tests/mockblackbox.py

stabletailgraph: add test cases challenging the open merge stack

This adds three more complex test cases with situations requiring tricky
state update in the stack-based iteration (arriving soon).

from mercurial.utils import procutil

# XXX: we should probably offer a devel option to do this in blackbox directly
def getuser():
    return b'bob'


def getpid():
    return 5000


# mock the date and user apis so the output is always the same
def uisetup(ui):
    procutil.getuser = getuser
    procutil.getpid = getpid