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from alembic.testing.env import clear_staging_env, staging_env
from alembic.testing import assert_raises_message, eq_
from alembic import util
from alembic.testing.fixtures import TestBase
from alembic.testing import mock
from alembic.migration import MigrationStep, HeadMaintainer
class MigrationTest(TestBase):
def up_(self, rev):
return MigrationStep.upgrade_from_script(
self.env.revision_map, rev)
def down_(self, rev):
return MigrationStep.downgrade_from_script(
self.env.revision_map, rev)
def _assert_downgrade(self, destination, source, expected, expected_heads):
revs = self.env._downgrade_revs(destination, source)
eq_(
revs, expected
)
heads = set(util.to_tuple(source, default=()))
head = HeadMaintainer(mock.Mock(), heads)
for rev in revs:
head.update_to_step(rev)
eq_(head.heads, expected_heads)
def _assert_upgrade(self, destination, source, expected, expected_heads):
revs = self.env._upgrade_revs(destination, source)
eq_(
revs, expected
)
heads = set(util.to_tuple(source, default=()))
head = HeadMaintainer(mock.Mock(), heads)
for rev in revs:
head.update_to_step(rev)
eq_(head.heads, expected_heads)
class RevisionPathTest(MigrationTest):
@classmethod
def setup_class(cls):
cls.env = env = staging_env()
cls.a = env.generate_revision(util.rev_id(), '->a', refresh=True)
cls.b = env.generate_revision(util.rev_id(), 'a->b', refresh=True)
cls.c = env.generate_revision(util.rev_id(), 'b->c', refresh=True)
cls.d = env.generate_revision(util.rev_id(), 'c->d', refresh=True)
cls.e = env.generate_revision(util.rev_id(), 'd->e', refresh=True)
@classmethod
def teardown_class(cls):
clear_staging_env()
def test_upgrade_path(self):
a, b, c, d, e = self.a, self.b, self.c, self.d, self.e
self._assert_upgrade(
e.revision, c.revision,
[
self.up_(d),
self.up_(e)
],
set([e.revision])
)
self._assert_upgrade(
c.revision, None,
[
self.up_(a),
self.up_(b),
self.up_(c),
],
set([c.revision])
)
def test_relative_upgrade_path(self):
a, b, c, d, e = self.a, self.b, self.c, self.d, self.e
self._assert_upgrade(
"+2", a.revision,
[
self.up_(b),
self.up_(c),
],
set([c.revision])
)
self._assert_upgrade(
"+1", a.revision,
[
self.up_(b)
],
set([b.revision])
)
self._assert_upgrade(
"+3", b.revision,
[self.up_(c), self.up_(d), self.up_(e)],
set([e.revision])
)
def test_invalid_relative_upgrade_path(self):
a, b, c, d, e = self.a, self.b, self.c, self.d, self.e
assert_raises_message(
util.CommandError,
"Relative revision -2 didn't produce 2 migrations",
self.env._upgrade_revs, "-2", b.revision
)
assert_raises_message(
util.CommandError,
r"Relative revision \+5 didn't produce 5 migrations",
self.env._upgrade_revs, "+5", b.revision
)
def test_downgrade_path(self):
a, b, c, d, e = self.a, self.b, self.c, self.d, self.e
self._assert_downgrade(
c.revision, e.revision,
[self.down_(e), self.down_(d)],
set([c.revision])
)
self._assert_downgrade(
None, c.revision,
[self.down_(c), self.down_(b), self.down_(a)],
set()
)
def test_relative_downgrade_path(self):
a, b, c, d, e = self.a, self.b, self.c, self.d, self.e
self._assert_downgrade(
"-1", c.revision,
[self.down_(c)],
set([b.revision])
)
self._assert_downgrade(
"-3", e.revision,
[self.down_(e), self.down_(d), self.down_(c)],
set([b.revision])
)
def test_invalid_relative_downgrade_path(self):
a, b, c, d, e = self.a, self.b, self.c, self.d, self.e
assert_raises_message(
util.CommandError,
"Relative revision -5 didn't produce 5 migrations",
self.env._downgrade_revs, "-5", b.revision
)
assert_raises_message(
util.CommandError,
r"Relative revision \+2 didn't produce 2 migrations",
self.env._downgrade_revs, "+2", b.revision
)
def test_invalid_move_rev_to_none(self):
a, b, c, d, e = self.a, self.b, self.c, self.d, self.e
assert_raises_message(
util.CommandError,
r"Destination %s is not a valid downgrade "
"target from current head\(s\)" % b.revision[0:3],
self.env._downgrade_revs, b.revision[0:3], None
)
def test_invalid_move_higher_to_lower(self):
a, b, c, d, e = self.a, self.b, self.c, self.d, self.e
assert_raises_message(
util.CommandError,
r"Destination %s is not a valid downgrade "
"target from current head\(s\)" % c.revision[0:4],
self.env._downgrade_revs, c.revision[0:4], b.revision
)
class BranchedPathTest(MigrationTest):
@classmethod
def setup_class(cls):
cls.env = env = staging_env()
cls.a = env.generate_revision(util.rev_id(), '->a', refresh=True)
cls.b = env.generate_revision(util.rev_id(), 'a->b', refresh=True)
cls.c1 = env.generate_revision(
util.rev_id(), 'b->c1',
branch_labels='c1branch',
refresh=True)
cls.d1 = env.generate_revision(util.rev_id(), 'c1->d1', refresh=True)
cls.c2 = env.generate_revision(
util.rev_id(), 'b->c2',
branch_labels='c2branch',
head=cls.b.revision, refresh=True, splice=True)
cls.d2 = env.generate_revision(
util.rev_id(), 'c2->d2',
head=cls.c2.revision, refresh=True)
@classmethod
def teardown_class(cls):
clear_staging_env()
def test_stamp_down_across_multiple_branch_to_branchpoint(self):
a, b, c1, d1, c2, d2 = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2
)
revs = self.env._stamp_revs(
self.b.revision, [self.d1.revision, self.c2.revision])
eq_(len(revs), 1)
eq_(
revs[0].merge_branch_idents,
# DELETE d1 revision, UPDATE c2 to b
([self.d1.revision], self.c2.revision, self.b.revision)
)
def test_stamp_to_labeled_base_multiple_heads(self):
a, b, c1, d1, c2, d2 = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2
)
revs = self.env._stamp_revs(
"c1branch@base", [self.d1.revision, self.c2.revision])
eq_(len(revs), 1)
assert revs[0].should_delete_branch
eq_(revs[0].delete_version_num, self.d1.revision)
def test_stamp_to_labeled_head_multiple_heads(self):
a, b, c1, d1, c2, d2 = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2
)
revs = self.env._stamp_revs(
"c2branch@head", [self.d1.revision, self.c2.revision])
eq_(len(revs), 1)
eq_(
revs[0].merge_branch_idents,
# the c1branch remains unchanged
([], self.c2.revision, self.d2.revision)
)
def test_upgrade_single_branch(self):
a, b, c1, d1, c2, d2 = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2
)
self._assert_upgrade(
d1.revision, b.revision,
[self.up_(c1), self.up_(d1)],
set([d1.revision])
)
def test_upgrade_multiple_branch(self):
# move from a single head to multiple heads
a, b, c1, d1, c2, d2 = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2
)
self._assert_upgrade(
(d1.revision, d2.revision), a.revision,
[self.up_(b), self.up_(c2), self.up_(d2),
self.up_(c1), self.up_(d1)],
set([d1.revision, d2.revision])
)
def test_downgrade_multiple_branch(self):
a, b, c1, d1, c2, d2 = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2
)
self._assert_downgrade(
a.revision, (d1.revision, d2.revision),
[self.down_(d1), self.down_(c1), self.down_(d2),
self.down_(c2), self.down_(b)],
set([a.revision])
)
class ForestTest(MigrationTest):
@classmethod
def setup_class(cls):
cls.env = env = staging_env()
cls.a1 = env.generate_revision(util.rev_id(), '->a1', refresh=True)
cls.b1 = env.generate_revision(util.rev_id(), 'a1->b1', refresh=True)
cls.a2 = env.generate_revision(
util.rev_id(), '->a2', head=(),
refresh=True)
cls.b2 = env.generate_revision(
util.rev_id(), 'a2->b2', head=cls.a2.revision, refresh=True)
@classmethod
def teardown_class(cls):
clear_staging_env()
def test_base_to_heads(self):
a1, b1, a2, b2 = self.a1, self.b1, self.a2, self.b2
eq_(
self.env._upgrade_revs("heads", "base"),
[self.up_(a2), self.up_(b2), self.up_(a1), self.up_(b1), ]
)
class MergedPathTest(MigrationTest):
@classmethod
def setup_class(cls):
cls.env = env = staging_env()
cls.a = env.generate_revision(util.rev_id(), '->a', refresh=True)
cls.b = env.generate_revision(util.rev_id(), 'a->b', refresh=True)
cls.c1 = env.generate_revision(util.rev_id(), 'b->c1', refresh=True)
cls.d1 = env.generate_revision(util.rev_id(), 'c1->d1', refresh=True)
cls.c2 = env.generate_revision(
util.rev_id(), 'b->c2',
branch_labels='c2branch',
head=cls.b.revision, refresh=True, splice=True)
cls.d2 = env.generate_revision(
util.rev_id(), 'c2->d2',
head=cls.c2.revision, refresh=True)
cls.e = env.generate_revision(
util.rev_id(), 'merge d1 and d2',
head=(cls.d1.revision, cls.d2.revision), refresh=True
)
cls.f = env.generate_revision(util.rev_id(), 'e->f', refresh=True)
@classmethod
def teardown_class(cls):
clear_staging_env()
def test_stamp_down_across_merge_point_branch(self):
a, b, c1, d1, c2, d2, e, f = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2,
self.e, self.f
)
revs = self.env._stamp_revs(self.c2.revision, [self.e.revision])
eq_(len(revs), 1)
eq_(
revs[0].merge_branch_idents,
# no deletes, UPDATE e to c2
([], self.e.revision, self.c2.revision)
)
def test_stamp_down_across_merge_prior_branching(self):
a, b, c1, d1, c2, d2, e, f = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2,
self.e, self.f
)
revs = self.env._stamp_revs(self.a.revision, [self.e.revision])
eq_(len(revs), 1)
eq_(
revs[0].merge_branch_idents,
# no deletes, UPDATE e to c2
([], self.e.revision, self.a.revision)
)
def test_stamp_up_across_merge_from_single_branch(self):
a, b, c1, d1, c2, d2, e, f = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2,
self.e, self.f
)
revs = self.env._stamp_revs(self.e.revision, [self.c2.revision])
eq_(len(revs), 1)
eq_(
revs[0].merge_branch_idents,
# no deletes, UPDATE e to c2
([], self.c2.revision, self.e.revision)
)
def test_stamp_labled_head_across_merge_from_multiple_branch(self):
a, b, c1, d1, c2, d2, e, f = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2,
self.e, self.f
)
# this is testing that filter_for_lineage() checks for
# d1 both in terms of "c2branch" as well as that the "head"
# revision "f" is the head of both d1 and d2
revs = self.env._stamp_revs(
"c2branch@head", [self.d1.revision, self.c2.revision])
eq_(len(revs), 1)
eq_(
revs[0].merge_branch_idents,
# DELETE d1 revision, UPDATE c2 to e
([self.d1.revision], self.c2.revision, self.f.revision)
)
def test_stamp_up_across_merge_from_multiple_branch(self):
a, b, c1, d1, c2, d2, e, f = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2,
self.e, self.f
)
revs = self.env._stamp_revs(
self.e.revision, [self.d1.revision, self.c2.revision])
eq_(len(revs), 1)
eq_(
revs[0].merge_branch_idents,
# DELETE d1 revision, UPDATE c2 to e
([self.d1.revision], self.c2.revision, self.e.revision)
)
def test_stamp_up_across_merge_prior_branching(self):
a, b, c1, d1, c2, d2, e, f = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2,
self.e, self.f
)
revs = self.env._stamp_revs(self.e.revision, [self.b.revision])
eq_(len(revs), 1)
eq_(
revs[0].merge_branch_idents,
# no deletes, UPDATE e to c2
([], self.b.revision, self.e.revision)
)
def test_upgrade_across_merge_point(self):
a, b, c1, d1, c2, d2, e, f = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2,
self.e, self.f
)
eq_(
self.env._upgrade_revs(f.revision, b.revision),
[
self.up_(c2),
self.up_(d2),
self.up_(c1), # b->c1, create new branch
self.up_(d1),
self.up_(e), # d1/d2 -> e, merge branches
# (DELETE d2, UPDATE d1->e)
self.up_(f)
]
)
def test_downgrade_across_merge_point(self):
a, b, c1, d1, c2, d2, e, f = (
self.a, self.b, self.c1, self.d1, self.c2, self.d2,
self.e, self.f
)
eq_(
self.env._downgrade_revs(b.revision, f.revision),
[
self.down_(f),
self.down_(e), # e -> d1 and d2, unmerge branches
# (UPDATE e->d1, INSERT d2)
self.down_(d1),
self.down_(c1),
self.down_(d2),
self.down_(c2), # c2->b, delete branch
]
)
|
