bug#42409: weasyprint fails to build

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

Hello,

Michael Rohleder <mike@rohleder.de> writes:

> weasyprint fails in tests:
>
> ...
> =================================== FAILURES ===================================
>
>
>     @assert_no_logs
>     @requires('cairo', (1, 12, 0))
>     def test_acid2():
>         def render(filename):
>             return HTML(resource_filename(filename)).render(enable_hinting=True)
>     
>         with capture_logs():
>             # This is a copy of http://www.webstandards.org/files/acid2/test.html
>             document = render('acid2-test.html')
>             intro_page, test_page = document.pages
>             # Ignore the intro page: it is not in the reference
>             test_image, width, height = document.copy(
>                 [test_page]).write_image_surface()
>     
>         # This is a copy of http://www.webstandards.org/files/acid2/reference.html
>         ref_image, ref_width, ref_height = render(
>             'acid2-reference.html').write_image_surface()
>     
>         assert (width, height) == (ref_width, ref_height)
>>       assert_pixels_equal(
>             'acid2', width, height, image_to_pixels(test_image, width, height),
>             image_to_pixels(ref_image, width, height), tolerance=2)
>
> weasyprint/tests/test_acid2.py:37: 
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
>
> name = 'acid2', width = 794, height = 1123
> raw = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00...00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
> expected_raw = b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00...00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
> tolerance = 2
>
>     def assert_pixels_equal(name, width, height, raw, expected_raw, tolerance=0):
>         """Take 2 matrices of pixels and assert that they are the same."""
>         if raw != expected_raw:  # pragma: no cover
>             for i, (value, expected) in enumerate(zip(raw, expected_raw)):
>                 if abs(value - expected) > tolerance:
>                     write_png(name, raw, width, height)
>                     write_png(name + '.expected', expected_raw,
>                               width, height)
>                     pixel_n = i // 4
>                     x = pixel_n // width
>                     y = pixel_n % width
>                     i % 4
>                     pixel = tuple(list(raw[i:i + 4]))
>                     expected_pixel = tuple(list(
>                         expected_raw[i:i + 4]))
>>                   assert 0, (
>                         'Pixel (%i, %i) in %s: expected rgba%s, got rgba%s'
>                         % (x, y, name, expected_pixel, pixel))
> E                   AssertionError: Pixel (124, 160) in acid2: expected rgba(191, 127, 127, 255), got rgba(128, 0, 0, 255)
>
> weasyprint/tests/test_draw/__init__.py:163: AssertionError
>
> INFO weasyprint.progress:__init__.py:106 Step 1 - Fetching and parsing
> HTML -
> /tmp/guix-build-weasyprint-51.drv-0/WeasyPrint-51/weasyprint/tests/resources/acid2-test.html
> INFO     weasyprint.progress:__init__.py:315 Step 2 - Fetching and parsing CSS - CSS string
> WARNING weasyprint:__init__.py:825 Invalid or unsupported selector
> '[class=second two] ', (<IdentToken two>, 'expected ], got ident')
> WARNING  weasyprint:__init__.py:86 Ignored `error: \}` at 90:74, unknown property.
> WARNING  weasyprint:__init__.py:86 Ignored `m
> rgin: 2em` at 93:14, unknown property.
> WARNING  weasyprint:__init__.py:825 Invalid or unsupported selector ';
>    .parser ', (<LiteralToken ;>, 'expected a compound selector, got literal')
> WARNING  weasyprint:__init__.py:86 Ignored `width: 200` at 95:14, invalid value.
> WARNING  weasyprint:__init__.py:86 Ignored `border: 5em solid red ! error` at 96:14, invalid value.
> WARNING  weasyprint:__init__.py:86 Ignored `background: red pink` at 97:14, invalid value.
> INFO weasyprint.progress:__init__.py:315 Step 2 - Fetching and parsing
> CSS - data:text/css,.picture%20%7B%20background%3A%20none%3B%20%7D
> INFO     weasyprint.progress:__init__.py:67 Step 3 - Applying CSS
> INFO     weasyprint.progress:document.py:371 Step 4 - Creating formatting structure
> ERROR weasyprint:images.py:231 Failed to load image at
> "file:///tmp/guix-build-weasyprint-51.drv-0/WeasyPrint-51/weasyprint/tests/resources/404"
> (URLError: <urlopen error [Errno 2] No such file or directory:
> '/tmp/guix-build-weasyprint-51.drv-0/WeasyPrint-51/weasyprint/tests/resources/404'>)
> ERROR weasyprint:images.py:231 Failed to load image at
> "data:application/x-unknown,ERROR" (Pixbuf error: Unrecognized image
> file format)
> INFO     weasyprint.progress:pages.py:798 Step 5 - Creating layout - Page 1
> INFO     weasyprint.progress:pages.py:798 Step 5 - Creating layout - Page 2
> INFO     weasyprint.progress:document.py:751 Step 6 - Drawing
> INFO weasyprint.progress:__init__.py:106 Step 1 - Fetching and parsing
> HTML -
> /tmp/guix-build-weasyprint-51.drv-0/WeasyPrint-51/weasyprint/tests/resources/acid2-reference.html
> INFO     weasyprint.progress:__init__.py:315 Step 2 - Fetching and parsing CSS - CSS string
> INFO     weasyprint.progress:__init__.py:67 Step 3 - Applying CSS
> INFO     weasyprint.progress:document.py:371 Step 4 - Creating formatting structure
> INFO     weasyprint.progress:pages.py:798 Step 5 - Creating layout - Page 1
> INFO     weasyprint.progress:document.py:751 Step 6 - Drawing
>
>
>     @assert_no_logs
>     def test_line_content():
>         for width, remaining in [(100, 'text for test'),
>                                  (45, 'is a text for test')]:
>             text = 'This is a text for test'
>             _, length, resume_at, _, _, _ = make_text(
>                 text, width, font_family=SANS_FONTS.split(','), font_size=19)
>>           assert text[resume_at:] == remaining
> E           AssertionError: assert 'a text for test' == 'text for test'
> E             - a text for test
> E             ? --
> E             + text for test
>
> ../../../WeasyPrint-51/weasyprint/tests/test_text.py:37: AssertionError
>
>     @assert_no_logs
>     def test_line_breaking():
>         string = 'Thïs is a text for test'
>     
>         # These two tests do not really rely on installed fonts
>         _, _, resume_at, _, _, _ = make_text(string, 90, font_size=1)
>         assert resume_at is None
>     
>         _, _, resume_at, _, _, _ = make_text(string, 90, font_size=100)
>         assert string.encode('utf-8')[resume_at:].decode('utf-8') == (
>             'is a text for test')
>     
>         _, _, resume_at, _, _, _ = make_text(
>             string, 100, font_family=SANS_FONTS.split(','), font_size=19)
>>       assert string.encode('utf-8')[resume_at:].decode('utf-8') == (
>             'text for test')
> E       AssertionError: assert 'a text for test' == 'text for test'
> E         - a text for test
> E         ? --
> E         + text for test
>
> ../../../WeasyPrint-51/weasyprint/tests/test_text.py:62: AssertionError
>
> ...
>
> = 41 failed, 1132 passed, 1 deselected, 7 xfailed, 1 warning in 84.56s (0:01:24) =
> command "pytest" "-k" "not test_flex_column_wrap_reverse" failed with status 1
> builder for `/gnu/store/5c9h7c9pnrbpmk1015vrckrwsf5hd5xr-weasyprint-51.drv' failed with exit code 1

These failures were due to the 'DejaVu Sans' font not being available.
This is now fixed, along with an updated Weasyprint and some of its
dependencies, as of commit c601e2bf9adb05dc9dd9f3a565f693e968eb785c.

Thank you for the report!

Closing.

Maxim