80 lines
2.3 KiB
Python
80 lines
2.3 KiB
Python
"""Helpers for writing unit tests."""
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from __future__ import print_function, division, absolute_import
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from fontTools.misc.py23 import *
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from fontTools.misc.xmlWriter import XMLWriter
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def parseXML(xmlSnippet):
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"""Parses a snippet of XML.
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The result is in the same format that would be returned by
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XMLReader, but the parser imposes no constraints on the root
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element so it can be called on small snippets of TTX files.
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"""
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# To support snippets with multiple elements, we add a fake root.
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reader = TestXMLReader_()
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reader.parser.Parse("<root>%s</root>" % xmlSnippet, 0)
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return reader.root[2]
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class FakeFont:
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def __init__(self, glyphs):
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self.glyphOrder_ = glyphs
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def getGlyphID(self, name):
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return self.glyphOrder_.index(name)
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def getGlyphName(self, glyphID):
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if glyphID < len(self.glyphOrder_):
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return self.glyphOrder_[glyphID]
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else:
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return "glyph%.5d" % glyphID
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def getGlyphOrder(self):
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return self.glyphOrder_
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class TestXMLReader_(object):
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def __init__(self):
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from xml.parsers.expat import ParserCreate
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self.parser = ParserCreate()
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self.parser.StartElementHandler = self.startElement_
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self.parser.EndElementHandler = self.endElement_
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self.parser.CharacterDataHandler = self.addCharacterData_
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self.root = None
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self.stack = []
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def startElement_(self, name, attrs):
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element = (name, attrs, [])
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if self.stack:
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self.stack[-1][2].append(element)
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else:
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self.root = element
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self.stack.append(element)
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def endElement_(self, name):
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self.stack.pop()
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def addCharacterData_(self, data):
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self.stack[-1][2].append(data)
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def makeXMLWriter():
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# don't write OS-specific new lines
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writer = XMLWriter(BytesIO(), newlinestr='')
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# erase XML declaration
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writer.file.seek(0)
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writer.file.truncate()
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return writer
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def getXML(func, ttFont=None):
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"""Call the passed toXML function and return the written content as string.
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Result is stripped of XML declaration and OS-specific newline characters.
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"""
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writer = makeXMLWriter()
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func(writer, ttFont)
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xml = writer.file.getvalue().decode("utf-8")
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return xml
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