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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Tests for L{twisted.lore.lmath}.
"""
from xml.dom.minidom import Element, Text
from twisted.trial.unittest import TestCase
from twisted.python.filepath import FilePath
from twisted.lore.scripts.lore import IProcessor
from twisted.plugin import getPlugins
from twisted.lore.lmath import formulaeToImages
class PluginTests(TestCase):
"""
Tests for the plugin which lets L{twisted.lore.lmath} be used from the lore
command line tool.
"""
def test_discoverable(self):
"""
The plugin for L{twisted.lore.lmath} can be discovered by querying for
L{IProcessor} plugins.
"""
plugins = getPlugins(IProcessor)
lmath = [p for p in plugins if p.name == "mlore"]
self.assertEqual(len(lmath), 1, "Did not find math lore plugin: %r" % (lmath,))
class FormulaeTests(TestCase):
"""
Tests for L{formulaeToImages}.
"""
def test_insertImages(self):
"""
L{formulaeToImages} replaces any elements with the I{latexformula}
class with I{img} elements which refer to external images generated
based on the latex in the original elements.
"""
parent = Element('div')
base = FilePath(self.mktemp())
base.makedirs()
macros = Element('span')
macros.setAttribute('class', 'latexmacros')
text = Text()
text.data = 'foo'
macros.appendChild(text)
parent.appendChild(macros)
formula = Element('span')
formula.setAttribute('class', 'latexformula')
text = Text()
text.data = 'bar'
formula.appendChild(text)
parent.appendChild(formula)
# Avoid actually executing the commands to generate images from the
# latex. It might be nice to have some assertions about what commands
# are executed, or perhaps even execute them and make sure an image
# file is created, but that is a task for another day.
commands = []
formulaeToImages(parent, base.path, _system=commands.append)
self.assertEqual(
parent.toxml(),
'<div><span><br/><img src="latexformula0.png"/><br/></span></div>')
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