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import inspect

import logging

import os

import random

import re

import unittest

import urllib.parse

from distutils.util import strtobool

from io import BytesIO, StringIO

from pathlib import Path

from typing import Union

import numpy as np

import PIL.Image

import PIL.ImageOps

import requests

from packaging import version

from .import_utils import is_flax_available, is_onnx_available, is_torch_available

global_rng = random.Random()

if is_torch_available():

import torch

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:

# Some builds of torch 1.12 don't have the mps backend registered. See #892 for more details

mps_backend_registered = hasattr(torch.backends, "mps")

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

def torch_all_close(a, b, *args, **kwargs):

if not is_torch_available():

raise ValueError("PyTorch needs to be installed to use this function.")

if not torch.allclose(a, b, *args, **kwargs):

assert False, f"Max diff is absolute {(a - b).abs().max()}. Diff tensor is {(a - b).abs()}."

return True

def get_tests_dir(append_path=None):

"""

Args:

append_path: optional path to append to the tests dir path

Return:

The full path to the `tests` dir, so that the tests can be invoked from anywhere. Optionally `append_path` is

joined after the `tests` dir the former is provided.

"""

# this function caller's __file__

caller__file__ = inspect.stack()[1][1]

tests_dir = os.path.abspath(os.path.dirname(caller__file__))

while not tests_dir.endswith("tests"):

tests_dir = os.path.dirname(tests_dir)

if append_path:

return os.path.join(tests_dir, append_path)

else:

return tests_dir

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)

_run_nightly_tests = parse_flag_from_env("RUN_NIGHTLY", 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 nightly(test_case):

"""

Decorator marking a test that runs nightly in the diffusers CI.

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

"""

return unittest.skipUnless(_run_nightly_tests, "test is nightly")(test_case)

def require_torch(test_case):

"""

Decorator marking a test that requires PyTorch. These tests are skipped when PyTorch isn't installed.

"""

return unittest.skipUnless(is_torch_available(), "test requires PyTorch")(test_case)

def require_torch_gpu(test_case):

"""Decorator marking a test that requires CUDA and PyTorch."""

return unittest.skipUnless(is_torch_available() and torch_device == "cuda", "test requires PyTorch+CUDA")(

test_case

)

def require_flax(test_case):

"""

Decorator marking a test that requires JAX & Flax. These tests are skipped when one / both are not installed

"""

return unittest.skipUnless(is_flax_available(), "test requires JAX & Flax")(test_case)

def require_onnxruntime(test_case):

"""

Decorator marking a test that requires onnxruntime. These tests are skipped when onnxruntime isn't installed.

"""

return unittest.skipUnless(is_onnx_available(), "test requires onnxruntime")(test_case)

def load_numpy(arry: Union[str, np.ndarray]) -> np.ndarray:

if isinstance(arry, str):

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

response = requests.get(arry)

response.raise_for_status()

arry = np.load(BytesIO(response.content))

elif os.path.isfile(arry):

arry = np.load(arry)

else:

raise ValueError(

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

)

elif isinstance(arry, np.ndarray):

pass

else:

raise ValueError(

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

" ndarray."

)

return arry

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

def load_hf_numpy(path) -> np.ndarray:

if not path.startswith("http://") or path.startswith("https://"):

path = os.path.join(

"https://huggingface.co/datasets/fusing/diffusers-testing/resolve/main", urllib.parse.quote(path)

)

return load_numpy(path)

# --- 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: