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[Docutils-checkins] SF.net SVN: docutils:[9531] trunk/docutils
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From: <mi...@us...> - 2024-02-01 13:03:15
|
Revision: 9531
http://sourceforge.net/p/docutils/code/9531
Author: milde
Date: 2024-02-01 13:03:12 +0000 (Thu, 01 Feb 2024)
Log Message:
-----------
Unit tests for MathML elements.
Replace the comments with doctest-tests with a new test module.
Modified Paths:
--------------
trunk/docutils/docutils/utils/math/mathml_elements.py
Added Paths:
-----------
trunk/docutils/test/test_utils/test_math/test_mathml_elements.py
Modified: trunk/docutils/docutils/utils/math/mathml_elements.py
===================================================================
--- trunk/docutils/docutils/utils/math/mathml_elements.py 2024-02-01 13:03:02 UTC (rev 9530)
+++ trunk/docutils/docutils/utils/math/mathml_elements.py 2024-02-01 13:03:12 UTC (rev 9531)
@@ -114,9 +114,9 @@
args = ', '.join(f'{child}' for child in self)
return f'{self.__class__.__name__}({args})'
-# Emulate dictionary access methods for attributes
-# and list-like interface to the child elements
-# (differs from `docutils.nodes.Element` dict/list interface).
+ # Emulate dictionary access methods for attributes
+ # and list-like interface to the child elements
+ # (differs from `docutils.nodes.Element` dict/list interface).
def get(self, key, default=None):
return self.attrib.get(key, default)
@@ -128,9 +128,9 @@
return self.attrib.items()
def iter(self):
- """Return iterator over all subnodes, including nested ones."""
+ """Return iterator over self and all subnodes, including nested."""
+ yield self
for child in self.children:
- yield child
yield from child.iter()
def __len__(self):
@@ -139,9 +139,15 @@
def __getitem__(self, key):
return self.children.__getitem__(key)
- def __setitem__(self, key, element):
- element.parent = self
- self.children.__setitem__(key, element)
+ def __setitem__(self, key, value):
+ if self.nchildren == 0:
+ raise TypeError(f'Element "{self}" does not take children.')
+ if isinstance(value, MathElement):
+ value.parent = self
+ else: # value may be an iterable
+ for e in value:
+ e.parent = self
+ self.children.__setitem__(key, value)
def __delitem__(self, key):
self.children.__delitem__(key)
@@ -233,43 +239,11 @@
xml.extend(['\n', ' ' * level])
return xml
-# >>> n2 = math(mn(2))
-# >>> n2
-# math(mn('2'))
-# >>> n2.toprettyxml()
-# '<math>\n <mn>2</mn>\n</math>'
-# >>> len(n2)
-# 1
-# >>> n2.extend([mo('!')])
-# math(mn('2'), mo('!'))
-# >>> eq3 = math(id='eq3', display='block')
-# >>> eq3
-# math(id='eq3', display='block')
-# >>> eq3.toprettyxml()
-# '<math id="eq3" display="block"></math>'
-# >>> len(eq3)
-# 0
-# >>> math(CLASS='bold').xml_starttag()
-# '<math class="bold">'
-# >>> n2.in_block()
-# False
-# >>> node = n2.append(mrow())
-# >>> node.in_block()
-# False
-# >>> eq3.in_block()
-# True
-# >>> node = eq3.append(mrow())
-# >>> node.in_block()
-# True
-# >>> nested = math(math(math(CLASS='three'), CLASS='two'), CLASS='one')
-# >>> [node for node in nested.iter()]
-# [math(math(class='three'), class='two'), math(class='three')]
-
# Group sub-expressions in a horizontal row
#
# The elements <msqrt>, <mstyle>, <merror>, <mpadded>, <mphantom>,
-# <menclose>, <mtd>, <mscarry>, and <math> treat their contents
+# <menclose>, <mtd>, [...], and <math> treat their contents
# as a single inferred mrow formed from all their children.
# (https://www.w3.org/TR/mathml4/#presm_inferredmrow)
#
@@ -286,6 +260,7 @@
The special attribute `switch` indicates that the last two child
elements are in reversed order and must be switched before XML-export.
+ See `msub` for an example.
"""
nchildren = 2
@@ -301,18 +276,7 @@
self.switch = False
return current_node
-# >>> MathSchema(switch=True, display=True)
-# MathSchema(switch=True, display='true')
-# >>> MathSchema(MathElement(), switch=True)
-# MathSchema(MathElement(), switch=True)
-# >>> MathSchema(MathElement(id='c1'), MathElement(id='c2'), switch=True)
-# MathSchema(MathElement(id='c2'), MathElement(id='c1'))
-# >>> MathSchema(mrow(), mrow(), mrow()) # doctest: +ELLIPSIS
-# Traceback (most recent call last):
-# ...
-# TypeError: Element "MathSchema(...)" takes only 2 children.
-
# Token elements represent the smallest units of mathematical notation which
# carry meaning.
@@ -351,36 +315,30 @@
class mi(MathToken):
"""Identifier, such as a function name, variable or symbolic constant."""
-# >>> mi(mtext('out'))
-# Traceback (most recent call last):
-# ...
-# ValueError: MathToken element expects `str` or number, not "mtext('out')".
-
class mn(MathToken):
"""Numeric literal.
+ >>> mn(3.41).toprettyxml()
+ '<mn>3.41</mn>'
+
Normally a sequence of digits with a possible separator (a dot or a comma).
+ (Values with comma must be specified as `str`.)
"""
-# >>> mn(3.41)
-# mn('3.41')
-
class mo(MathToken):
"""Operator, Fence, Separator, or Accent.
+ >>> mo('<').toprettyxml()
+ '<mo><</mo>'
+
Besides operators in strict mathematical meaning, this element also
includes "operators" like parentheses, separators like comma and
semicolon, or "absolute value" bars.
"""
-# >>> mo('<')
-# mo('<')
-# >>> mo('<').toprettyxml()
-# '<mo><</mo>'
-
class mspace(MathElement):
"""Blank space, whose size is set by its attributes.
@@ -391,14 +349,7 @@
"""
nchildren = 0
-# >>> mspace(width='2em').toprettyxml()
-# '<mspace width="2em"></mspace>'
-# >>> mspace(mn(3))
-# Traceback (most recent call last):
-# ...
-# TypeError: Element "mspace()" does not take children.
-
# General Layout Schemata
# ~~~~~~~~~~~~~~~~~~~~~~~
@@ -438,24 +389,7 @@
self.transfer_attributes(child)
return super().close()
-# Examples:
-#
-# >>> e = mrow(mn('3.5'), mo('<'), mi('x'))
-# >>> e
-# mrow(mn('3.5'), mo('<'), mi('x'))
-# >>> e.toprettyxml()
-# '<mrow>\n <mn>3.5</mn>\n <mo><</mo>\n <mi>x</mi>\n</mrow>'
-# >>> mo('∫', movablelimits=True).toprettyxml()
-# '<mo movablelimits="true">∫</mo>'
-# >>> mtext('comments or annotations').text
-# 'comments or annotations'
-# >>> row = mrow(mi('i', CLASS='boldmath'), mathvariant='normal', CLASS='test')
-# >>> tree = math(row)
-# >>> row.close()
-# math(mi('i', class='boldmath test', mathvariant='normal'))
-
-
class mfrac(MathSchema):
"""Fractions or fraction-like objects such as binomial coefficients."""
@@ -473,8 +407,8 @@
"""Style Change.
In modern browsers, <mstyle> is equivalent to an <mrow> element.
- However, <mstyle> may still be relevant for compatibility with MathML
- implementations outside browsers.
+ However, <mstyle> may still be relevant for compatibility with
+ MathML implementations outside browsers.
"""
@@ -538,21 +472,6 @@
"""Attach accents or limits both under and over an expression."""
-# >>> munder(mi('lim'), mo('-'), accent='false')
-# munder(mi('lim'), mo('-'), accent='false')
-# >>> mu = munder(mo('-'), accent='false', switch=True)
-# >>> mu
-# munder(mo('-'), switch=True, accent='false')
-# >>> mu.append(mi('lim'))
-# >>> mu
-# munder(mi('lim'), mo('-'), accent='false')
-# >>> mu.append(mi('lim'))
-# Traceback (most recent call last):
-# TypeError: Element "munder(mi('lim'), mo('-'))" takes only 2 children.
-# >>> munder(mo('-'), mi('lim'), accent='false', switch=True).toprettyxml()
-# '<munder accent="false">\n <mi>lim</mi>\n <mo>-</mo>\n</munder>'
-
-
# Tabular Math
# ~~~~~~~~~~~~
@@ -566,7 +485,3 @@
class mtd(MathRow):
"""Cell in a table or a matrix"""
-
-# >>> t = mtable(displaystyle=True)
-# >>> math(t).toprettyxml()
-# '<math>\n <mtable displaystyle="true"></mtable>\n</math>'
Added: trunk/docutils/test/test_utils/test_math/test_mathml_elements.py
===================================================================
--- trunk/docutils/test/test_utils/test_math/test_mathml_elements.py (rev 0)
+++ trunk/docutils/test/test_utils/test_math/test_mathml_elements.py 2024-02-01 13:03:12 UTC (rev 9531)
@@ -0,0 +1,375 @@
+#! /usr/bin/env python3
+# :Copyright: © 2024 Günter Milde.
+# :License: Released under the terms of the `2-Clause BSD license`_, in short:
+#
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.
+# This file is offered as-is, without any warranty.
+#
+# .. _2-Clause BSD license: https://opensource.org/licenses/BSD-2-Clause
+
+
+"""
+Test module for utils/__init__.py.
+"""
+
+from pathlib import Path
+import sys
+import unittest
+
+if __name__ == '__main__':
+ # prepend the "docutils root" to the Python library path
+ # so we import the local `docutils` package.
+ sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+import docutils.utils.math.mathml_elements as mml
+
+TEST_ROOT = Path(__file__).parent # ./test/ from the docutils root
+
+# The index of MathML elements
+# on https://developer.mozilla.org/en-US/docs/Web/MathML/Element
+# Element Nr. of children Description comment
+mathml_elements = """
+ <maction> * Bound actions to sub-expressions DEPRECATED
+ <annotation> 0 Data annotations NOT IMPLEMENTED
+ <annotation-xml> * XML annotations NOT IMPLEMENTED
+ <math> * Top-level element
+ <menclose> 1 Enclosed contents (non-standard)
+ <merror> * Enclosed syntax error messages
+ <mfenced> * Parentheses (non-standard) DEPRECATED
+ <mfrac> 2 Fraction
+ <mi> 0 Identifier
+ <mmultiscripts> * Prescripts and tensor indices NOT IMPLEMENTED
+ <mn> 0 Number
+ <mo> 0 Operator (and similar)
+ <mover> 2 Overscript
+ <mpadded> * Extra padding NOT IMPLEMENTED
+ <mphantom> 1 Invisible content reserving space
+ <mroot> 2 Radical with specified index
+ <mrow> * Grouped sub-expressions
+ <ms> 0 String literal NOT IMPLEMENTED
+ <mspace> 0 Space
+ <msqrt> 1 Square root without an index
+ <mstyle> * Style change (for compatibility)
+ <msub> 2 Subscript
+ <msup> 2 Superscrip
+ <msubsup> 3 Subscript-superscript pair
+ <mtable> * Table or matrix
+ <mtd> * Cell in a table or a matrix
+ <mtext> 0 Text
+ <mtr> * Row in a table or a matrix
+ <munder> 2 Underscript
+ <munderover> 3 Underscript-overscript pair
+ <semantics> * annotations (e.g. text source) NOT IMPLEMENTED
+ """
+
+
+class MathElementTests(unittest.TestCase):
+ """Test the <MathElement> base class."""
+
+ prettyXML = """\
+<math id="root">
+ <math id="c1"></math>
+ <math id="c2">
+ <math id="cc1"></math>
+ </math>
+</math>"""
+
+ def test__init__(self):
+ """Instantiate a MathElement object and test its properties."""
+
+ # No arguments required, the class name is used as XML tag:
+ e1 = mml.MathElement()
+
+ # Positional arguments are stored as children,
+ # named arguments are stored as element attributes:
+ # * argument names are downcased,
+ # * attribute values must be `str`, `boolean`, or numerical
+ # and are stored as `str` (cf. test_a_str() below).
+ e0 = mml.MathElement(e1, CLASS='root', scriptlevel=1)
+ # len() returns the number of children
+ self.assertEqual(len(e0), 1)
+ # Attributes can be accessed using get(), set(), items(), and keys().
+ self.assertEqual(e0.get('class'), 'root')
+ e0.set('scriptlevel', 2)
+ e0.set('displaystyle', True)
+ self.assertEqual(e0.attrib, {'class': 'root',
+ 'scriptlevel': '2',
+ 'displaystyle': 'true'})
+
+ def test_children(self):
+ # positional arguments are stored as children.
+ e4 = mml.MathElement(id='e4')
+ e3 = mml.MathElement(id='e3')
+ e2 = mml.MathElement(e3, e4, id='e2')
+ e1 = mml.MathElement(id='e1')
+ e0 = mml.MathElement(e1, e2, id='e0')
+ # xml.etree uses list syntax to access them
+ self.assertEqual(e0[0], e1)
+ self.assertEqual(e0[1][-1], e4)
+ self.assertEqual(e0[:], [e1, e2]) # list of e0's children
+ # The default iterator yields the immediate children
+ self.assertEqual(tuple(e0), (e1, e2))
+ # The `iter()` method returns `self` and all descendants
+ self.assertEqual(tuple(e0.iter()), (e0, e1, e2, e3, e4))
+
+ # more list-like functions are tested below...
+
+ def test_a_str(self):
+ # test the XML attribute normalisation
+ #
+ # Values are converted to `str`:
+ self.assertEqual(mml.MathElement.a_str(-2), '-2')
+ self.assertEqual(mml.MathElement.a_str(1), '1')
+ self.assertEqual(mml.MathElement.a_str(0), '0')
+ # Booleans are downcased:
+ self.assertEqual(mml.MathElement.a_str(True), 'true')
+ self.assertEqual(mml.MathElement.a_str(False), 'false')
+ # Strings are left as-is:
+ self.assertEqual(mml.MathElement.a_str('+1'), '+1')
+ self.assertEqual(mml.MathElement.a_str('True'), 'True')
+ self.assertEqual(mml.MathElement.a_str(''), '')
+
+ def test__repr__(self):
+ """The representation should match the code to instantiate."""
+ # Watch the idempotent normalisation:
+ # * attribute names are downcased,
+ # * XML attribute values are converted to strings
+ e1 = mml.MathElement(mml.MathElement(level=2), CLASS='root')
+ self.assertEqual(repr(e1),
+ "MathElement(MathElement(level='2'), class='root')")
+ # Also report non-default number of children: (as `int`, not `str`)
+ e1[0].nchildren = 1
+ self.assertEqual(repr(e1[0]), "MathElement(nchildren=1, level='2')")
+
+ def test__str__(self):
+ """Informal string representation for debugging and error reports."""
+ e1 = mml.MathElement(mml.MathElement(level=2), CLASS='root')
+ self.assertEqual(str(e1), 'MathElement(MathElement())')
+
+ def test__setitem__(self):
+ """Setting an item also sets the `parent` attribute on the child."""
+ e1 = mml.MathElement()
+ e1[:] = (mml.MathElement(id=1), mml.MathElement(id=2))
+ self.assertEqual(e1[0].parent, e1)
+ self.assertEqual(e1[0].get('id'), '1')
+ self.assertEqual(e1[1].get('id'), '2')
+ e1[0] = mml.MathElement()
+ self.assertEqual(e1[0].get('id'), None)
+ self.assertEqual(e1[0].parent, e1)
+
+ def test_is_full(self):
+ # A node is "full", if the number of children equals or exceeds
+ # the number of accepted children given in the "nchildren" attribute.
+ e1 = mml.MathElement()
+ self.assertTrue(e1.nchildren is None) # no limit to number of children
+ self.assertFalse(e1.is_full())
+ e1.nchildren = 1 # element expects/accepts one child.
+ self.assertFalse(e1.is_full())
+ e1.nchildren = 0 # element expects/accepts no children.
+ self.assertTrue(e1.is_full())
+
+ def test_close(self):
+ """Closing an element returns first non-closed anchestor or None."""
+ e1 = mml.MathElement(mml.MathElement())
+ self.assertEqual(e1[0].close(), e1)
+ self.assertTrue(e1.close() is None)
+ # When all anchestors are closed, return None as well
+ self.assertTrue(e1[0].close() is None)
+
+ def test_append(self):
+ """Test special features of the "append()" method."""
+ e1 = mml.MathElement()
+ e1.nchildren = 2 # element expects/accepts two children.
+
+ # Appending to an element sets the internal "parent" attribute ...
+ result = e1.append(mml.MathElement(id='c1'))
+ self.assertEqual(e1[0].parent, e1)
+ # ... which is hidden in XML ...
+ self.assertEqual(e1[0].toprettyxml(),
+ '<MathElement id="c1"></MathElement>')
+ # ... and returns the new "insertion point".
+ # If more children may be appended, return self
+ self.assertEqual(result, e1)
+ # If the element is "full" after appending the child,
+ # a non-full anchestor or None is returned:
+ result = e1.append(mml.MathElement(id='c2'))
+ self.assertTrue(result is None)
+
+ # Trying to append to an element that is "full" returns an error:
+ with self.assertRaises(TypeError) as cm:
+ result = e1.append(mml.MathElement())
+ self.assertEqual(str(cm.exception),
+ 'Element "MathElement(MathElement(), MathElement())"'
+ ' takes only 2 children.')
+
+ def test_extend(self):
+ e1 = mml.MathElement()
+ c1 = mml.MathElement(id='c1')
+ c2 = mml.MathElement(id='c2')
+ e1.extend([c1, c2])
+ self.assertEqual([*e1], [c1, c2])
+
+ def test_pop(self):
+ c1 = mml.MathElement(id='c1')
+ c2 = mml.MathElement(id='c2')
+ e1 = mml.MathElement(c1, c2)
+ last_element = e1.pop()
+ self.assertEqual(last_element, c2)
+ self.assertEqual([*e1], [c1])
+ first_element = e1.pop(0)
+ self.assertEqual(first_element, c1)
+ with self.assertRaises(IndexError):
+ e1.pop()
+
+ def test_in_block(self):
+ # Return True, if `self` or an anchestor is a block-level element:
+ e1 = mml.math(display='block')
+ e2 = mml.math(mml.math(id='e3'), id='e2')
+ self.assertTrue(e1.in_block())
+ self.assertFalse(e2.in_block())
+ self.assertFalse(e2[0].in_block())
+ e1.append(e2)
+ self.assertTrue(e2.in_block())
+ self.assertTrue(e2[0].in_block())
+
+ def test_toprettyxml(self):
+ """XML representation of the element/subtree as `str`."""
+ e1 = mml.math(mml.math(level=2), CLASS='root')
+ self.assertEqual(e1.toprettyxml(),
+ '<math class="root">\n'
+ ' <math level="2"></math>\n'
+ '</math>')
+
+
+class MathSchemaTests(unittest.TestCase):
+ """Test `MathSchema` and derived element classes."""
+
+ def test__init__(self):
+ # the optional `switch` argument is stored as internal attribute
+ ms1 = mml.MathSchema(switch=True, id='ms1')
+ self.assertEqual(repr(ms1), "MathSchema(switch=True, id='ms1')")
+ # internal attributes are not exported to XML.
+ self.assertEqual(ms1.toprettyxml(),
+ '<MathSchema id="ms1"></MathSchema>')
+ # the default value is dropped from ``repr()``
+ ms1.switch = False
+ self.assertEqual(repr(ms1), "MathSchema(id='ms1')")
+
+ def test__init__full(self):
+ # when initialized with `nchildren` children and `switch` True,
+ # the children are switched and `switch` is reset:
+ ms2 = mml.MathSchema(mml.mn(1), mml.mn(2), switch=True)
+ self.assertEqual(repr(ms2), "MathSchema(mn('2'), mn('1'))")
+ self.assertEqual(
+ ms2.toprettyxml(),
+ '<MathSchema>\n <mn>2</mn>\n <mn>1</mn>\n</MathSchema>')
+
+ def test_append(self):
+ # appending normalizes the order before switching
+ ms1 = mml.MathSchema(mml.mn(1), switch=True)
+ ms1.append(mml.mn(2))
+ self.assertEqual(repr(ms1), "MathSchema(mn('2'), mn('1'))")
+ # appending to a closed element raises TypeError
+ with self.assertRaises(TypeError) as cm:
+ ms1.append(mml.mn(3))
+ self.assertIn('takes only 2 children', str(cm.exception))
+
+
+class MathTokenTests(unittest.TestCase):
+ """Test MathToken and derived element classes."""
+
+ def test__init__(self):
+ # requires one argument `text` that is stored as the element's text
+ self.assertEqual(repr(mml.mi('x')), "mi('x')")
+ # the argument is converted to a `str`
+ self.assertEqual(repr(mml.mn(42)), "mn('42')")
+ # only one positional argument allowed:
+ with self.assertRaises(TypeError):
+ mml.mo('[', 'stretchy')
+ # text must be `str` or numerical value:
+ with self.assertRaises(ValueError) as cm:
+ mml.mi(mml.mtext('out'))
+ self.assertIn('MathToken element expects `str` or number',
+ str(cm.exception))
+
+ # optional named arguments become XML attributes
+ e1 = mml.mo('[', stretchy=False)
+ self.assertEqual(e1.toprettyxml(), '<mo stretchy="false">[</mo>')
+
+ def test_append(self):
+ # MathTokens don't take child elements.
+ # Appending to MathTokens raises an exception.
+ e1 = mml.mo('[')
+ self.assertEqual(e1.nchildren, 0)
+ with self.assertRaises(TypeError) as cm:
+ e1.append(mml.mi('x'))
+ self.assertEqual(str(cm.exception),
+ 'Element "mo(\'[\')" does not take children.')
+ with self.assertRaises(TypeError) as cm:
+ e1[:] = [mml.mn(3)]
+ self.assertEqual(str(cm.exception),
+ 'Element "mo(\'[\')" does not take children.')
+
+
+class mrowTests(unittest.TestCase):
+ """Test the `mrow` element class."""
+
+ def test_transfer_attributes(self):
+ e1 = mml.mrow(level=1, CLASS='cls1', style='rule1')
+ e2 = mml.mrow(level=2, CLASS='cls2')
+ e3 = mml.mrow(level=3, style='rule3')
+ # e1.attrib -> e2.attrib
+ e1.transfer_attributes(e2)
+ self.assertEqual(e2.get('level'), '1')
+ self.assertEqual(e2.get('class'), 'cls2 cls1')
+ self.assertEqual(e2.get('style'), 'rule1')
+ # e3.attrib -> e1.attrib
+ e3.transfer_attributes(e1)
+ self.assertEqual(e1.get('level'), '3')
+ self.assertEqual(e1.get('class'), 'cls1')
+ self.assertEqual(e1.get('style'), 'rule1; rule3')
+
+ def test_close_only_child(self):
+ # Remove <mrow> if it has a parent and only one child element.
+ # NOTE: this feature may be removed.
+ c1 = mml.math(CLASS='c1')
+ row1 = mml.mrow(c1, CLASS='row1')
+ # if possible, attach child to parent
+ row1.close() # no parent, no removal
+ self.assertEqual(c1.parent, row1)
+
+ root = mml.math(row1) # provide a parent
+ row1.close() # try again
+ self.assertEqual(c1.parent, root)
+ self.assertEqual(root.toprettyxml(),
+ '<math>\n <math class="c1 row1"></math>\n</math>')
+
+
+class MathMLElementTests(unittest.TestCase):
+ """Test classes for "MathML Core" elements."""
+
+ def test_mathml_elements(self):
+ for line in mathml_elements.strip().splitlines():
+ element, nchildren, description = line.split(maxsplit=2)
+ element = element.strip('<>')
+ if 'DEPRECATED' in description or 'NOT IMPLEMENTED' in description:
+ continue
+ cls = getattr(mml, element)
+ if issubclass(cls, mml.MathToken):
+ e = cls('x')
+ self.assertEqual(e.toprettyxml(), f'<{element}>x</{element}>')
+ else:
+ e = cls()
+ self.assertEqual(e.toprettyxml(), f'<{element}></{element}>')
+ if nchildren == '*':
+ self.assertTrue(e.nchildren is None,
+ f'{element}.nchildren == {e.nchildren}')
+ else:
+ self.assertEqual(e.nchildren, int(nchildren),
+ f'{element}.nchildren == {e.nchildren}')
+
+
+if __name__ == '__main__':
+ unittest.main()
Property changes on: trunk/docutils/test/test_utils/test_math/test_mathml_elements.py
___________________________________________________________________
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