69 lines
2.6 KiB
Python
69 lines
2.6 KiB
Python
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import pytest
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from tempfile import TemporaryDirectory
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from shutil import which
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from os.path import exists
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from re import match
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from PySide6.QtGui import QColor
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from LogarithmPlotter.util import latex
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latex.SHOW_GUI_MESSAGES = False
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@pytest.fixture()
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def latex_obj():
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directory = TemporaryDirectory()
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obj = latex.Latex(directory)
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if not obj.checkLatexInstallation():
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raise Exception("Cannot run LaTeX tests without a proper LaTeX installation. Make sure to install a LaTeX distribution, DVIPNG, and the calligra package, and run the tests again.")
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yield obj
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directory.cleanup()
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class TestLatex:
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def test_check_install(self, latex_obj: latex.Latex) -> None:
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assert latex_obj.latexSupported == True
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assert latex_obj.checkLatexInstallation() == True
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bkp = [latex.DVIPNG_PATH, latex.LATEX_PATH]
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# Check what happens when one is missing.
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latex.DVIPNG_PATH = None
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assert latex_obj.latexSupported == False
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assert latex_obj.checkLatexInstallation() == False
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latex.DVIPNG_PATH = bkp[0]
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latex.LATEX_PATH = None
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assert latex_obj.latexSupported == False
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assert latex_obj.checkLatexInstallation() == False
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# Reset
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[latex.DVIPNG_PATH, latex.LATEX_PATH] = bkp
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def test_render(self, latex_obj: latex.Latex) -> None:
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result = latex_obj.render(r"\frac{d\sqrt{\mathrm{f}(x \times 2.3)}}{dx}", 14, QColor(0, 0, 0, 255))
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# Ensure result format
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assert type(result) == str
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[path, width, height] = result.split(",")
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assert exists(path)
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assert match(r"\d+", width)
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assert match(r"\d+", height)
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# Ensure it returns errors on invalid latex.
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with pytest.raises(latex.RenderError):
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latex_obj.render(r"\nonexistant", 14, QColor(0, 0, 0, 255))
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# Replace latex bin with one that returns errors
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bkp = latex.LATEX_PATH
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latex.LATEX_PATH = which("false")
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with pytest.raises(latex.RenderError):
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latex_obj.render(r"\mathrm{f}(x)", 14, QColor(0, 0, 0, 255))
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latex.LATEX_PATH = bkp
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def test_prerendered(self, latex_obj: latex.Latex) -> None:
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args = [r"\frac{d\sqrt{\mathrm{f}(x \times 2.3)}}{dx}", 14, QColor(0, 0, 0, 255)]
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latex_obj.render(*args)
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prerendered = latex_obj.findPrerendered(*args)
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assert type(prerendered) == str
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[path, width, height] = prerendered.split(",")
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assert exists(path)
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assert match(r"\d+", width)
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assert match(r"\d+", height)
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prerendered2 = latex_obj.findPrerendered(args[0], args[1]+2, args[2])
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assert prerendered2 == ""
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