def test_has_needed_dependencies(self):
doc = self.doc0
cs1 = Changeset(doc.get_id(), 'user', [doc.get_root_changeset()])
assert doc.has_needed_dependencies(cs1)
cs2 = Changeset(doc.get_id(), 'user', [cs1])
assert not doc.has_needed_dependencies(cs2)
doc.receive_changeset(cs1)
assert doc.has_needed_dependencies(cs2)
cs3 = Changeset(doc.get_id(), 'user', [cs1, cs2])
assert not doc.has_needed_dependencies(cs3)
doc.receive_changeset(cs2)
assert doc.has_needed_dependencies(cs3)
cs4 = Changeset(doc.get_id(), 'user', [cs3, "555"])
assert not doc.has_needed_dependencies(cs4)
doc.receive_changeset(cs3)
assert not doc.has_needed_dependencies(cs4)
cs5 = Changeset(doc.get_id(), 'user', [cs1])
cs5.set_id("555")
doc.receive_changeset(cs5)
cs4.relink_changesets(doc.all_known_changesets)
assert cs5 in cs4.get_parents()
assert cs4.has_full_dependency_info()
assert doc.has_needed_dependencies(cs4)
def test_delete_overlaping_ranges_revered(self):
"""
Same opperations as previous test, but order of branches is reversed
(B now before A)
"""
s = '0123456789'
doc = Document(snapshot=s)
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
# construct branch A, which deletes all but the first three
# and last three characters.
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=4, val=2))
A0.set_id('1A')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('sd', [], offset=3, val=2))
doc.receive_changeset(A1)
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('sd', [], offset=2, val=2))
doc.receive_changeset(A2)
assert doc.get_snapshot() == '0189'
# Branch B has common parent with A. It deletes all but '89'
# User saw '0123456789' and deleted '3456'
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=3, val=4)
B0.add_op(opB0)
B0.set_id('0B')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index > b_index
assert doc.get_snapshot() == '0189'
# User saw '012789' and deleted '27'
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('sd', [], offset=2, val=2)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == '0189'
# Delete Range not known by branch A
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('sd', [], offset=1, val=2)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
assert doc.get_snapshot() == '09'
# combine these braches again
C = Changeset(doc.get_id(), 'u2', [A2, B2])
C.add_op(Op('si', [], offset=1, val='12345678'))
doc.receive_changeset(C)
assert doc.get_snapshot() == '0123456789'
def build_changesets_from_tuples(css_data, doc):
"""
When testing its easiest to write the desired changesets as tuples, then
this will convert that list of tuples into a list of changesets for the
desired doc.
"""
css = []
for cs_data in css_data:
action, offset, val, deps, _id = cs_data
deps = [doc.get_root_changeset() if dep == 'root' else dep
for dep in deps]
cs = Changeset(doc.get_id(), 'u1', deps)
cs.add_op(Op(action, [], offset=offset, val=val))
cs.set_id(_id)
css.append(cs)
return css
def test_two_deletes_in_first_branch_reverse(self):
"""
Same opperations as previous test, but order of branches is reversed
(B now before A)
"""
s = 'ab123cd456gh789ik'
doc = Document(snapshot=s)
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=7, val=2))
A0.set_id('1A')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('sd', [], offset=10, val=3))
doc.receive_changeset(A1)
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('si', [], offset=7, val='ef'))
doc.receive_changeset(A2)
assert doc.get_snapshot() == 'ab123cdef6ghik'
# Branch B has common parent with A. First it deletes a
# partialy overlaping range in A
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=8, val=2)
B0.add_op(opB0)
B0.set_id('0B')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index > b_index
assert doc.get_snapshot() == 'ab123cdefghik'
# Delete range partially overlaping range in A
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('sd', [], offset=10, val=2)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == 'ab123cdefghik'
# Delete Range unaffected by branch A
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('sd', [], offset=2, val=3)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
assert doc.get_snapshot() == 'abcdefghik'
# combine these braches again
C = Changeset(doc.get_id(), 'u2', [A2, B2])
C.add_op(Op('si', [], offset=9, val='j'))
doc.receive_changeset(C)
assert doc.get_snapshot() == 'abcdefghijk'
def test_two_deletes_in_first_branch(self):
""" 01234567890123456 (helpful index of characters in doc)"""
s = 'ab123cd456gh789ik'
doc = Document(snapshot=s)
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
# construct branch A, which has two string deletes, then
# adds text
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=7, val=2))
A0.set_id('A')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('sd', [], offset=10, val=3))
doc.receive_changeset(A1)
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('si', [], offset=7, val='ef'))
doc.receive_changeset(A2)
assert doc.get_snapshot() == 'ab123cdef6ghik'
# Branch B has common parent with A. First it deletes a
# partialy overlaping range in A
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=8, val=2)
B0.add_op(opB0)
B0.set_id('B')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index < b_index
assert doc.get_snapshot() == 'ab123cdefghik'
# Delete range partially overlaping range in A
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('sd', [], offset=10, val=2)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == 'ab123cdefghik'
# Delete Range unaffected by branch A
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('sd', [], offset=2, val=3)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
assert doc.get_snapshot() == 'abcdefghik'
# combine these braches again
C = Changeset(doc.get_id(), 'u2', [A2, B2])
C.add_op(Op('si', [], offset=9, val='j'))
doc.receive_changeset(C)
assert doc.get_snapshot() == 'abcdefghijk'
def test_multiple_dependencies(self):
"""
-- B ---- E
/ /
root -- A -- D
\ /
-- C --
"""
doc = Document(snapshot='')
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
B = Changeset(doc.get_id(), "user0", [root])
B.set_id('b')
doc.receive_changeset(B)
A = Changeset(doc.get_id(), "user1", [root])
A.set_id('a')
doc.receive_changeset(A)
assert A.get_unaccounted_changesets() == []
assert B.get_unaccounted_changesets() == [A]
C = Changeset(doc.get_id(), "user2", [root])
C.set_id('c')
doc.receive_changeset(C)
assert A.get_unaccounted_changesets() == []
assert B.get_unaccounted_changesets() == [A]
assert C.get_unaccounted_changesets() == [A,B]
# test_multiple_dependencies_common_base
D = Changeset(doc.get_id(), "user0", [C,A])
D.set_id('d')
doc.receive_changeset(D)
assert A.get_unaccounted_changesets() == []
assert B.get_unaccounted_changesets() == [A]
assert C.get_unaccounted_changesets() == [A,B]
assert D.get_unaccounted_changesets() == [B]
E = Changeset(doc.get_id(), 'user1', [B, D])
E.set_id('e')
doc.receive_changeset(E)
assert A.get_unaccounted_changesets() == []
assert B.get_unaccounted_changesets() == [A]
assert C.get_unaccounted_changesets() == [A,B]
assert D.get_unaccounted_changesets() == [B]
assert E.get_unaccounted_changesets() == []
def test_one_delete_in_first_branch(self):
"""
There is one delete in the first branch, multiple in branch B, then
each has more string inserts.
"""
doc = Document(snapshot='123abcde789')
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
# construct branch A, which begins with a string delete, then
# adds text
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=3, val=5))
A0.set_id('A')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('si', [], offset=3, val='456'))
doc.receive_changeset(A1)
assert doc.get_snapshot() == '123456789'
# Branch B has common parent with A. B has three deletes, some of which
# overlap the delete in branch A
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=4, val=2)
B0.add_op(opB0)
B0.set_id('B')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index < b_index
assert doc.get_snapshot() == '123456789'
# Partially overlaping delete
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('sd', [], offset=6, val=2)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == '1234569'
# Delete Range unaffected by branch A
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('sd', [], offset=1, val=1)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
assert doc.get_snapshot() == '134569'
# combine these braches again
C = Changeset(doc.get_id(), 'u2', [A1, B2])
C.add_op(Op('si', [], offset=1, val='2'))
C.add_op(Op('si', [], offset=6, val='78'))
doc.receive_changeset(C)
assert doc.get_snapshot() == '123456789'
def test_multiple_dependencies(self):
"""
-- B ---- E
/ /
root -- A -- D
\ /
-- C --
"""
doc = Document(snapshot='')
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
B = Changeset(doc.get_id(), "user0", [root])
B.set_id('b')
doc.receive_changeset(B)
A = Changeset(doc.get_id(), "user1", [root])
A.set_id('a')
doc.receive_changeset(A)
assert set(doc.get_dependencies()) == set([B,A])
assert doc.get_ordered_changesets() == [root, A, B]
C = Changeset(doc.get_id(), "user2", [root])
C.set_id('c')
doc.receive_changeset(C)
assert set(doc.get_dependencies()) == set([B,A,C])
assert doc.get_ordered_changesets() == [root, A, B, C]
assert doc.get_ordered_changesets() == doc.tree_to_list()
# test_multiple_dependencies_common_base
D = Changeset(doc.get_id(), "user0", [C,A])
D.set_id('d')
doc.receive_changeset(D)
assert set(doc.get_dependencies()) == set([B,D])
assert doc.get_ordered_changesets() == [root, A, B, C, D]
assert doc.get_ordered_changesets() == doc.tree_to_list()
E = Changeset(doc.get_id(), 'user1', [B, D])
E.set_id('e')
doc.receive_changeset(E)
assert doc.get_dependencies() == [E]
assert doc.get_ordered_changesets() == [root, A, B, C, D, E]
assert doc.get_ordered_changesets() == doc.tree_to_list()
def xtest_relink_dependency(self):
dep = Changeset('doc_id', 'user_id', [])
dep.set_id('defined_id')
# a cs with no dependencies should never relink
assert not self.cs0.relink_changesets(dep)
# cs does not need given dep
cs1 = Changeset('doc_id', 'user_id', [self.cs0])
assert not cs1.relink_changesets(dep)
assert cs1.get_dependencies() == [self.cs0]
# cs already has given dep info
cs2 = Changeset('doc_id', 'user_id', [self.cs0, dep])
assert not cs2.relink_changesets(dep)
assert cs2.get_dependencies() == [self.cs0, dep]
# cs needed and relinked given dep
cs3 = Changeset('doc_id', 'user_id', [self.cs0, 'defined_id'])
assert cs3.relink_changesets(dep)
assert cs3.get_dependencies() == [self.cs0, dep]
def test_one_delete_in_first_branch_reversed(self):
"""
Same opperations as previous test, but order of branches is reversed
(B now before A)
"""
doc = Document(snapshot='123abcde789')
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=3, val=5))
A0.set_id('1A')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('si', [], offset=3, val='456'))
doc.receive_changeset(A1)
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=4, val=2)
B0.add_op(opB0)
B0.set_id('0B')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index > b_index
assert doc.get_snapshot() == '123456789'
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('sd', [], offset=6, val=2)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == '1234569'
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('sd', [], offset=1, val=1)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
assert doc.get_snapshot() == '134569'
# combine these braches again
C = Changeset(doc.get_id(), 'u2', [A1, B2])
C.add_op(Op('si', [], offset=1, val='2'))
C.add_op(Op('si', [], offset=6, val='78'))
doc.receive_changeset(C)
assert doc.get_snapshot() == '123456789'
def test_delete_in_second_branch(self):
"""
"""
doc = Document(snapshot='abcdefghij')
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
# construct branch A, which begins with a string delete
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=5, val=5))
A0.set_id('2A')
doc.receive_changeset(A0)
assert doc.get_snapshot() == 'abcde'
# Branch B has common parent with A. It inserts strings at the end
# which should not be deleted.
B0 = Changeset(doc.get_id(), 'u2', [root])
for i in xrange(10):
op = Op('si', [], offset=10 + i, val=str(i))
B0.add_op(op)
B0.set_id('1B')
doc.receive_changeset(B0)
assert doc.get_snapshot() == 'abcde0123456789'
def test_consecutive_inserts(self):
doc = self.doc1
root = self.root1
# Branch A
A0 = Changeset(doc.get_id(), 'u1', [root])
vA0 = ['1', '2']
A0.add_op(Op('ai', [], offset=2, val=vA0))
A0.set_id('A')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
vA1 = ['3', '4']
A1.add_op(Op('ai', [], offset=4, val=vA1))
doc.receive_changeset(A1)
A2 = Changeset(doc.get_id(), 'u1', [A1])
vA2 = ['8', '9']
A2.add_op(Op('ai', [], offset=9, val=vA2))
doc.receive_changeset(A2)
A3 = Changeset(doc.get_id(), 'u1', [A2])
vA3 = ['0']
A3.add_op(Op('ai', [], offset=11, val=vA3))
doc.receive_changeset(A3)
result = ['ABCD',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'MNOP',
'QRST',
'8', '9', '0',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
# Now B has a series of inserts
B0 = Changeset(doc.get_id(), 'u1', [root])
vB0 = ['1b', '2b']
B0.add_op(Op('ai', [], offset=1, val=vB0))
B0.set_id('B')
doc.receive_changeset(B0)
result = ['ABCD',
'1b', '2b',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'MNOP',
'QRST',
'8', '9', '0',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
B1 = Changeset(doc.get_id(), 'u1', [B0])
vB1 = ['3b', '4b']
B1.add_op(Op('ai', [], offset=5, val=vB1))
doc.receive_changeset(B1)
result = ['ABCD',
'1b', '2b',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'3b', '4b',
'MNOP',
'QRST',
'8', '9', '0',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
B2 = Changeset(doc.get_id(), 'u1', [B1])
vB2 = ['8b', '9b', '0b']
B2.add_op(Op('ai', [], offset=7, val=vB2))
doc.receive_changeset(B2)
result = ['ABCD',
'1b', '2b',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'3b', '4b', '8b', '9b', '0b',
'MNOP',
'QRST',
'8', '9', '0',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
B3 = Changeset(doc.get_id(), 'u1', [B2])
vB3 = ['BBBB']
B3.add_op(Op('ai', [], offset=12, val=vB3))
doc.receive_changeset(B3)
result = ['ABCD',
'1b', '2b',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'3b', '4b', '8b', '9b', '0b',
'MNOP',
'QRST',
'8', '9', '0',
'BBBB',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
def test_consecutive_inserts_reversed(self):
"""
Same as the previous test except branch B gets applied before branch A.
"""
doc = self.doc1
root = self.root1
# Branch A
A0 = Changeset(doc.get_id(), 'u1', [root])
vA0 = ['1', '2']
A0.add_op(Op('ai', [], offset=2, val=vA0))
A0.set_id('1A')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
vA1 = ['3', '4']
A1.add_op(Op('ai', [], offset=4, val=vA1))
doc.receive_changeset(A1)
A2 = Changeset(doc.get_id(), 'u1', [A1])
vA2 = ['8', '9']
A2.add_op(Op('ai', [], offset=9, val=vA2))
doc.receive_changeset(A2)
A3 = Changeset(doc.get_id(), 'u1', [A2])
vA3 = ['0']
A3.add_op(Op('ai', [], offset=11, val=vA3))
doc.receive_changeset(A3)
result = ['ABCD',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'MNOP',
'QRST',
'8', '9', '0',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
# Now B has a series of inserts
B0 = Changeset(doc.get_id(), 'u1', [root])
vB0 = ['1b', '2b']
B0.add_op(Op('ai', [], offset=1, val=vB0))
B0.set_id('0B')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index > b_index
result = ['ABCD',
'1b', '2b',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'MNOP',
'QRST',
'8', '9', '0',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
B1 = Changeset(doc.get_id(), 'u1', [B0])
vB1 = ['3b', '4b']
B1.add_op(Op('ai', [], offset=5, val=vB1))
doc.receive_changeset(B1)
result = ['ABCD',
'1b', '2b',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'3b', '4b',
'MNOP',
'QRST',
'8', '9', '0',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
B2 = Changeset(doc.get_id(), 'u1', [B1])
vB2 = ['8b', '9b', '0b']
B2.add_op(Op('ai', [], offset=7, val=vB2))
doc.receive_changeset(B2)
result = ['ABCD',
'1b', '2b',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'3b', '4b', '8b', '9b', '0b',
'MNOP',
'QRST',
'8', '9', '0',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
B3 = Changeset(doc.get_id(), 'u1', [B2])
vB3 = ['BBBB']
B3.add_op(Op('ai', [], offset=12, val=vB3))
doc.receive_changeset(B3)
result = ['ABCD',
'1b', '2b',
'EFGH',
'1', '2', '3', '4',
'IJKL',
'3b', '4b', '8b', '9b', '0b',
'MNOP',
'QRST',
'BBBB',
'8', '9', '0',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
def setup_method(self, method):
s1 = ['ABCD',
'EFGH',
'IJKL',
'MNOP',
'QRST',
'UVWX',
'YZ']
doc = Document(snapshot=s1)
doc.HAS_EVENT_LOOP = False
self.doc = doc
self.root = self.doc.get_root_changeset()
# establish the reusable changesets
# Branch A inserts two new array elements, and add text to those two.
# It also inserts text into three existing elements, before any array
# insert, in the middle, and after the last array insert.
A0 = Changeset(doc.get_id(), 'u1', [self.root])
vA0 = ['02', '4']
A0.add_op(Op('ai', [], offset=2, val=vA0))
A0.set_id('A')
self.A0 = A0
A1 = Changeset(doc.get_id(), 'u1', [A0])
vA1 = ['5', '89']
A1.add_op(Op('ai', [], offset=6, val=vA1))
self.A1 = A1
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('si', [2], offset=1, val='1'))
A2.add_op(Op('si', [3], offset=0, val='3'))
self.A2 = A2
A3 = Changeset(doc.get_id(), 'u1', [self.A2])
A3.add_op(Op('si', [6], offset=1, val='67'))
self.A3 = A3
A4 = Changeset(doc.get_id(), 'u1', [A3])
A4.add_op(Op('si', [0], offset=0, val='a'))
A4.add_op(Op('si', [4], offset=0, val='b'))
self.A4 = A4
A5 = Changeset(doc.get_id(), 'u1', [A4])
A5.add_op(Op('si', [9], offset=0, val='c'))
self.A5 = A5
# Branch B performs similar actions to branch A.
B0 = Changeset(doc.get_id(), 'u2', [self.root])
vB0a, vB0b = ['lm', 'ipsm'], ['or', 't']
opB0a = Op('ai', [], offset=2, val=vB0a)
B0.add_op(opB0a)
opB0b = Op('ai', [], offset=6, val=vB0b)
B0.add_op(opB0b)
B0.set_id('B')
self.B0 = B0
# Now B inserts strings into the elements it created
B1 = Changeset(doc.get_id(), 'u2', [B0])
B1.add_op(Op('si', [2], offset=1, val='ore'))
B1.add_op(Op('si', [3], offset=3, val='u'))
B1.add_op(Op('si', [6], offset=0, val='dol'))
B1.add_op(Op('si', [7], offset=0, val='si'))
B1.set_id('B1')
self.B1 = B1
# B inserts strings into each original element, including elements A
# had edited
B2 = Changeset(doc.get_id(), 'u2', [B1])
B2.add_op(Op('si', [0], offset=0, val='t'))
B2.add_op(Op('si', [1], offset=0, val='u'))
B2.add_op(Op('si', [4], offset=0, val='v'))
B2.add_op(Op('si', [5], offset=0, val='w'))
B2.add_op(Op('si', [8], offset=0, val='x'))
B2.add_op(Op('si', [9], offset=0, val='y'))
B2.add_op(Op('si', [10], offset=0, val='z'))
B2.set_id('B2')
self.B2 = B2
def test_one_delete_in_first_branch_reversed(self):
"""
Same test as above, except branch B gets applied before branch A.
"""
doc = self.doc1
root = self.root1
# construct branch A, which begins with a string delete, then
# adds text
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('ad', [], offset=3, val=2))
A0.set_id('1A')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
v1 = ['0123', '4567']
A1.add_op(Op('ai', [], offset=3, val=v1))
doc.receive_changeset(A1)
result = ['ABCD',
'EFGH',
'IJKL',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
# Branch B has common parent with A. B has three deletes, some of which
# overlap the delete in branch A
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('ad', [], offset=2, val=2)
B0.add_op(opB0)
B0.set_id('0B')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index > b_index
result = ['ABCD',
'EFGH',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
# Partially overlaping delete
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('ad', [], offset=2, val=1)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
result = ['ABCD',
'EFGH',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
# Delete Range unaffected by branch A
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('ad', [], offset=1, val=1)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
result = ['ABCD',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
B3 = Changeset(doc.get_id(), 'u2', [B2])
vB3 = ['BBBBB', 'CCCCC']
opB3 = Op('ai', [], offset=1, val=vB3)
B3.add_op(opB3)
B3.set_id('B3')
doc.receive_changeset(B3)
result = ['ABCD',
'BBBBB',
'CCCCC',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
B4 = Changeset(doc.get_id(), 'u2', [B3])
vB4 = ['DDDDD', 'EEEEE']
opB4 = Op('ai', [], offset=3, val=vB4)
B4.add_op(opB4)
B4.set_id('B4')
doc.receive_changeset(B4)
result = ['ABCD',
'BBBBB',
'CCCCC',
'DDDDD',
'EEEEE',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
def setup_method(self, method):
s1 = ['ABCD',
'EFGH',
'IJKL',
'MNOP',
'QRST',
'UVWX',
'YZ']
doc = Document(snapshot=s1)
doc.HAS_EVENT_LOOP = False
self.doc = doc
self.root = self.doc.get_root_changeset()
# establish the reusable changesets
# Branch A does 1) String inserts 2) Array deletes, and 3) string
# inserts
A0 = Changeset(doc.get_id(), 'u1', [self.root])
A0.add_op(Op('si', [0], offset=2, val='0123'))
A0.set_id('A')
self.A0 = A0
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('si', [0], offset=6, val='4'))
self.A1 = A1
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('si', [4], offset=1, val='567'))
A2.add_op(Op('si', [6], offset=0, val='89'))
self.A2 = A2
A3 = Changeset(doc.get_id(), 'u1', [A2])
A3.add_op(Op('ad', [], offset=1, val=2))
self.A3 = A3
A4 = Changeset(doc.get_id(), 'u1', [A3])
A4.add_op(Op('ad', [], offset=3, val=1))
A4.add_op(Op('si', [1], offset=1, val='ab'))
self.A4 = A4
A5 = Changeset(doc.get_id(), 'u1', [A4])
A5.add_op(Op('si', [3], offset=4, val='c'))
self.A5 = A5
# Branch B Also does string inserts, then array delets, then string
# inserts
B0 = Changeset(doc.get_id(), 'u2', [self.root])
B0.add_op(Op('si', [4], offset=2, val='fg'))
B0.add_op(Op('si', [6], offset=0, val='h'))
B0.add_op(Op('si', [1], offset=4, val='ij'))
B0.add_op(Op('si', [2], offset=2, val='k'))
B0.add_op(Op('si', [5], offset=1, val='l'))
B0.add_op(Op('si', [0], offset=3, val='m'))
B0.add_op(Op('si', [3], offset=0, val='nop'))
B0.set_id('B')
self.B0 = B0
# Now B deletes array elements
B1 = Changeset(doc.get_id(), 'u2', [B0])
B1.add_op(Op('ad', [], offset=0, val=2))
B1.add_op(Op('ad', [], offset=4, val=1))
B1.set_id('B1')
self.B1 = B1
# B inserts strings into each original element, including elements A
# had edited
B2 = Changeset(doc.get_id(), 'u2', [B1])
B2.add_op(Op('si', [0], offset=3, val='qr'))
B2.add_op(Op('si', [1], offset=4, val='st'))
B2.add_op(Op('si', [2], offset=5, val='uv'))
B2.add_op(Op('si', [3], offset=0, val='wxyz'))
B2.set_id('B2')
self.B2 = B2
def setup_method(self, method):
s1 = ['ABCD',
'EFGH',
'IJKL',
'MNOP',
'QRST',
'UVWX',
'YZ']
doc = Document(snapshot=s1)
doc.HAS_EVENT_LOOP = False
self.doc = doc
self.root = self.doc.get_root_changeset()
# establish the reusable changesets
# Branch A 1) deletes some from three strings in the array, 2) deletes
# array elements and 3) deletes more partial strings
A0 = Changeset(doc.get_id(), 'u1', [self.root])
A0.add_op(Op('sd', [1], offset=2, val=2)) # deletes 'GH'
A0.set_id('A')
self.A0 = A0
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('sd', [3], offset=0, val=3)) # deletes 'MNO'
self.A1 = A1
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('sd', [5], offset=1, val=1)) # 'V'
self.A2 = A2
A3 = Changeset(doc.get_id(), 'u1', [A2])
A3.add_op(Op('ad', [], offset=1, val=2)) # ['EF', 'IJKL']
self.A3 = A3
A4 = Changeset(doc.get_id(), 'u1', [A3])
A4.add_op(Op('ad', [], offset=2, val=1)) # ['QRST']
A4.add_op(Op('sd', [2], offset=2, val=1)) # 'X'
A4.set_id('A4')
self.A4 = A4
A5 = Changeset(doc.get_id(), 'u1', [A4])
A5.add_op(Op('sd', [3], offset=0, val=1)) # Deletes 'Y'
self.A5 = A5
# Branch B performs similar actions to branch A. It deletes text, some
# of which is overlapping, 2) deletes elements, some overlap, and 3)
# deletes more text
B0 = Changeset(doc.get_id(), 'u2', [self.root])
B0.add_op(Op('sd', [3], offset=1, val=2)) # Deletes 'NO'
B0.add_op(Op('sd', [5], offset=1, val=2)) # Deletes 'VW'
B0.add_op(Op('sd', [2], offset=2, val=1)) # 'K'
B0.set_id('B')
self.B0 = B0
# Now B deletes strings
B1 = Changeset(doc.get_id(), 'u2', [B0])
B1.add_op(Op('sd', [4], offset=0, val=2)) # 'QR'
B1.add_op(Op('sd', [0], offset=2, val=1)) # 'C'
B1.add_op(Op('sd', [6], offset=0, val=1)) # 'Y'
B1.set_id('B1')
self.B1 = B1
# B deletes elements
B2 = Changeset(doc.get_id(), 'u2', [B1])
B2.add_op(Op('ad', [], offset=0, val=2)) # ['ABD', 'EFGH']
B2.add_op(Op('ad', [], offset=4, val=1)) # ['Z']
B2.set_id('B2')
self.B2 = B2
# B deletes a bit more text
B3 = Changeset(doc.get_id(), 'u2', [B2])
B3.add_op(Op('sd', [2], offset=0, val=1)) # 'S'
B3.add_op(Op('sd', [3], offset=0, val=2)) # 'UX'
B3.set_id('B3')
self.B3 = B3
def test_complex_tree(self):
"""
Some complex tree.
C -- G -- H -------- K
/ / \
A -- B -- D -- F -- J -- L -- M--
\ /
E --- I
Should be:
A B C G D E I F H K J L M
"""
doc = Document(snapshot='')
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
A = Changeset(doc.get_id(), "user0", [root])
A.set_id('A')
doc.receive_changeset(A)
assert doc.get_ordered_changesets() == [root, A]
assert doc.get_ordered_changesets() == doc.tree_to_list()
B = Changeset(doc.get_id(),"user1",[A])
B.set_id('b')
doc.receive_changeset(B)
assert doc.get_ordered_changesets() == [root,A,B]
assert doc.get_ordered_changesets() == doc.tree_to_list()
C = Changeset(doc.get_id(),"user3",[B])
C.set_id('c')
doc.receive_changeset(C)
assert doc.get_ordered_changesets() == [root,A,B,C]
assert doc.get_ordered_changesets() == doc.tree_to_list()
D = Changeset(doc.get_id(),"user4",[B])
D.set_id('d')
doc.receive_changeset(D)
assert doc.get_ordered_changesets() == [root,A,B,C,D]
assert doc.get_ordered_changesets() == doc.tree_to_list()
E = Changeset(doc.get_id(),"user5",[D])
E.set_id('e')
doc.receive_changeset(E)
assert doc.get_ordered_changesets() == [root,A,B,C,D,E]
assert doc.get_ordered_changesets() == doc.tree_to_list()
F = Changeset(doc.get_id(),"user6",[D])
F.set_id('f')
doc.receive_changeset(F)
assert doc.get_ordered_changesets() == [root,A,B,C,D,E,F]
assert doc.get_ordered_changesets() == doc.tree_to_list()
G = Changeset(doc.get_id(),"user5",[C])
G.set_id('g')
doc.receive_changeset(G)
assert doc.get_ordered_changesets() == [root,A,B,C,G,D,E,F]
assert doc.get_ordered_changesets() == doc.tree_to_list()
H = Changeset(doc.get_id(),"user5",[G,F])
H.set_id('h')
doc.receive_changeset(H)
assert doc.get_ordered_changesets() == [root,A,B,C,G,D,E,F,H]
assert doc.get_ordered_changesets() == doc.tree_to_list()
I = Changeset(doc.get_id(),"user6",[E])
I.set_id('i')
doc.receive_changeset(I)
assert doc.get_ordered_changesets() == [root,A,B,C,G,D,E,I,F,H]
assert doc.get_ordered_changesets() == doc.tree_to_list()
J = Changeset(doc.get_id(),"user5",[I,F])
J.set_id('j')
doc.receive_changeset(J)
assert doc.get_ordered_changesets() == [root,A,B,C,G,D,E,I,F,H,J]
assert doc.get_ordered_changesets() == doc.tree_to_list()
K = Changeset(doc.get_id(),"user5",[H])
K.set_id('k')
doc.receive_changeset(K)
assert doc.get_ordered_changesets() == [root,A,B,C,G,D,E,I,F,H,K,J]
assert doc.get_ordered_changesets() == doc.tree_to_list()
L = Changeset(doc.get_id(),"user5",[J])
L.set_id('l')
doc.receive_changeset(L)
assert doc.get_ordered_changesets() == [root,A,B,C,G,D,E,I,F,H,K,J,L]
assert doc.get_ordered_changesets() == doc.tree_to_list()
M = Changeset(doc.get_id(),"user5",[K,L])
M.set_id('m')
doc.receive_changeset(M)
assert doc.get_ordered_changesets() == [root,A,B,C,G,D,E,I,F,H,K,J,L,M]
assert doc.get_ordered_changesets() == doc.tree_to_list()
def test_delete_overlaping_ranges2_reversed(self):
"""
Same opperations as previous test, but order of branches is reversed
(B now before A)
"""
s = '0123456789TARGET'
doc = Document(snapshot=s)
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
# branch deletes the '234567' in three ops.
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=4, val=2))
A0.set_id('1A0')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('sd', [], offset=3, val=2))
A1.set_id('A1')
doc.receive_changeset(A1)
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('sd', [], offset=2, val=2))
A2.set_id('A2')
doc.receive_changeset(A2)
assert doc.get_snapshot() == '0189TARGET'
# Branch B has common parent with A. It deletes all but
# 'TARGET' in three ops.
# User Saw '0123456789TARGET', deleted '234', which branch A
# already did.
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=2, val=3)
B0.add_op(opB0)
B0.set_id('0B0')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index > b_index
assert doc.get_snapshot() == '0189TARGET'
# User Saw '0156789TARGET', deleted '567', which branch A
# already did.
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('sd', [], offset=2, val=3)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == '0189TARGET'
# User Saw '0189TARGET', deleted '0189', which branch A has
# NOT done.
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('sd', [], offset=0, val=4)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
assert doc.get_snapshot() == 'TARGET'
def test_set_id(self):
cs0 = Changeset('doc_id', 'user_id', [])
assert cs0.set_id('randomid')
assert cs0.get_id() == 'randomid'
def test_one_delete_in_first_branch(self):
"""
There is one delete in the first branch, multiple in branch B, then
each has more string inserts.
"""
doc = self.doc1
root = self.root1
# construct branch A, which begins with a string delete, then
# adds text
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('ad', [], offset=3, val=2))
A0.set_id('A')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
v1 = ['0123', '4567']
A1.add_op(Op('ai', [], offset=3, val=v1))
doc.receive_changeset(A1)
result = ['ABCD',
'EFGH',
'IJKL',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
# Branch B has common parent with A. B has three deletes, some of which
# overlap the delete in branch A
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('ad', [], offset=2, val=2)
B0.add_op(opB0)
B0.set_id('B')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index < b_index
assert opB0.t_offset == 2
assert opB0.t_val == 1
result = ['ABCD',
'EFGH',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
# Partially overlaping delete
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('ad', [], offset=2, val=1)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
result = ['ABCD',
'EFGH',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
assert opB1.t_val == 0
assert opB1.is_noop()
# Delete Range unaffected by branch A
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('ad', [], offset=1, val=1)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
result = ['ABCD',
'0123',
'4567',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
assert opB2.t_offset == 1
assert opB2.t_val == 1
# Insert before the Delete Range
B3 = Changeset(doc.get_id(), 'u2', [B2])
vB3 = ['BBBBB', 'CCCCC']
opB3 = Op('ai', [], offset=1, val=vB3)
B3.add_op(opB3)
B3.set_id('B3')
doc.receive_changeset(B3)
result = ['ABCD',
'0123',
'4567',
'BBBBB',
'CCCCC',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
# Insert After the Delete Range
B4 = Changeset(doc.get_id(), 'u2', [B3])
vB4 = ['DDDDD', 'EEEEE']
opB4 = Op('ai', [], offset=3, val=vB4)
B4.add_op(opB4)
B4.set_id('B4')
doc.receive_changeset(B4)
result = ['ABCD',
'0123',
'4567',
'BBBBB',
'CCCCC',
'DDDDD',
'EEEEE',
'UVWX',
'YZ']
assert doc.get_snapshot() == result
def test_missing_changesets(self):
doc = Document(snapshot='')
doc.HAS_EVENT_LOOP = False
assert doc.missing_changesets == set([])
assert doc.pending_new_changesets == []
root = doc.get_root_changeset()
A = Changeset(doc.get_id(), "dummyuser", [root])
doc.receive_changeset(A)
assert doc.missing_changesets == set([])
assert doc.pending_new_changesets == []
# Just one Changeset gets put in pending list
B = Changeset(doc.get_id(), "user1", ["C"])
B.set_id("B")
doc.receive_changeset(B)
assert doc.get_ordered_changesets() == [root, A]
assert doc.missing_changesets == set(["C"])
assert doc.pending_new_changesets == [B]
C = Changeset(doc.get_id(), "user1", [A])
C.set_id("C")
doc.receive_changeset(C)
assert doc.missing_changesets == set([])
assert doc.pending_new_changesets == []
assert B.get_parents() == [C]
assert doc.get_ordered_changesets() == [root, A, C, B]
# Now a string of changesets put on pending list
D = Changeset(doc.get_id(), "user1", ["G"])
D.set_id("D")
doc.receive_changeset(D)
assert doc.missing_changesets == set(["G"])
assert doc.pending_new_changesets == [D]
assert doc.get_ordered_changesets() == [root, A, C, B]
E = Changeset(doc.get_id(), "user1", ["D"])
E.set_id("E")
doc.receive_changeset(E)
assert E.get_parents() == [D]
assert doc.missing_changesets == set(["G"])
assert doc.pending_new_changesets == [D, E]
assert doc.get_ordered_changesets() == [root, A, C, B]
F = Changeset(doc.get_id(), "user1", ["E"])
F.set_id("F")
doc.receive_changeset(F)
assert doc.missing_changesets ==set( ["G"])
assert doc.pending_new_changesets == [D, E, F]
assert doc.get_ordered_changesets() == [root, A, C, B]
G = Changeset(doc.get_id(), "user1", ["C"])
G.set_id("G")
doc.receive_changeset(G)
assert doc.missing_changesets == set([])
assert doc.pending_new_changesets == []
assert doc.get_ordered_changesets() == [root, A, C, B, G, D, E, F]
assert doc.get_ordered_changesets() == doc.tree_to_list()
def setup_method(self, method):
s1 = ['ABC',
'DEF',
'GHI',
'JKL',
'MNO',
'PQR',
'STU',
'VWX',
'YZ']
doc = Document(snapshot=s1)
doc.HAS_EVENT_LOOP = False
self.doc = doc
self.root = self.doc.get_root_changeset()
# establish the reusable changesets
# Branch A does 1) Array inserts 2) Array deletes 3) string inserts,
# including into elements it created, 4) string deletes, including into
# elements it created.
A0 = Changeset(doc.get_id(), 'u1', [self.root])
A0.add_op(Op('ai', [], offset=1, val=['012']))
A0.add_op(Op('ai', [], offset=5, val=['345', '678']))
A0.set_id('A')
self.A0 = A0
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('ad', [], offset=2, val=1)) # Deletes ['DEF']
A1.add_op(Op('ad', [], offset=3, val=2)) # Deletes ['JKL', '345']
self.A1 = A1
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('si', [3], offset=3, val='90')) # to create '67890'
A2.add_op(Op('si', [4], offset=1, val='abc')) # to create 'MabcNo'
self.A2 = A2
A3 = Changeset(doc.get_id(), 'u1', [A2])
A3.add_op(Op('sd', [1], offset=1, val=1)) # to create '02'
A3.add_op(Op('sd', [6], offset=0, val=2)) # to create 'U'
self.A3 = A3
# Branch B makes different edits, but of the same type and order as
# branch A
B0 = Changeset(doc.get_id(), 'u1', [self.root])
B0.add_op(Op('ai', [], offset=0, val=['ghi', 'jkl']))
B0.add_op(Op('ai', [], offset=5, val=['lmn', 'opq']))
B0.set_id('B')
self.B0 = B0
B1 = Changeset(doc.get_id(), 'u1', [B0])
B1.add_op(Op('ad', [], offset=1, val=2)) # Deletes ['jkl', 'ABC']
B1.add_op(Op('ad', [], offset=10, val=1)) # Deletes ['YZ']
self.B1 = B1
B2 = Changeset(doc.get_id(), 'u1', [B1])
B2.add_op(Op('sd', [4], offset=0, val=2))
B2.add_op(Op('si', [4], offset=1, val='rst'))
B2.add_op(Op('si', [4], offset=0, val='op')) # to create 'opqrst'
B2.add_op(Op('si', [5], offset=0, val='xyz')) # to create 'xyzJKL'
B2.add_op(Op('si', [6], offset=1, val='uvw')) # to create 'MuvwNo'
self.B2 = B2
B3 = Changeset(doc.get_id(), 'u1', [B2])
B3.add_op(Op('sd', [0], offset=2, val=1)) # to create 'gh'
B3.add_op(Op('sd', [8], offset=1, val=1)) # to create 'SU'
self.B3 = B3
# Branch C does a different mix of ops. 1) string insert, 2) array
# delete 3) array insert, 4) string delete
C0 = Changeset(doc.get_id(), 'u1', [self.root])
C0.add_op(Op('si', [2], offset=1, val='XXX')) # create 'GXXXHI'
C0.add_op(Op('si', [4], offset=2, val='YYY')) # create 'MNYYYO'
C0.set_id('C')
self.C0 = C0
C1 = Changeset(doc.get_id(), 'u1', [C0])
C1.add_op(Op('ad', [], offset=4, val=2)) # Deletes ['MNYYYO', 'PQR']
C1.add_op(Op('ad', [], offset=6, val=1)) # Deletes ['YZ']
self.C1 = C1
C2 = Changeset(doc.get_id(), 'u1', [C1])
C2.add_op(Op('ai', [], offset=0, val=['lorem']))
C2.add_op(Op('ai', [], offset=6, val=['ipsum']))
self.C2 = C2
C3 = Changeset(doc.get_id(), 'u1', [C2])
C3.add_op(Op('sd', [5], offset=1, val=2)) # to delete 'TU'
C3.add_op(Op('sd', [6], offset=0, val=2)) # to create 'sum'
C3.add_op(Op('sd', [7], offset=2, val=1)) # to create 'VW'
self.C3 = C3
def test_overlaping_deletes_then_string_insert(self):
"""
Both branches delete all the A's from the document. Additionally, one
branch deletes all the Z's, the other all the X's. Then one inserts
'The Quick ', the other branch 'Brown Fox.' Each uses several ops to
achieve this.
NOTE: This example is slightly convoluted and hard to follow. The test
is only here because it was a reproducable failure that had no solution
at the time.
"""
s = 'ZZZZZZZAAAAAAAAAAAAAAAAAAAAAAAAAXXXXX'
doc = Document(snapshot=s)
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=0, val=32))
A0.add_op(Op('si', [], offset=0, val='T'))
A0.set_id('A0')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('si', [], offset=1, val="h"))
A1.add_op(Op('si', [], offset=2, val="e"))
A1.add_op(Op('si', [], offset=3, val=" "))
A1.set_id('A1')
doc.receive_changeset(A1)
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('si', [], offset=4, val="Q"))
A2.add_op(Op('si', [], offset=5, val="u"))
A2.add_op(Op('si', [], offset=6, val="i"))
A2.set_id('A2')
doc.receive_changeset(A2)
A3 = Changeset(doc.get_id(), 'u1', [A2])
A3.add_op(Op('si', [], offset=7, val="c"))
A3.add_op(Op('si', [], offset=8, val="k"))
A3.add_op(Op('si', [], offset=9, val=" "))
A3.set_id('A3')
doc.receive_changeset(A3)
assert doc.get_snapshot() == 'The Quick XXXXX'
# Branch B has common parent with A. It saw the original document and
# deleted everything but the Y's
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=7, val=30)
B0.add_op(opB0)
B0.set_id('B0')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index < b_index
assert doc.get_snapshot() == 'The Quick '
# User B saw only the Y's and inserted text at the end.
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('si', [], offset=7, val='Brown Fox.')
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == 'The Quick Brown Fox.'
def test_partial_overlaping_deletes(self):
"""
At the same time, two users delete the same text, then insert
different text. The union of the deletion ranges should be
deleted and the two sets of inserted text should appear in
full, side by side.
Note: This test is fairly redundant. Just don't want to delete an old
test.
"""
doc = Document(snapshot='')
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
# create a common parrent for two divergent branches
common_parent = Changeset(doc.get_id(), 'u1', [root])
common_parent.add_op(Op('si', [], offset=0, val='12345678'))
doc.receive_changeset(common_parent)
assert doc.get_snapshot() == '12345678'
# construct branch A, which begins with a string delete, then
# inserts 'abcde' in three changesets.
A0 = Changeset(doc.get_id(), 'u1', [common_parent])
A0.add_op(Op('sd', [], offset=5, val=3))
A0.add_op(Op('si', [], offset=5, val='abc'))
A0.set_id('A')
doc.receive_changeset(A0)
assert doc.get_snapshot() == '12345abc'
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('si', [], offset=8, val='d'))
doc.receive_changeset(A1)
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('si', [], offset=9, val='e'))
doc.receive_changeset(A2)
assert doc.get_snapshot() == '12345abcde'
# Branch B has common parent with A. Insert some text at the
# end, delete the same range branch A deleted, then insert
# more text
B0 = Changeset(doc.get_id(), 'u2', [common_parent])
B0.add_op(Op('si', [], offset=8, val='f'))
B0.set_id('B')
doc.receive_changeset(B0)
assert doc.get_snapshot() == '12345abcdef'
# CS with overlapping delete range
B1 = Changeset(doc.get_id(), 'u2', [B0])
B1.add_op(Op('sd', [], offset=0, val=8))
B1.add_op(Op('si', [], offset=1, val='g'))
B1.add_op(Op('si', [], offset=2, val='hi'))
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == 'abcdefghi'
B2 = Changeset(doc.get_id(), 'u2', [B1])
B2.add_op(Op('si', [], offset=4, val='jkl'))
B2.set_id('B2')
doc.receive_changeset(B2)
assert doc.get_snapshot() == 'abcdefghijkl'
# combine these braches again
C = Changeset(doc.get_id(), 'u2', [A2, B2])
C.add_op(Op('si', [], offset=6, val=' XYZ '))
doc.receive_changeset(C)
assert doc.get_snapshot() == 'abcdef XYZ ghijkl'
def test_overlaping_deletes_then_string_insert_reversed(self):
"""
Same test as the previous one, except the order of the branches is
reversed.
"""
s = 'ZZZZZZZAAAAAAAAAAAAAAAAAAAAAAAAAXXXXX'
doc = Document(snapshot=s)
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=0, val=32))
A0.add_op(Op('si', [], offset=0, val='T'))
A0.set_id('2')
doc.receive_changeset(A0)
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('si', [], offset=1, val="h"))
A1.add_op(Op('si', [], offset=2, val="e"))
A1.add_op(Op('si', [], offset=3, val=" "))
A1.set_id('A1')
doc.receive_changeset(A1)
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('si', [], offset=4, val="Q"))
A2.add_op(Op('si', [], offset=5, val="u"))
A2.add_op(Op('si', [], offset=6, val="i"))
A2.set_id('A2')
doc.receive_changeset(A2)
A3 = Changeset(doc.get_id(), 'u1', [A2])
A3.add_op(Op('si', [], offset=7, val="c"))
A3.add_op(Op('si', [], offset=8, val="k"))
A3.add_op(Op('si', [], offset=9, val=" "))
A3.set_id('A3')
doc.receive_changeset(A3)
assert doc.get_snapshot() == 'The Quick XXXXX'
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=7, val=30)
B0.add_op(opB0)
B0.set_id('1')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index > b_index
assert doc.get_snapshot() == 'The Quick '
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('si', [], offset=7, val='Brown Fox.')
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == 'Brown Fox.The Quick '
def test_multiple_css_with_same_multiple_dependencies(self):
"""
A -- B -- D--F -- G
\ \/ /
\ /\ /
- C--E-
Both F and E depend on D and C
"""
doc = Document(snapshot='')
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
A = Changeset(doc.get_id(), "user0", [root])
A.set_id('a')
doc.receive_changeset(A)
assert doc.get_ordered_changesets() == [root, A]
assert doc.get_ordered_changesets() == doc.tree_to_list()
B = Changeset(doc.get_id(), "user1", [A])
B.set_id('b')
doc.receive_changeset(B)
assert doc.get_ordered_changesets() == [root, A, B]
assert doc.get_ordered_changesets() == doc.tree_to_list()
C = Changeset(doc.get_id(), "user3", [B])
C.set_id('c')
doc.receive_changeset(C)
assert doc.get_ordered_changesets() == [root, A, B, C]
assert doc.get_ordered_changesets() == doc.tree_to_list()
D = Changeset(doc.get_id(), "user4", [B])
D.set_id('d')
doc.receive_changeset(D)
assert doc.get_ordered_changesets() == [root, A, B, C, D]
assert doc.get_ordered_changesets() == doc.tree_to_list()
E = Changeset(doc.get_id(), "user5", [C, D])
E.set_id('e')
doc.receive_changeset(E)
assert doc.get_ordered_changesets() == [root, A, B, C, D, E]
assert doc.get_ordered_changesets() == doc.tree_to_list()
F = Changeset(doc.get_id(), "user6", [C, D])
F.set_id('f')
doc.receive_changeset(F)
assert set(doc.get_dependencies()) == set([E,F])
assert doc.get_ordered_changesets() == [root, A,B,C,D,E,F]
assert doc.get_ordered_changesets() == doc.tree_to_list()
G = Changeset(doc.get_id(), "user5", [E,F])
doc.receive_changeset(G)
assert doc.get_dependencies() == [G]
assert doc.get_ordered_changesets() == [root, A, B, C, D, E, F, G]
assert doc.get_ordered_changesets() == doc.tree_to_list()
def test_delete_overlaping_ranges(self):
"""
Branch A and B independently delete the same characters in the middle
of the string using different combinations of opperations. Then they
perform other string operations that need to keep synced.
"""
s = '0123456789'
doc = Document(snapshot=s)
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
# construct branch A, which deletes all but the first three
# and last three characters.
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=4, val=2))
A0.set_id('A')
doc.receive_changeset(A0)
assert doc.get_snapshot() == '01236789'
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('sd', [], offset=3, val=2))
doc.receive_changeset(A1)
assert doc.get_snapshot() == '012789'
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('sd', [], offset=2, val=2))
doc.receive_changeset(A2)
assert doc.get_snapshot() == '0189'
# Branch B has common parent with A. It deletes all but '89'
# User saw '0123456789' and deleted '3456', which was already
# deleted in branch A.
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=3, val=4)
B0.add_op(opB0)
B0.set_id('B')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index < b_index
assert doc.get_snapshot() == '0189'
# User saw '012789' and deleted '27', which was already
# deleted in branch A.
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('sd', [], offset=2, val=2)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == '0189'
# Delete Range not known by branch A
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('sd', [], offset=1, val=2)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
assert doc.get_snapshot() == '09'
# combine these braches again
C = Changeset(doc.get_id(), 'u2', [A2, B2])
C.add_op(Op('si', [], offset=1, val='12345678'))
doc.receive_changeset(C)
assert doc.get_snapshot() == '0123456789'
def setup_method(self, method):
s1 = ['ABCD',
'EFGH',
'IJKL',
'MNOP',
'QRST',
'UVWX',
'YZ']
doc = Document(snapshot=s1)
doc.HAS_EVENT_LOOP = False
self.doc = doc
self.root = self.doc.get_root_changeset()
# establish the reusable changesets
# Branch A inserts new array elements, and deletes text from them.
# It also deletes text from three existing elements, before any array
# insert, in the middle, and after the last array insert.
A0 = Changeset(doc.get_id(), 'u1', [self.root])
vA0 = ['01234', '56789']
A0.add_op(Op('ai', [], offset=2, val=vA0))
A0.set_id('A')
self.A0 = A0
A1 = Changeset(doc.get_id(), 'u1', [A0])
vA1 = ['abcde', 'fghij']
A1.add_op(Op('ai', [], offset=6, val=vA1))
self.A1 = A1
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('sd', [2], offset=1, val=4))
A2.add_op(Op('sd', [3], offset=0, val=3))
self.A2 = A2
A3 = Changeset(doc.get_id(), 'u1', [A2])
A3.add_op(Op('sd', [6], offset=3, val=1))
self.A3 = A3
A4 = Changeset(doc.get_id(), 'u1', [A3])
A4.add_op(Op('sd', [0], offset=0, val=3))
A4.add_op(Op('sd', [4], offset=2, val=2))
self.A4 = A4
A5 = Changeset(doc.get_id(), 'u1', [A4])
A5.add_op(Op('sd', [9], offset=1, val=2))
self.A5 = A5
# Branch B performs similar actions to branch A.
# First inserts array elements
B0 = Changeset(doc.get_id(), 'u2', [self.root])
vB0a, vB0b = ['lorem', 'ipsum'], ['dolor', 'sit']
opB0a = Op('ai', [], offset=2, val=vB0a)
B0.add_op(opB0a)
opB0b = Op('ai', [], offset=6, val=vB0b)
B0.add_op(opB0b)
B0.set_id('B')
self.B0 = B0
# Now B deletes parts of strings in the elements it created
B1 = Changeset(doc.get_id(), 'u2', [B0])
B1.add_op(Op('sd', [2], offset=3, val=2))
B1.add_op(Op('sd', [3], offset=2, val=2))
B1.add_op(Op('sd', [6], offset=1, val=1))
B1.add_op(Op('sd', [7], offset=0, val=3))
B1.set_id('B1')
self.B1 = B1
# B deletes strings from each original element, including elements A
# had edited
B2 = Changeset(doc.get_id(), 'u2', [B1])
B2.add_op(Op('sd', [0], offset=1, val=3))
B2.add_op(Op('sd', [1], offset=2, val=2))
B2.add_op(Op('sd', [4], offset=0, val=1))
B2.add_op(Op('sd', [5], offset=1, val=2))
B2.add_op(Op('sd', [8], offset=2, val=1))
B2.add_op(Op('sd', [9], offset=3, val=1))
B2.add_op(Op('sd', [10], offset=0, val=1))
B2.set_id('B2')
self.B2 = B2
def test_delete_overlaping_ranges2(self):
"""
Branch A and B independently delete the same characters in the middle
of the string using different combinations of opperations. Then they
perform other string operations that need to keep synced.
"""
s = '0123456789TARGET'
doc = Document(snapshot=s)
doc.HAS_EVENT_LOOP = False
root = doc.get_root_changeset()
# branch deletes the '234567' in three ops.
A0 = Changeset(doc.get_id(), 'u1', [root])
A0.add_op(Op('sd', [], offset=4, val=2))
A0.set_id('A0')
doc.receive_changeset(A0)
assert doc.get_snapshot() == '01236789TARGET'
A1 = Changeset(doc.get_id(), 'u1', [A0])
A1.add_op(Op('sd', [], offset=3, val=2))
A1.set_id('A1')
doc.receive_changeset(A1)
assert doc.get_snapshot() == '012789TARGET'
A2 = Changeset(doc.get_id(), 'u1', [A1])
A2.add_op(Op('sd', [], offset=2, val=2))
A2.set_id('A2')
doc.receive_changeset(A2)
assert doc.get_snapshot() == '0189TARGET'
# Branch B has common parent with A. It deletes all but
# 'TARGET' in three ops.
# User Saw '0123456789TARGET', deleted '234', which branch A
# already did.
B0 = Changeset(doc.get_id(), 'u2', [root])
opB0 = Op('sd', [], offset=2, val=3)
B0.add_op(opB0)
B0.set_id('B0')
doc.receive_changeset(B0)
a_index = doc.get_ordered_changesets().index(A0)
b_index = doc.get_ordered_changesets().index(B0)
assert a_index < b_index
assert doc.get_snapshot() == '0189TARGET'
# User Saw '0156789TARGET', deleted '567', which branch A
# already did.
B1 = Changeset(doc.get_id(), 'u2', [B0])
opB1 = Op('sd', [], offset=2, val=3)
B1.add_op(opB1)
B1.set_id('B1')
doc.receive_changeset(B1)
assert doc.get_snapshot() == '0189TARGET'
# User Saw '0189TARGET', deleted '0189', which branch A has
# NOT done.
B2 = Changeset(doc.get_id(), 'u2', [B1])
opB2 = Op('sd', [], offset=0, val=4)
B2.add_op(opB2)
B2.set_id('B2')
doc.receive_changeset(B2)
assert doc.get_snapshot() == 'TARGET'
