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gradio/test/test_processing_utils.py

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import os
import pathlib
import shutil
import tempfile
import unittest
from copy import deepcopy
from unittest.mock import patch
import ffmpy
import matplotlib.pyplot as plt
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import numpy as np
import pytest
from PIL import Image
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import gradio as gr
from gradio import media_data
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os.environ["GRADIO_ANALYTICS_ENABLED"] = "False"
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class ImagePreprocessing(unittest.TestCase):
def test_decode_base64_to_image(self):
output_image = gr.processing_utils.decode_base64_to_image(
deepcopy(media_data.BASE64_IMAGE)
)
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self.assertIsInstance(output_image, Image.Image)
def test_encode_url_or_file_to_base64(self):
output_base64 = gr.processing_utils.encode_url_or_file_to_base64(
"gradio/test_data/test_image.png"
)
self.assertEquals(output_base64, deepcopy(media_data.BASE64_IMAGE))
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def test_encode_file_to_base64(self):
output_base64 = gr.processing_utils.encode_file_to_base64(
"gradio/test_data/test_image.png"
)
self.assertEquals(output_base64, deepcopy(media_data.BASE64_IMAGE))
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def test_encode_url_to_base64(self):
output_base64 = gr.processing_utils.encode_url_to_base64(
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"https://raw.githubusercontent.com/gradio-app/gradio/main/gradio/test_data/test_image.png"
)
self.assertEqual(output_base64, deepcopy(media_data.BASE64_IMAGE))
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def test_encode_plot_to_base64(self):
plt.plot([1, 2, 3, 4])
output_base64 = gr.processing_utils.encode_plot_to_base64(plt)
self.assertTrue(
output_base64.startswith("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAo")
)
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def test_encode_array_to_base64(self):
img = Image.open("gradio/test_data/test_image.png")
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img = img.convert("RGB")
numpy_data = np.asarray(img, dtype=np.uint8)
output_base64 = gr.processing_utils.encode_array_to_base64(numpy_data)
self.assertEqual(output_base64, deepcopy(media_data.ARRAY_TO_BASE64_IMAGE))
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def test_encode_pil_to_base64(self):
img = Image.open("gradio/test_data/test_image.png")
img = img.convert("RGB")
img.info = {} # Strip metadata
output_base64 = gr.processing_utils.encode_pil_to_base64(img)
self.assertEqual(output_base64, deepcopy(media_data.ARRAY_TO_BASE64_IMAGE))
def test_encode_pil_to_base64_keeps_pnginfo(self):
input_img = Image.open("gradio/test_data/test_image.png")
input_img = input_img.convert("RGB")
input_img.info = {"key1": "value1", "key2": "value2"}
encoded_image = gr.processing_utils.encode_pil_to_base64(input_img)
decoded_image = gr.processing_utils.decode_base64_to_image(encoded_image)
self.assertEqual(decoded_image.info, input_img.info)
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def test_resize_and_crop(self):
img = Image.open("gradio/test_data/test_image.png")
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new_img = gr.processing_utils.resize_and_crop(img, (20, 20))
self.assertEqual(new_img.size, (20, 20))
self.assertRaises(
ValueError,
gr.processing_utils.resize_and_crop,
**{"img": img, "size": (20, 20), "crop_type": "test"}
)
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class AudioPreprocessing(unittest.TestCase):
def test_audio_from_file(self):
audio = gr.processing_utils.audio_from_file("gradio/test_data/test_audio.wav")
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self.assertEqual(audio[0], 22050)
self.assertIsInstance(audio[1], np.ndarray)
def test_audio_to_file(self):
audio = gr.processing_utils.audio_from_file("gradio/test_data/test_audio.wav")
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gr.processing_utils.audio_to_file(audio[0], audio[1], "test_audio_to_file")
self.assertTrue(os.path.exists("test_audio_to_file"))
os.remove("test_audio_to_file")
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class OutputPreprocessing(unittest.TestCase):
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def test_decode_base64_to_binary(self):
binary = gr.processing_utils.decode_base64_to_binary(
deepcopy(media_data.BASE64_IMAGE)
)
self.assertEqual(deepcopy(media_data.BINARY_IMAGE), binary)
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def test_decode_base64_to_file(self):
temp_file = gr.processing_utils.decode_base64_to_file(
deepcopy(media_data.BASE64_IMAGE)
)
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self.assertIsInstance(temp_file, tempfile._TemporaryFileWrapper)
def test_create_tmp_copy_of_file(self):
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f = tempfile.NamedTemporaryFile(delete=False)
temp_file = gr.processing_utils.create_tmp_copy_of_file(f.name)
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self.assertIsInstance(temp_file, tempfile._TemporaryFileWrapper)
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float_dtype_list = [
float,
float,
np.double,
np.single,
np.float32,
np.float64,
"float32",
"float64",
]
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def test_float_conversion_dtype(self):
"""Test any convertion from a float dtype to an other."""
x = np.array([-1, 1])
# Test all combinations of dtypes conversions
dtype_combin = np.array(
np.meshgrid(
OutputPreprocessing.float_dtype_list,
OutputPreprocessing.float_dtype_list,
)
).T.reshape(-1, 2)
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for dtype_in, dtype_out in dtype_combin:
x = x.astype(dtype_in)
y = gr.processing_utils._convert(x, dtype_out)
assert y.dtype == np.dtype(dtype_out)
def test_subclass_conversion(self):
"""Check subclass conversion behavior"""
x = np.array([-1, 1])
for dtype in OutputPreprocessing.float_dtype_list:
x = x.astype(dtype)
y = gr.processing_utils._convert(x, np.floating)
assert y.dtype == x.dtype
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def test_video_has_playable_codecs(test_file_dir):
assert gr.processing_utils.video_is_playable(
str(test_file_dir / "video_sample.mp4")
)
assert gr.processing_utils.video_is_playable(
str(test_file_dir / "video_sample.ogg")
)
assert gr.processing_utils.video_is_playable(
str(test_file_dir / "video_sample.webm")
)
assert not gr.processing_utils.video_is_playable(
str(test_file_dir / "bad_video_sample.mp4")
)
def raise_ffmpy_runtime_exception(*args, **kwargs):
raise ffmpy.FFRuntimeError("", "", "", "")
@pytest.mark.parametrize(
"exception_to_raise", [raise_ffmpy_runtime_exception, KeyError(), IndexError()]
)
def test_video_has_playable_codecs_catches_exceptions(
exception_to_raise, test_file_dir
):
with patch("ffmpy.FFprobe.run", side_effect=exception_to_raise):
with tempfile.NamedTemporaryFile(suffix="out.avi") as tmp_not_playable_vid:
shutil.copy(
str(test_file_dir / "bad_video_sample.mp4"), tmp_not_playable_vid.name
)
assert gr.processing_utils.video_is_playable(tmp_not_playable_vid.name)
def test_convert_video_to_playable_mp4(test_file_dir):
with tempfile.NamedTemporaryFile(suffix="out.avi") as tmp_not_playable_vid:
shutil.copy(
str(test_file_dir / "bad_video_sample.mp4"), tmp_not_playable_vid.name
)
playable_vid = gr.processing_utils.convert_video_to_playable_mp4(
tmp_not_playable_vid.name
)
assert gr.processing_utils.video_is_playable(playable_vid)
@patch("ffmpy.FFmpeg.run", side_effect=raise_ffmpy_runtime_exception)
def test_video_conversion_returns_original_video_if_fails(mock_run, test_file_dir):
with tempfile.NamedTemporaryFile(suffix="out.avi") as tmp_not_playable_vid:
shutil.copy(
str(test_file_dir / "bad_video_sample.mp4"), tmp_not_playable_vid.name
)
playable_vid = gr.processing_utils.convert_video_to_playable_mp4(
tmp_not_playable_vid.name
)
# If the conversion succeeded it'd be .mp4
assert pathlib.Path(playable_vid).suffix == ".avi"
if __name__ == "__main__":
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unittest.main()