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test_main.py
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test_main.py
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from __future__ import with_statement
import copy
from operator import isMappingType
import os
import sys
from contextlib import contextmanager
from fudge import Fake, patched_context
from nose.tools import ok_, eq_, raises
from fabric.decorators import hosts, roles, task
from fabric.main import (get_hosts, parse_arguments, _merge, _escape_split,
load_fabfile as _load_fabfile, list_commands, _task_names, _crawl,
crawl, COMMANDS_HEADER, NESTED_REMINDER)
import fabric.state
from fabric.state import _AttributeDict
from fabric.tasks import Task
from utils import (mock_streams, patched_env, eq_, FabricTest, fabfile,
path_prefix)
# Stupid load_fabfile wrapper to hide newly added return value.
# WTB more free time to rewrite all this with objects :)
def load_fabfile(*args, **kwargs):
return _load_fabfile(*args, **kwargs)[:2]
#
# Basic CLI stuff
#
def test_argument_parsing():
for args, output in [
# Basic
('abc', ('abc', [], {}, [], [], [])),
# Arg
('ab:c', ('ab', ['c'], {}, [], [], [])),
# Kwarg
('a:b=c', ('a', [], {'b':'c'}, [], [], [])),
# Arg and kwarg
('a:b=c,d', ('a', ['d'], {'b':'c'}, [], [], [])),
# Multiple kwargs
('a:b=c,d=e', ('a', [], {'b':'c','d':'e'}, [], [], [])),
# Host
('abc:host=foo', ('abc', [], {}, ['foo'], [], [])),
# Hosts with single host
('abc:hosts=foo', ('abc', [], {}, ['foo'], [], [])),
# Hosts with multiple hosts
# Note: in a real shell, one would need to quote or escape "foo;bar".
# But in pure-Python that would get interpreted literally, so we don't.
('abc:hosts=foo;bar', ('abc', [], {}, ['foo', 'bar'], [], [])),
# Exclude hosts
('abc:hosts=foo;bar,exclude_hosts=foo', ('abc', [], {}, ['foo', 'bar'], [], ['foo'])),
('abc:hosts=foo;bar,exclude_hosts=foo;bar', ('abc', [], {}, ['foo', 'bar'], [], ['foo','bar'])),
# Empty string args
("task:x=y,z=", ('task', [], {'x': 'y', 'z': ''}, [], [], [])),
("task:foo,,x=y", ('task', ['foo', ''], {'x': 'y'}, [], [], [])),
]:
yield eq_, parse_arguments([args]), [output]
def test_escaped_task_arg_split():
"""
Allow backslashes to escape the task argument separator character
"""
argstr = r"foo,bar\,biz\,baz,what comes after baz?"
eq_(
_escape_split(',', argstr),
['foo', 'bar,biz,baz', 'what comes after baz?']
)
#
# Host/role decorators
#
def eq_hosts(command, host_list):
eq_(set(get_hosts(command, [], [], [])), set(host_list))
def test_hosts_decorator_by_itself():
"""
Use of @hosts only
"""
host_list = ['a', 'b']
@hosts(*host_list)
def command():
pass
eq_hosts(command, host_list)
fake_roles = {
'r1': ['a', 'b'],
'r2': ['b', 'c']
}
@patched_env({'roledefs': fake_roles})
def test_roles_decorator_by_itself():
"""
Use of @roles only
"""
@roles('r1')
def command():
pass
eq_hosts(command, ['a', 'b'])
@patched_env({'roledefs': fake_roles})
def test_hosts_and_roles_together():
"""
Use of @roles and @hosts together results in union of both
"""
@roles('r1', 'r2')
@hosts('a')
def command():
pass
eq_hosts(command, ['a', 'b', 'c'])
tuple_roles = {
'r1': ('a', 'b'),
'r2': ('b', 'c'),
}
@patched_env({'roledefs': tuple_roles})
def test_roles_as_tuples():
"""
Test that a list of roles as a tuple succeeds
"""
@roles('r1')
def command():
pass
eq_hosts(command, ['a', 'b'])
@patched_env({'hosts': ('foo', 'bar')})
def test_hosts_as_tuples():
"""
Test that a list of hosts as a tuple succeeds
"""
def command():
pass
eq_hosts(command, ['foo', 'bar'])
@patched_env({'hosts': ['foo']})
def test_hosts_decorator_overrides_env_hosts():
"""
If @hosts is used it replaces any env.hosts value
"""
@hosts('bar')
def command():
pass
eq_hosts(command, ['bar'])
assert 'foo' not in get_hosts(command, [], [], [])
@patched_env({'hosts': ['foo']})
def test_hosts_decorator_overrides_env_hosts_with_task_decorator_first():
"""
If @hosts is used it replaces any env.hosts value even with @task
"""
@task
@hosts('bar')
def command():
pass
eq_hosts(command, ['bar'])
assert 'foo' not in get_hosts(command, [], [])
@patched_env({'hosts': ['foo']})
def test_hosts_decorator_overrides_env_hosts_with_task_decorator_last():
@hosts('bar')
@task
def command():
pass
eq_hosts(command, ['bar'])
assert 'foo' not in get_hosts(command, [], [])
@patched_env({'hosts': [' foo ', 'bar '], 'roles': [], 'exclude_hosts': []})
def test_hosts_stripped_env_hosts():
"""
Make sure hosts defined in env.hosts are cleaned of extra spaces
"""
def command():
pass
eq_hosts(command, ['foo', 'bar'])
spaced_roles = {
'r1': [' a ', ' b '],
'r2': ['b', 'c'],
}
@patched_env({'roledefs': spaced_roles})
def test_roles_stripped_env_hosts():
"""
Make sure hosts defined in env.roles are cleaned of extra spaces
"""
@roles('r1')
def command():
pass
eq_hosts(command, ['a', 'b'])
def test_hosts_decorator_expands_single_iterable():
"""
@hosts(iterable) should behave like @hosts(*iterable)
"""
host_list = ['foo', 'bar']
@hosts(host_list)
def command():
pass
eq_(command.hosts, host_list)
def test_roles_decorator_expands_single_iterable():
"""
@roles(iterable) should behave like @roles(*iterable)
"""
role_list = ['foo', 'bar']
@roles(role_list)
def command():
pass
eq_(command.roles, role_list)
#
# Host exclusion
#
def dummy(): pass
def test_get_hosts_excludes_cli_exclude_hosts_from_cli_hosts():
assert 'foo' not in get_hosts(dummy, ['foo', 'bar'], [], ['foo'])
def test_get_hosts_excludes_cli_exclude_hosts_from_decorator_hosts():
assert 'foo' not in get_hosts(hosts('foo', 'bar')(dummy), [], [], ['foo'])
@patched_env({'hosts': ['foo', 'bar'], 'exclude_hosts': ['foo']})
def test_get_hosts_excludes_global_exclude_hosts_from_global_hosts():
assert 'foo' not in get_hosts(dummy, [], [], [])
#
# Basic role behavior
#
@patched_env({'roledefs': fake_roles})
@raises(SystemExit)
@mock_streams('stderr')
def test_aborts_on_nonexistent_roles():
"""
Aborts if any given roles aren't found
"""
_merge([], ['badrole'])
lazy_role = {'r1': lambda: ['a', 'b']}
@patched_env({'roledefs': lazy_role})
def test_lazy_roles():
"""
Roles may be callables returning lists, as well as regular lists
"""
@roles('r1')
def command():
pass
eq_hosts(command, ['a', 'b'])
#
# Fabfile loading
#
def run_load_fabfile(path, sys_path):
# Module-esque object
fake_module = Fake().has_attr(__dict__={})
# Fake __import__
importer = Fake(callable=True).returns(fake_module)
# Snapshot sys.path for restore
orig_path = copy.copy(sys.path)
# Update with fake path
sys.path = sys_path
# Test for side effects
load_fabfile(path, importer=importer)
eq_(sys.path, sys_path)
# Restore
sys.path = orig_path
def test_load_fabfile_should_not_remove_real_path_elements():
for fabfile_path, sys_dot_path in (
# Directory not in path
('subdir/fabfile.py', ['not_subdir']),
('fabfile.py', ['nope']),
# Directory in path, but not at front
('subdir/fabfile.py', ['not_subdir', 'subdir']),
('fabfile.py', ['not_subdir', '']),
('fabfile.py', ['not_subdir', '', 'also_not_subdir']),
# Directory in path, and at front already
('subdir/fabfile.py', ['subdir']),
('subdir/fabfile.py', ['subdir', 'not_subdir']),
('fabfile.py', ['', 'some_dir', 'some_other_dir']),
):
yield run_load_fabfile, fabfile_path, sys_dot_path
#
# Namespacing and new-style tasks
#
class TestTaskAliases(FabricTest):
def test_flat_alias(self):
f = fabfile("flat_alias.py")
with path_prefix(f):
docs, funcs = load_fabfile(f)
eq_(len(funcs), 2)
ok_("foo" in funcs)
ok_("foo_aliased" in funcs)
def test_nested_alias(self):
f = fabfile("nested_alias.py")
with path_prefix(f):
docs, funcs = load_fabfile(f)
ok_("nested" in funcs)
eq_(len(funcs["nested"]), 2)
ok_("foo" in funcs["nested"])
ok_("foo_aliased" in funcs["nested"])
def test_flat_aliases(self):
f = fabfile("flat_aliases.py")
with path_prefix(f):
docs, funcs = load_fabfile(f)
eq_(len(funcs), 3)
ok_("foo" in funcs)
ok_("foo_aliased" in funcs)
ok_("foo_aliased_two" in funcs)
def test_nested_alias(self):
f = fabfile("nested_aliases.py")
with path_prefix(f):
docs, funcs = load_fabfile(f)
ok_("nested" in funcs)
eq_(len(funcs["nested"]), 3)
ok_("foo" in funcs["nested"])
ok_("foo_aliased" in funcs["nested"])
ok_("foo_aliased_two" in funcs["nested"])
class TestNamespaces(FabricTest):
def setup(self):
# Parent class preserves current env
super(TestNamespaces, self).setup()
# Reset new-style-tests flag so running tests via Fab itself doesn't
# muck with it.
import fabric.state
if 'new_style_tasks' in fabric.state.env:
del fabric.state.env['new_style_tasks']
def test_implicit_discovery(self):
"""
Default to automatically collecting all tasks in a fabfile module
"""
implicit = fabfile("implicit_fabfile.py")
with path_prefix(implicit):
docs, funcs = load_fabfile(implicit)
eq_(len(funcs), 2)
ok_("foo" in funcs)
ok_("bar" in funcs)
def test_explicit_discovery(self):
"""
If __all__ is present, only collect the tasks it specifies
"""
explicit = fabfile("explicit_fabfile.py")
with path_prefix(explicit):
docs, funcs = load_fabfile(explicit)
eq_(len(funcs), 1)
ok_("foo" in funcs)
ok_("bar" not in funcs)
def test_should_load_decorated_tasks_only_if_one_is_found(self):
"""
If any new-style tasks are found, *only* new-style tasks should load
"""
module = fabfile('decorated_fabfile.py')
with path_prefix(module):
docs, funcs = load_fabfile(module)
eq_(len(funcs), 1)
ok_('foo' in funcs)
def test_class_based_tasks_are_found_with_proper_name(self):
"""
Wrapped new-style tasks should preserve their function names
"""
module = fabfile('decorated_fabfile_with_classbased_task.py')
from fabric.state import env
with path_prefix(module):
docs, funcs = load_fabfile(module)
eq_(len(funcs), 1)
ok_('foo' in funcs)
def test_recursion_steps_into_nontask_modules(self):
"""
Recursive loading will continue through modules with no tasks
"""
module = fabfile('deep')
with path_prefix(module):
docs, funcs = load_fabfile(module)
eq_(len(funcs), 1)
ok_('submodule.subsubmodule.deeptask' in _task_names(funcs))
def test_newstyle_task_presence_skips_classic_task_modules(self):
"""
Classic-task-only modules shouldn't add tasks if any new-style tasks exist
"""
module = fabfile('deep')
with path_prefix(module):
docs, funcs = load_fabfile(module)
eq_(len(funcs), 1)
ok_('submodule.classic_task' not in _task_names(funcs))
#
# --list output
#
def eq_output(docstring, format_, expected):
return eq_(
"\n".join(list_commands(docstring, format_)),
expected
)
def list_output(module, format_, expected):
module = fabfile(module)
with path_prefix(module):
docstring, tasks = load_fabfile(module)
with patched_context(fabric.state, 'commands', tasks):
eq_output(docstring, format_, expected)
def test_list_output():
lead = ":\n\n "
normal_head = COMMANDS_HEADER + lead
nested_head = COMMANDS_HEADER + NESTED_REMINDER + lead
for desc, module, format_, expected in (
("shorthand (& with namespacing)", 'deep', 'short', "submodule.subsubmodule.deeptask"),
("normal (& with namespacing)", 'deep', 'normal', normal_head + "submodule.subsubmodule.deeptask"),
("normal (with docstring)", 'docstring', 'normal', normal_head + "foo Foos!"),
("nested (leaf only)", 'deep', 'nested', nested_head + """submodule:
subsubmodule:
deeptask"""),
("nested (full)", 'tree', 'nested', nested_head + """build_docs
deploy
db:
migrate
system:
install_package
debian:
update_apt"""),
):
list_output.description = "--list output: %s" % desc
yield list_output, module, format_, expected
del list_output.description
def name_to_task(name):
t = Task()
t.name = name
return t
def strings_to_tasks(d):
ret = {}
for key, value in d.iteritems():
if isMappingType(value):
val = strings_to_tasks(value)
else:
val = name_to_task(value)
ret[key] = val
return ret
def test_task_names():
for desc, input_, output in (
('top level (single)', {'a': 5}, ['a']),
('top level (multiple, sorting)', {'a': 5, 'b': 6}, ['a', 'b']),
('just nested', {'a': {'b': 5}}, ['a.b']),
('mixed', {'a': 5, 'b': {'c': 6}}, ['a', 'b.c']),
('top level comes before nested', {'z': 5, 'b': {'c': 6}}, ['z', 'b.c']),
('peers sorted equally', {'z': 5, 'b': {'c': 6}, 'd': {'e': 7}}, ['z', 'b.c', 'd.e']),
(
'complex tree',
{
'z': 5,
'b': {
'c': 6,
'd': {
'e': {
'f': '7'
}
},
'g': 8
},
'h': 9,
'w': {
'y': 10
}
},
['h', 'z', 'b.c', 'b.g', 'b.d.e.f', 'w.y']
),
):
eq_.description = "task name flattening: %s" % desc
yield eq_, _task_names(strings_to_tasks(input_)), output
del eq_.description
def test_crawl():
for desc, name, mapping, output in (
("base case", 'a', {'a': 5}, 5),
("one level", 'a.b', {'a': {'b': 5}}, 5),
("deep", 'a.b.c.d.e', {'a': {'b': {'c': {'d': {'e': 5}}}}}, 5),
("full tree", 'a.b.c', {'a': {'b': {'c': 5}, 'd': 6}, 'z': 7}, 5)
):
eq_.description = "crawling dotted names: %s" % desc
yield eq_, _crawl(name, mapping), output
del eq_.description
def test_mapping_task_classes():
"""
Task classes implementing the mapping interface shouldn't break --list
"""
list_output('mapping', 'normal', COMMANDS_HEADER + """:\n
mapping_task""")
def test_default_task_listings():
"""
@task(default=True) should cause task to also load under module's name
"""
for format_, expected in (
('short', """mymodule
mymodule.long_task_name"""),
('normal', COMMANDS_HEADER + """:\n
mymodule
mymodule.long_task_name"""),
('nested', COMMANDS_HEADER + NESTED_REMINDER + """:\n
mymodule:
long_task_name""")
):
list_output.description = "Default task --list output: %s" % format_
yield list_output, 'default_tasks', format_, expected
del list_output.description
def test_default_task_loading():
"""
crawl() should return default tasks where found, instead of module objs
"""
docs, tasks = load_fabfile(fabfile('default_tasks'))
ok_(isinstance(crawl('mymodule', tasks), Task))
def test_aliases_appear_in_fab_list():
"""
--list should include aliases
"""
list_output('nested_alias', 'short', """nested.foo
nested.foo_aliased""")