"""Test images util."""

from __future__ import annotations

import pytest

from sphinx.util.images import (

get_image_extension,

get_image_size,

guess_mimetype,

parse_data_uri,

)

TYPE_CHECKING = False

if TYPE_CHECKING:

from pathlib import Path

GIF_FILENAME = 'img.gif'

PNG_FILENAME = 'img.png'

PDF_FILENAME = 'img.pdf'

TXT_FILENAME = 'index.txt'

def test_get_image_size(rootdir: Path) -> None:

assert get_image_size(rootdir / 'test-root' / GIF_FILENAME) == (200, 181)

assert get_image_size(rootdir / 'test-root' / PNG_FILENAME) == (200, 181)

assert get_image_size(rootdir / 'test-root' / PDF_FILENAME) is None

assert get_image_size(rootdir / 'test-root' / TXT_FILENAME) is None

@pytest.mark.filterwarnings('ignore:The content argument')

def test_guess_mimetype() -> None:

# guess by filename

assert guess_mimetype('img.png') == 'image/png'

assert guess_mimetype('img.jpg') == 'image/jpeg'

assert guess_mimetype('img.txt') is None

assert guess_mimetype('img.txt', default='text/plain') == 'text/plain'

assert guess_mimetype('no_extension') is None

assert guess_mimetype('IMG.PNG') == 'image/png'

# default parameter is used when no extension

assert guess_mimetype('img.png', 'text/plain') == 'image/png'

assert guess_mimetype('no_extension', 'text/plain') == 'text/plain'

def test_get_image_extension() -> None:

assert get_image_extension('image/png') == '.png'

assert get_image_extension('image/jpeg') == '.jpg'

assert get_image_extension('image/svg+xml') == '.svg'

assert get_image_extension('text/plain') is None

def test_parse_data_uri() -> None:

# standard case

uri = (

'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4'

'//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=='

)

image = parse_data_uri(uri)

assert image is not None

assert image.mimetype == 'image/png'

assert image.charset == 'US-ASCII'

# no mimetype

uri = (

'data:charset=utf-8,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElE'

'QVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=='

)

image = parse_data_uri(uri)

assert image is not None

assert image.mimetype == 'text/plain'

assert image.charset == 'utf-8'

# non data URI

uri = (

'image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4'

'//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=='

)

image = parse_data_uri(uri)

assert image is None

# invalid data URI (no properties)

uri = (

'data:iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4'

'//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=='

)

with pytest.raises(ValueError, match=r'malformed data URI'):

parse_data_uri(uri)

# not base64

uri = (

'data:image/svg+xml,%3Csvg%20width%3D%22100%22%20height%3D%22100%22%20'

'xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%3E%3Ccircle%20cx'

'%3D%2250%22%20cy%3D%2250%22%20r%3D%2240%22%20fill%3D%22blue%22%2F%3E'

'%3C%2Fsvg%3E'

)

image = parse_data_uri(uri)

assert image is not None

assert image.mimetype == 'image/svg+xml'

assert b'%' not in image.data