88 lines
2.8 KiB
Python
88 lines
2.8 KiB
Python
"""Unit tests for custom rendering of capa problem elements, including solutions and math expressions."""
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import unittest
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from xml.sax import saxutils
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from lxml import etree
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from xmodule.capa import customrender
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from xmodule.capa.tests.helpers import mock_capa_system
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# just a handy shortcut
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lookup_tag = customrender.registry.get_class_for_tag
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def extract_context(xml):
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"""
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Given an xml element corresponding to the output of test_capa_system.render_template, get back the
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original context
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"""
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return eval(xml.text) # pylint: disable=eval-used
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def quote_attr(s):
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"""Return a string safe for XML attributes without outer quotes."""
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return saxutils.quoteattr(s)[1:-1] # don't want the outer quotes
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class HelperTest(unittest.TestCase):
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"""
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Make sure that our helper function works!
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"""
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def check(self, d):
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"""Check that rendering and extracting context returns the original data."""
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xml = etree.XML(mock_capa_system().render_template("blah", d))
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assert d == extract_context(xml)
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def test_extract_context(self):
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"""Test that the context can be extracted correctly from rendered XML."""
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self.check({})
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self.check({1, 2})
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self.check({"id", "an id"})
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self.check({'with"quote', 'also"quote'})
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class SolutionRenderTest(unittest.TestCase):
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"""
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Make sure solutions render properly.
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"""
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def test_rendering(self):
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"""Ensure that <solution> elements are rendered correctly with proper IDs."""
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solution = "To compute unicorns, count them."
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xml_str = f"""<solution id="solution_12">{solution}</solution>"""
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element = etree.fromstring(xml_str)
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renderer = lookup_tag("solution")(mock_capa_system(), element)
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assert renderer.id == "solution_12"
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# Our test_capa_system "renders" templates to a div with the repr of the context.
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xml = renderer.get_html()
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context = extract_context(xml)
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assert context == {"id": "solution_12"}
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class MathRenderTest(unittest.TestCase):
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"""
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Make sure math renders properly.
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"""
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def check_parse(self, latex_in, mathjax_out):
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"""Check that LaTeX input is correctly converted to MathJax output."""
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xml_str = f"""<math>{latex_in}</math>"""
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element = etree.fromstring(xml_str)
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renderer = lookup_tag("math")(mock_capa_system(), element)
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assert renderer.mathstr == mathjax_out
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def test_parsing(self):
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"""Verify that LaTeX input is correctly converted to MathJax output."""
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self.check_parse("$abc$", "[mathjaxinline]abc[/mathjaxinline]")
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self.check_parse("$abc", "$abc")
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self.check_parse(r"$\displaystyle 2+2$", "[mathjax] 2+2[/mathjax]")
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# NOTE: not testing get_html yet because I don't understand why it's doing what it's doing.
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