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111 lines
3.4 KiB
Python
111 lines
3.4 KiB
Python
from __future__ import annotations
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import os
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from pathlib import Path
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from typing import AnyStr
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import pytest
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from PIL import FontFile, Image, ImageDraw, ImageFont, PcfFontFile
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from .helper import (
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assert_image_equal_tofile,
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assert_image_similar_tofile,
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skip_unless_feature,
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)
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fontname = "Tests/fonts/10x20-ISO8859-1.pcf"
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message = "hello, world"
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pytestmark = skip_unless_feature("zlib")
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def save_font(request: pytest.FixtureRequest, tmp_path: Path) -> str:
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with open(fontname, "rb") as test_file:
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font = PcfFontFile.PcfFontFile(test_file)
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assert isinstance(font, FontFile.FontFile)
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# check the number of characters in the font
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assert len([_f for _f in font.glyph if _f]) == 223
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tempname = str(tmp_path / "temp.pil")
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def delete_tempfile() -> None:
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try:
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os.remove(tempname[:-4] + ".pbm")
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except OSError:
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pass # report?
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request.addfinalizer(delete_tempfile)
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font.save(tempname)
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with Image.open(tempname.replace(".pil", ".pbm")) as loaded:
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assert_image_equal_tofile(loaded, "Tests/fonts/10x20.pbm")
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with open(tempname, "rb") as f_loaded:
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with open("Tests/fonts/10x20.pil", "rb") as f_target:
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assert f_loaded.read() == f_target.read()
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return tempname
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def test_sanity(request: pytest.FixtureRequest, tmp_path: Path) -> None:
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save_font(request, tmp_path)
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def test_less_than_256_characters() -> None:
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with open("Tests/fonts/10x20-ISO8859-1-fewer-characters.pcf", "rb") as test_file:
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font = PcfFontFile.PcfFontFile(test_file)
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assert isinstance(font, FontFile.FontFile)
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# check the number of characters in the font
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assert len([_f for _f in font.glyph if _f]) == 127
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def test_invalid_file() -> None:
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with open("Tests/images/flower.jpg", "rb") as fp:
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with pytest.raises(SyntaxError):
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PcfFontFile.PcfFontFile(fp)
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def test_draw(request: pytest.FixtureRequest, tmp_path: Path) -> None:
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tempname = save_font(request, tmp_path)
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font = ImageFont.load(tempname)
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im = Image.new("L", (130, 30), "white")
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draw = ImageDraw.Draw(im)
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draw.text((0, 0), message, "black", font=font)
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assert_image_similar_tofile(im, "Tests/images/test_draw_pbm_target.png", 0)
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def test_textsize(request: pytest.FixtureRequest, tmp_path: Path) -> None:
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tempname = save_font(request, tmp_path)
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font = ImageFont.load(tempname)
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for i in range(255):
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(ox, oy, dx, dy) = font.getbbox(chr(i))
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assert ox == 0
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assert oy == 0
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assert dy == 20
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assert dx in (0, 10)
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assert font.getlength(chr(i)) == dx
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for i in range(len(message)):
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msg = message[: i + 1]
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assert font.getlength(msg) == len(msg) * 10
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assert font.getbbox(msg) == (0, 0, len(msg) * 10, 20)
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def _test_high_characters(
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request: pytest.FixtureRequest, tmp_path: Path, message: AnyStr
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) -> None:
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tempname = save_font(request, tmp_path)
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font = ImageFont.load(tempname)
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im = Image.new("L", (750, 30), "white")
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draw = ImageDraw.Draw(im)
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draw.text((0, 0), message, "black", font=font)
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assert_image_similar_tofile(im, "Tests/images/high_ascii_chars.png", 0)
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def test_high_characters(request: pytest.FixtureRequest, tmp_path: Path) -> None:
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message = "".join(chr(i + 1) for i in range(140, 232))
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_test_high_characters(request, tmp_path, message)
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# accept bytes instances.
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_test_high_characters(request, tmp_path, message.encode("latin1"))
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