getting back into it... day 3

Today I decided I needed a debugger... since I'm not really up on the syntax of python (lists look like tuples look like arrays to me)... I was really lost... it took about an hour to digging around to decide on PyScripter to be my IDE. I don't want to get tied into a product I can't afford, so I took a pass on Komodo from ActiveState.

I've managed to finally deduce what I was doing wrong, and pass one of my trivial unit tests... the code now looks like this:

--Translate01.py

"""Translates internal representation to and from xhtml"""

#define Exceptions

class HtmlError(Exception): pass
class invalidHtmlError(HtmlError): pass

#Define escape mapping
htmlCharMap = [('>', ">"),
               ('<', "<")]


def toHtml(x):
    """convert x to html string"""
    return x

def fromHtml(s):
    """convert html string to internal representation"""

    result = ''
    index = 0
    while index < len(s):
        foundat = -1
        i = 0
        for ascii,html in htmlCharMap:
            if (foundat < 0) & (s[index:index+len(html)] == html):
                foundat = i
            i += 1
        if foundat >= 0:
            ascii, html = htmlCharMap[foundat]
            result += ascii
            index += len(html)
        else:
             result += s[index]
             index += 1
    return result

Translate01_test.py:

"""Unit test for translate01.py"""

import translate01
import unittest

class KnownValues(unittest.TestCase):
    knownValues = ( ( '', ''),
                    ( 'x','x'),
                    ( '>','>'),
                    ( '<','<'),
                    ( 'this is a test','this is a test') )

    def testToHtmlKnownValues(self):
        """ToHtml should give known results with known input"""
        for s1,s2 in self.knownValues:
            result = translate01.toHtml(s1)
            self.assertEqual(s2,result)

    def testFromHtmlKnownValues(self):
        """FromHtml should give known results with known input"""
        for s1,s2 in self.knownValues:
            result = translate01.fromHtml(s2)
            self.assertEqual(s1,result)


if __name__ == "__main__":
    unittest.main()