def test_presentation_mathml_order():
expr = x**3 + x**2*y + 3*x*y**3 + y**4
mp = MathMLPresentationPrinter({'order': 'lex'})
mml = mp._print(expr)
assert mml.childNodes[0].nodeName == 'msup'
assert mml.childNodes[0].childNodes[0].childNodes[0].nodeValue == 'x'
assert mml.childNodes[0].childNodes[1].childNodes[0].nodeValue == '3'
assert mml.childNodes[6].nodeName == 'msup'
assert mml.childNodes[6].childNodes[0].childNodes[0].nodeValue == 'y'
assert mml.childNodes[6].childNodes[1].childNodes[0].nodeValue == '4'
mp = MathMLPresentationPrinter({'order': 'rev-lex'})
mml = mp._print(expr)
assert mml.childNodes[0].nodeName == 'msup'
assert mml.childNodes[0].childNodes[0].childNodes[0].nodeValue == 'y'
assert mml.childNodes[0].childNodes[1].childNodes[0].nodeValue == '4'
assert mml.childNodes[6].nodeName == 'msup'
assert mml.childNodes[6].childNodes[0].childNodes[0].nodeValue == 'x'
assert mml.childNodes[6].childNodes[1].childNodes[0].nodeValue == '3'
def test_presentation_mathml_order():
expr = x**3 + x**2 * y + 3 * x * y**3 + y**4
mp = MathMLPresentationPrinter({'order': 'lex'})
mml = mp._print(expr)
assert mml.childNodes[0].nodeName == 'msup'
assert mml.childNodes[0].childNodes[0].childNodes[0].nodeValue == 'x'
assert mml.childNodes[0].childNodes[1].childNodes[0].nodeValue == '3'
assert mml.childNodes[6].nodeName == 'msup'
assert mml.childNodes[6].childNodes[0].childNodes[0].nodeValue == 'y'
assert mml.childNodes[6].childNodes[1].childNodes[0].nodeValue == '4'
mp = MathMLPresentationPrinter({'order': 'rev-lex'})
mml = mp._print(expr)
assert mml.childNodes[0].nodeName == 'msup'
assert mml.childNodes[0].childNodes[0].childNodes[0].nodeValue == 'y'
assert mml.childNodes[0].childNodes[1].childNodes[0].nodeValue == '4'
assert mml.childNodes[6].nodeName == 'msup'
assert mml.childNodes[6].childNodes[0].childNodes[0].nodeValue == 'x'
assert mml.childNodes[6].childNodes[1].childNodes[0].nodeValue == '3'
def _expression_to_mathml(expr: Any,
printer: str = "content",
**settings: Any) -> str:
"""Convert sympy expression to MathML.
:param expr: sympy expression
:param printer: 'content' or 'presentation'
:param settings:
:return: Content or presentation MathML
"""
if printer == "presentation":
s = MathMLPresentationPrinter(settings)
else:
s = MathMLContentPrinter(settings)
xml = s._print(sympify(expr))
s.apply_patch()
pretty_xml = xml.toprettyxml()
s.restore_patch()
return str(pretty_xml)