpu"

is_torch_higher_equal_than_1_12 = version.parse(version.parse(torch.__version__).base_version) >= version.parse("1.12")

if is_torch_higher_equal_than_1_12:

torch_device = "mps" if torch.backends.mps.is_available() else torch_device

def parse_flag_from_env(key, default=False):

try:

value = os.environ[key]

except KeyError:

# KEY isn't set, default to `default`.

_value = default

else:

# KEY is set, convert it to True or False.

try:

_value = strtobool(value)

except ValueError:

# More values are supported, but let's keep the message simple.

raise ValueError(f"If set, {key} must be yes or no.")

return _value

_run_slow_tests = parse_flag_from_env("RUN_SLOW", default=False)

def floats_tensor(shape, scale=1.0, rng=None, name=None):

"""Creates a random float32 tensor"""

if rng is None:

rng = global_rng

total_dims = 1

for dim in shape:

total_dims *= dim

values = []

for _ in range(total_dims):

values.append(rng.random() * scale)

return torch.tensor(data=values, dtype=torch.float).view(shape).contiguous()

def slow(test_case):

"""

Decorator marking a test as slow.

Slow tests are skipped by default. Set the RUN_SLOW environment variable to a truthy value to run them.

"""

return unittest.skipUnless(_run_slow_tests, "test is slow")(test_case)

def load_image(image: Union[str, PIL.Image.Image]) -> PIL.Image.Image:

"""

Args:

Loads `image` to a PIL Image.

image (`str` or `PIL.Image.Image`):

The image to convert to the PIL Image format.

Returns:

`PIL.Image.Image`: A PIL Image.

"""

if isinstance(image, str):

if image.startswith("http://") or image.startswith("https://"):

image = PIL.Image.open(requests.get(image, stream=True).raw)

elif os.path.isfile(image):

image = PIL.Image.open(image)

else:

raise ValueError(

f"Incorrect path or url, URLs must start with `http://` or `https://`, and {image} is not a valid path"

)

elif isinstance(image, PIL.Image.Image):

image = image

else:

raise ValueError(

"Incorrect format used for image. Should be an url linking to an image, a local path, or a PIL image."

)

image = PIL.ImageOps.exif_transpose(image)

image = image.convert("RGB")

return image

# --- pytest conf functions --- #

# to avoid multiple invocation from tests/conftest.py and examples/conftest.py - make sure it's called only once

pytest_opt_registered = {}

def pytest_addoption_shared(parser):

"""

This function is to be called from `conftest.py` via `pytest_addoption` wrapper that has to be defined there.

It allows loading both `conftest.py` files at once without causing a failure due to adding the same `pytest`

option.

"""

option = "--make-reports"

if option not in pytest_opt_registered:

parser.addoption(

option,

action="store",

default=False,

help="generate report files. The value of this option is used as a prefix to report names",

)

pytest_opt_registered[option] = 1

def pytest_terminal_summary_main(tr, id):

"""

Generate multiple reports at the end of test suite run - each report goes into a dedicated file in the current

directory. The report files are prefixed with the test suite name.

This function emulates --duration and -rA pytest arguments.

This function is to be called from `conftest.py` via `pytest_terminal_summary` wrapper that has to be defined

there.

Args:

- tr: `terminalreporter` passed from `conftest.py`

- id: unique id like `tests` or `examples` that will be incorporated into the final reports filenames - this is

needed as some jobs have multiple runs of pytest, so we can't have them overwrite each other.

NB: this functions taps into a private _pytest API and while unlikely, it could break should

pytest do internal changes - also it calls default internal methods of terminalreporter which

can be hijacked by various `pytest-` plugins and interfere.

"""

from _pytest.config import create_terminal_writer

if not len(id):

id = "tests"

config = tr.config

orig_writer = config.get_terminal_writer()

orig_tbstyle = config.option.tbstyle

orig_reportchars = tr.reportchars

dir = "reports"

Path(dir).mkdir(parents=True, exist_ok=True)

report_files = {

k: f"{dir}/{id}_{k}.txt"

for k in [

"durations",

"errors",

"failures_long",

"failures_short",

"failures_line",

"passes",

"stats",

"summary_short",

"warnings",

]

}

# custom durations report

# note: there is no need to call pytest --durations=XX to get this separate report

# adapted from https://github.com/pytest-dev/pytest/blob/897f151e/src/_pytest/runner.py#L66

dlist = []

for replist in tr.stats.values():

for rep in replist:

if hasattr(rep, "duration"):

dlist.append(rep)

if dlist:

dlist.sort(key=lambda x: x.duration, reverse=True)

with open(report_files["durations"], "w") as f:

durations_min = 0.05 # sec

f.write("slowest durations\n")

for i, rep in enumerate(dlist):

if rep.duration < durations_min:

f.write(f"{len(dlist)-i} durations < {durations_min} secs were omitted")

break

f.write(f"{rep.duration:02.2f}s {rep.when:<8} {rep.nodeid}\n")

def summary_failures_short(tr):

# expecting that the reports were --tb=long (default) so we chop them off here to the last frame

reports = tr.getreports("failed")

if not reports:

return

tr.write_sep("=", "FAILURES SHORT STACK")

for rep in reports:

msg = tr._getfailureheadline(rep)

tr.write_sep("_", msg, red=True, bold=True)

# chop off the optional leading extra frames, leaving only the last one

longrepr = re.sub(r".*_ _ _ (_ ){10,}_ _ ", "", rep.longreprtext, 0, re.M | re.S)

tr._tw.line(longrepr)

# note: not printing out any rep.sections to keep the report short

# use ready-made report funcs, we are just hijacking the filehandle to log to a dedicated file each

# adapted from https://github.com/pytest-dev/pytest/blob/897f151e/src/_pytest/terminal.py#L814

# note: some pytest plugins may interfere by hijacking the default `terminalreporter` (e.g.

# pytest-instafail does that)

# report failures with line/short/long styles

config.option.tbstyle = "auto" # full tb

with open(report_files["failures_long"], "w") as f: