tests/test-revlog-raw.py

45941:346af7687c6f

    rlog = revlog.revlog(tvfs, name)
    return rlog


def appendrev(rlog, text, tr, isext=False, isdelta=True):
    '''Append a revision. If isext is True, set the EXTSTORED flag so flag
    processor will be used (and rawtext is different from text). If isdelta is
    True, force the revision to be a delta, otherwise it's full text.
    '''
    nextrev = len(rlog)
    p1 = rlog.node(nextrev - 1)
    p2 = node.nullid
    if isext:
        flags = revlog.REVIDX_EXTSTORED

        # Restore storedeltachains. It is always True, see revlog.__init__
        rlog._storedeltachains = True


def addgroupcopy(rlog, tr, destname=b'_destrevlog.i', optimaldelta=True):
    '''Copy revlog to destname using revlog.addgroup. Return the copied revlog.

    This emulates push or pull. They use changegroup. Changegroup requires
    repo to work. We don't have a repo, so a dummy changegroup is used.

    If optimaldelta is True, use optimized delta parent, so the destination
    revlog could probably reuse it. Otherwise it builds sub-optimal delta, and
    the destination revlog needs more work to use it.

    This exercises some revlog.addgroup (and revlog._addrevision(text=None))
    code path, which is not covered by "appendrev" alone.
    '''

    class dummychangegroup(object):
        @staticmethod
        def deltachunk(pnode):
            pnode = pnode or node.nullid

    dlog.addgroup(dummydeltas, linkmap, tr)
    return dlog


def lowlevelcopy(rlog, tr, destname=b'_destrevlog.i'):
    '''Like addgroupcopy, but use the low level revlog._addrevision directly.

    It exercises some code paths that are hard to reach easily otherwise.
    '''
    dlog = newrevlog(destname, recreate=True)
    for r in rlog:
        p1 = rlog.node(r - 1)
        p2 = node.nullid
        if r == 0 or (rlog.flags(r) & revlog.REVIDX_EXTSTORED):

# Utilities to generate revisions for testing


def genbits(n):
    '''Given a number n, generate (2 ** (n * 2) + 1) numbers in range(2 ** n).
    i.e. the generated numbers have a width of n bits.

    The combination of two adjacent numbers will cover all possible cases.
    That is to say, given any x, y where both x, and y are in range(2 ** n),
    there is an x followed immediately by y in the generated sequence.
    '''
    m = 2 ** n

    # Gray Code. See https://en.wikipedia.org/wiki/Gray_code
    gray = lambda x: x ^ (x >> 1)
    reversegray = {gray(i): i for i in range(m)}

    '''Given a revision number, generate dummy text'''
    return b''.join(b'%d\n' % j for j in range(-1, rev % 5))


def writecases(rlog, tr):
    '''Write some revisions interested to the test.

    The test is interested in 3 properties of a revision:

        - Is it a delta or a full text? (isdelta)
          This is to catch some delta application issues.

    Where "r.delta", "r.ext", and "r.empty" are booleans matching properties
    mentioned above.

    Return expected [(text, rawtext)].
    '''
    result = []
    for i, x in enumerate(genbits(3)):
        isdelta, isext, isempty = bool(x & 1), bool(x & 2), bool(x & 4)
        if isempty:
            text = b''

45942:89a2afe31e82

    rlog = revlog.revlog(tvfs, name)
    return rlog


def appendrev(rlog, text, tr, isext=False, isdelta=True):
    """Append a revision. If isext is True, set the EXTSTORED flag so flag
    processor will be used (and rawtext is different from text). If isdelta is
    True, force the revision to be a delta, otherwise it's full text.
    """
    nextrev = len(rlog)
    p1 = rlog.node(nextrev - 1)
    p2 = node.nullid
    if isext:
        flags = revlog.REVIDX_EXTSTORED

        # Restore storedeltachains. It is always True, see revlog.__init__
        rlog._storedeltachains = True


def addgroupcopy(rlog, tr, destname=b'_destrevlog.i', optimaldelta=True):
    """Copy revlog to destname using revlog.addgroup. Return the copied revlog.

    This emulates push or pull. They use changegroup. Changegroup requires
    repo to work. We don't have a repo, so a dummy changegroup is used.

    If optimaldelta is True, use optimized delta parent, so the destination
    revlog could probably reuse it. Otherwise it builds sub-optimal delta, and
    the destination revlog needs more work to use it.

    This exercises some revlog.addgroup (and revlog._addrevision(text=None))
    code path, which is not covered by "appendrev" alone.
    """

    class dummychangegroup(object):
        @staticmethod
        def deltachunk(pnode):
            pnode = pnode or node.nullid

    dlog.addgroup(dummydeltas, linkmap, tr)
    return dlog


def lowlevelcopy(rlog, tr, destname=b'_destrevlog.i'):
    """Like addgroupcopy, but use the low level revlog._addrevision directly.

    It exercises some code paths that are hard to reach easily otherwise.
    """
    dlog = newrevlog(destname, recreate=True)
    for r in rlog:
        p1 = rlog.node(r - 1)
        p2 = node.nullid
        if r == 0 or (rlog.flags(r) & revlog.REVIDX_EXTSTORED):

# Utilities to generate revisions for testing


def genbits(n):
    """Given a number n, generate (2 ** (n * 2) + 1) numbers in range(2 ** n).
    i.e. the generated numbers have a width of n bits.

    The combination of two adjacent numbers will cover all possible cases.
    That is to say, given any x, y where both x, and y are in range(2 ** n),
    there is an x followed immediately by y in the generated sequence.
    """
    m = 2 ** n

    # Gray Code. See https://en.wikipedia.org/wiki/Gray_code
    gray = lambda x: x ^ (x >> 1)
    reversegray = {gray(i): i for i in range(m)}

    '''Given a revision number, generate dummy text'''
    return b''.join(b'%d\n' % j for j in range(-1, rev % 5))


def writecases(rlog, tr):
    """Write some revisions interested to the test.

    The test is interested in 3 properties of a revision:

        - Is it a delta or a full text? (isdelta)
          This is to catch some delta application issues.

    Where "r.delta", "r.ext", and "r.empty" are booleans matching properties
    mentioned above.

    Return expected [(text, rawtext)].
    """
    result = []
    for i, x in enumerate(genbits(3)):
        isdelta, isext, isempty = bool(x & 1), bool(x & 2), bool(x & 4)
        if isempty:
            text = b''