Igor20264
63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
"""The mml2omml stylesheet is now compiled once and shared between formulas.
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These tests pin the two properties that makes safe: the output must match a
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freshly compiled transform, and reusing the compiled object must not let one
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formula affect the next.
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"""
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import os
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import unittest
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import latex2mathml.converter
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from lxml import etree
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from md2gost import package_dir
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from md2gost.latex_math import latex_to_omml
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_FORMULAS = [
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"x^2 + y^2 = z^2",
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r"\frac{a}{b}",
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r"\frac{a + b}{c + d}",
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r"\sum_{i=1}^{n} i",
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r"\sqrt{x+1}",
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r"\int_0^1 f(x)dx",
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r"\alpha \beta \gamma",
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r"E = mc^2",
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]
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def _freshly_compiled(latex_equation: str) -> bytes:
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"""Pre-optimization behaviour: parse and compile the stylesheet per call."""
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mathml = latex2mathml.converter.convert(latex_equation)
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tree = etree.fromstring(mathml)
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transform = etree.XSLT(etree.parse(os.path.join(package_dir(), "mml2omml")))
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return etree.tostring(transform(tree).getroot())
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class TestLatexToOmml(unittest.TestCase):
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def test_matches_freshly_compiled_transform(self):
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for formula in _FORMULAS:
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with self.subTest(formula=formula):
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self.assertEqual(_freshly_compiled(formula),
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etree.tostring(latex_to_omml(formula)))
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def test_repeated_calls_are_identical(self):
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for formula in _FORMULAS:
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with self.subTest(formula=formula):
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outputs = {etree.tostring(latex_to_omml(formula)) for _ in range(5)}
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self.assertEqual(1, len(outputs))
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def test_interleaved_formulas_do_not_interfere(self):
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expected = {f: etree.tostring(latex_to_omml(f)) for f in _FORMULAS}
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for _ in range(3):
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for formula in reversed(_FORMULAS):
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self.assertEqual(expected[formula], etree.tostring(latex_to_omml(formula)))
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def test_invalid_formula_still_raises_value_error(self):
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with self.assertRaises(ValueError):
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latex_to_omml(r"\frac{")
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if __name__ == "__main__":
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unittest.main()
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