107 lines
3.7 KiB
Python
107 lines
3.7 KiB
Python
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from pathlib import Path
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import io
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import pytest
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from matplotlib import ft2font
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from matplotlib.testing.decorators import check_figures_equal
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import matplotlib.font_manager as fm
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import matplotlib.pyplot as plt
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def test_fallback_errors():
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file_name = fm.findfont('DejaVu Sans')
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with pytest.raises(TypeError, match="Fallback list must be a list"):
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# failing to be a list will fail before the 0
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ft2font.FT2Font(file_name, _fallback_list=(0,)) # type: ignore[arg-type]
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with pytest.raises(
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TypeError, match="Fallback fonts must be FT2Font objects."
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):
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ft2font.FT2Font(file_name, _fallback_list=[0]) # type: ignore[list-item]
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def test_ft2font_positive_hinting_factor():
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file_name = fm.findfont('DejaVu Sans')
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with pytest.raises(
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ValueError, match="hinting_factor must be greater than 0"
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):
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ft2font.FT2Font(file_name, 0)
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def test_fallback_smoke():
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fp = fm.FontProperties(family=["WenQuanYi Zen Hei"])
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if Path(fm.findfont(fp)).name != "wqy-zenhei.ttc":
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pytest.skip("Font wqy-zenhei.ttc may be missing")
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fp = fm.FontProperties(family=["Noto Sans CJK JP"])
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if Path(fm.findfont(fp)).name != "NotoSansCJK-Regular.ttc":
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pytest.skip("Noto Sans CJK JP font may be missing.")
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plt.rcParams['font.size'] = 20
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fig = plt.figure(figsize=(4.75, 1.85))
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fig.text(0.05, 0.45, "There are 几个汉字 in between!",
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family=['DejaVu Sans', "Noto Sans CJK JP"])
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fig.text(0.05, 0.25, "There are 几个汉字 in between!",
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family=['DejaVu Sans', "WenQuanYi Zen Hei"])
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fig.text(0.05, 0.65, "There are 几个汉字 in between!",
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family=["Noto Sans CJK JP"])
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fig.text(0.05, 0.85, "There are 几个汉字 in between!",
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family=["WenQuanYi Zen Hei"])
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# TODO enable fallback for other backends!
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for fmt in ['png', 'raw']: # ["svg", "pdf", "ps"]:
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fig.savefig(io.BytesIO(), format=fmt)
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@pytest.mark.parametrize('family_name, file_name',
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[("WenQuanYi Zen Hei", "wqy-zenhei"),
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("Noto Sans CJK JP", "NotoSansCJK")]
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)
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@check_figures_equal(extensions=["png", "pdf", "eps", "svg"])
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def test_font_fallback_chinese(fig_test, fig_ref, family_name, file_name):
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fp = fm.FontProperties(family=[family_name])
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if file_name not in Path(fm.findfont(fp)).name:
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pytest.skip(f"Font {family_name} ({file_name}) is missing")
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text = ["There are", "几个汉字", "in between!"]
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plt.rcParams["font.size"] = 20
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test_fonts = [["DejaVu Sans", family_name]] * 3
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ref_fonts = [["DejaVu Sans"], [family_name], ["DejaVu Sans"]]
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for j, (txt, test_font, ref_font) in enumerate(
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zip(text, test_fonts, ref_fonts)
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):
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fig_ref.text(0.05, .85 - 0.15*j, txt, family=ref_font)
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fig_test.text(0.05, .85 - 0.15*j, txt, family=test_font)
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@pytest.mark.parametrize(
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"family_name, file_name",
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[
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("WenQuanYi Zen Hei", "wqy-zenhei"),
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("Noto Sans CJK JP", "NotoSansCJK"),
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],
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)
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def test__get_fontmap(family_name, file_name):
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fp = fm.FontProperties(family=[family_name])
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found_file_name = Path(fm.findfont(fp)).name
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if file_name not in found_file_name:
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pytest.skip(f"Font {family_name} ({file_name}) is missing")
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text = "There are 几个汉字 in between!"
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ft = fm.get_font(
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fm.fontManager._find_fonts_by_props(
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fm.FontProperties(family=["DejaVu Sans", family_name])
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)
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)
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fontmap = ft._get_fontmap(text)
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for char, font in fontmap.items():
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if ord(char) > 127:
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assert Path(font.fname).name == found_file_name
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else:
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assert Path(font.fname).name == "DejaVuSans.ttf"
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