How to use get_line_changed_regions method in Testify

Best Python code snippet using Testify_python

utils.py

Source:utils.py

...9LEFT_HIGHLIGHT_CHARACTER = '<'10RIGHT_HIGHLIGHT_CHARACTER = '>'11# Borrowed from12# https://github.com/reviewboard/reviewboard/blob/master/reviewboard/diffviewer/diffutils.py13def get_line_changed_regions(oldline, newline):14    if oldline is None or newline is None:15        return (None, None)16    # Use the SequenceMatcher directly. It seems to give us better results17    # for this. We should investigate steps to move to the new differ.18    differ = SequenceMatcher(None, oldline, newline)19    # This thresholds our results -- we don't want to show inter-line diffs if20    # most of the line has changed, unless those lines are very short.21    # FIXME: just a plain, linear threshold is pretty crummy here.  Short22    # changes in a short line get lost.  I haven't yet thought of a fancy23    # nonlinear test.24    if differ.ratio() < 0.6:25        return (None, None)26    oldchanges = []27    newchanges = []28    back = (0, 0)29    for tag, i1, i2, j1, j2 in differ.get_opcodes():30        if tag == "equal":31            if (i2 - i1 < 3) or (j2 - j1 < 3):32                back = (j2 - j1, i2 - i1)33            continue34        oldstart, oldend = i1 - back[0], i235        newstart, newend = j1 - back[1], j236        if oldchanges != [] and oldstart <= oldchanges[-1][1] < oldend:37            oldchanges[-1] = (oldchanges[-1][0], oldend)38        elif not oldline[oldstart:oldend].isspace():39            oldchanges.append((oldstart, oldend))40        if newchanges != [] and newstart <= newchanges[-1][1] < newend:41            newchanges[-1] = (newchanges[-1][0], newend)42        elif not newline[newstart:newend].isspace():43            newchanges.append((newstart, newend))44        back = (0, 0)45    return (oldchanges, newchanges)46def highlight_regions(string, regions):47    """Given `string` and `regions` (a list of (beginning index, end index)48    tuples), return `string` marked up to highlight those regions.49    >>> highlight_regions('This is a string.', [(0, 3), (8, 9)])50    '<Thi>s is <a> string.'51    """52    string = list(string)53    # Inserting into the middle of a list shifts all the elements over by one.54    # Each time a markup element is added, increase a result string's insertion55    # offset.56    offset = 057    for beginning, end in sorted(regions or []):58        string.insert(offset + beginning, LEFT_HIGHLIGHT_CHARACTER)59        offset +=160        string.insert(offset + end, RIGHT_HIGHLIGHT_CHARACTER)61        offset +=162    return ''.join(string)63# no namedtuple in Python 2.5; here is a simple imitation64# HighlightedDiff = collections.namedtuple('HighlightedDiff', 'old new')65class HighlightedDiff(tuple):66    def __new__(cls, old, new):67        return tuple.__new__(cls, (old, new))68    __slots__ = ()  # no attributes allowed69    @property70    def old(self):71        return self[0]72    @property73    def new(self):74        return self[1]75    def __repr__(self):76        return '%s(%r, %r)' % (self.__class__.__name__, self.old, self.new)77def highlight(old, new):78    """Given two strings, return a `HighlightedDiff` containing the strings79    with markup identifying the parts that changed.80    >>> highlight('Testify is great.', 'testify is gr8')81    HighlightedDiff(old='<T>estify is gr<eat.>', new='<t>estify is gr<8>')82    """83    oldchanges, newchanges = get_line_changed_regions(old, new)84    return HighlightedDiff(highlight_regions(old, oldchanges),...

stringdiffer.py

Source:stringdiffer.py

...6LEFT_HIGHLIGHT_CHARACTER = '<'7RIGHT_HIGHLIGHT_CHARACTER = '>'8# Borrowed from9# https://github.com/reviewboard/reviewboard/blob/master/reviewboard/diffviewer/diffutils.py10def get_line_changed_regions(oldline, newline):11    if oldline is None or newline is None:12        return (None, None)13    # Use the SequenceMatcher directly. It seems to give us better results14    # for this. We should investigate steps to move to the new differ.15    differ = SequenceMatcher(None, oldline, newline)16    # This thresholds our results -- we don't want to show inter-line diffs if17    # most of the line has changed, unless those lines are very short.18    # FIXME: just a plain, linear threshold is pretty crummy here.  Short19    # changes in a short line get lost.  I haven't yet thought of a fancy20    # nonlinear test.21    if differ.ratio() < 0.6:22        return (None, None)23    oldchanges = []24    newchanges = []25    back = (0, 0)26    for tag, i1, i2, j1, j2 in differ.get_opcodes():27        if tag == "equal":28            if ((i2 - i1 < 3) or (j2 - j1 < 3)) and (i1, j1) != (0, 0):29                back = (j2 - j1, i2 - i1)30            continue31        oldstart, oldend = i1 - back[0], i232        newstart, newend = j1 - back[1], j233        if oldchanges != [] and oldstart <= oldchanges[-1][1] < oldend:34            oldchanges[-1] = (oldchanges[-1][0], oldend)35        elif not oldline[oldstart:oldend].isspace():36            oldchanges.append((oldstart, oldend))37        if newchanges != [] and newstart <= newchanges[-1][1] < newend:38            newchanges[-1] = (newchanges[-1][0], newend)39        elif not newline[newstart:newend].isspace():40            newchanges.append((newstart, newend))41        back = (0, 0)42    return (oldchanges, newchanges)43def highlight_regions(string, regions):44    """Given `string` and `regions` (a list of (beginning index, end index)45    tuples), return `string` marked up to highlight those regions.46    >>> highlight_regions('This is a string.', [(0, 3), (8, 9)])47    '<Thi>s is <a> string.'48    """49    string = list(string)50    # Inserting into the middle of a list shifts all the elements over by one.51    # Each time a markup element is added, increase a result string's insertion52    # offset.53    offset = 054    for beginning, end in sorted(regions or []):55        string.insert(offset + beginning, LEFT_HIGHLIGHT_CHARACTER)56        offset += 157        string.insert(offset + end, RIGHT_HIGHLIGHT_CHARACTER)58        offset += 159    return ''.join(string)60# no namedtuple in Python 2.5; here is a simple imitation61# HighlightedDiff = collections.namedtuple('HighlightedDiff', 'old new')62class HighlightedDiff(tuple):63    def __new__(cls, old, new):64        return tuple.__new__(cls, (old, new))65    __slots__ = ()  # no attributes allowed66    @property67    def old(self):68        return self[0]69    @property70    def new(self):71        return self[1]72    def __repr__(self):73        return '%s(old=%r, new=%r)' % (self.__class__.__name__, self.old, self.new)74def highlight(old, new):75    """Given two strings, return a `HighlightedDiff` containing the strings76    with markup identifying the parts that changed.77    >>> highlight('Testify is great.', 'testify is gr8')78    HighlightedDiff(old='<T>estify is gr<eat.>', new='<t>estify is gr<8>')79    """80    oldchanges, newchanges = get_line_changed_regions(old, new)81    return HighlightedDiff(highlight_regions(old, oldchanges),82                           highlight_regions(new, newchanges))...

chunk_generators.py

Source:chunk_generators.py

...5    """A chunk generator for rendered Markdown content.6    This works like a standard RawDiffChunkGenerator, but handles showing7    changes within a line for HTML-rendered Markdown.8    """9    def get_line_changed_regions(self, old_line_num, old_line,10                                 new_line_num, new_line):11        """Return information on changes between two lines.12        This returns the regions between lines of rendered Markdown that13        have changed.14        Only text changes are highlighted, and not formatting changes (such as15        the addition of bold text).16        """17        return \18            super(MarkdownDiffChunkGenerator, self).get_line_changed_regions(19                old_line_num,20                strip_tags(old_line),21                new_line_num,...

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