ansible/test/units/playbook/role/test_role.py

# (c) 2012-2014, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

from collections.abc import Container

import pytest

from units.compat import unittest
from unittest.mock import patch, MagicMock

from ansible.errors import AnsibleParserError
from ansible.playbook.block import Block

from units.mock.loader import DictDataLoader
from units.mock.path import mock_unfrackpath_noop

from ansible.playbook.role import Role
from ansible.playbook.role.include import RoleInclude
from ansible.playbook.role import hash_params


class TestHashParams(unittest.TestCase):
    def test(self):
        params = {'foo': 'bar'}
        res = hash_params(params)
        self._assert_set(res)
        self._assert_hashable(res)

    @staticmethod
    def _assert_hashable(res):
        hash(res)

    def _assert_set(self, res):
        self.assertIsInstance(res, frozenset)

    def test_dict_tuple(self):
        params = {'foo': (1, 'bar',)}
        res = hash_params(params)
        self._assert_set(res)

    def test_tuple(self):
        params = (1, None, 'foo')
        res = hash_params(params)
        self._assert_hashable(res)

    def test_tuple_dict(self):
        params = ({'foo': 'bar'}, 37)
        res = hash_params(params)
        self._assert_hashable(res)

    def test_list(self):
        params = ['foo', 'bar', 1, 37, None]
        res = hash_params(params)
        self._assert_set(res)
        self._assert_hashable(res)

    def test_dict_with_list_value(self):
        params = {'foo': [1, 4, 'bar']}
        res = hash_params(params)
        self._assert_set(res)
        self._assert_hashable(res)

    def test_empty_set(self):
        params = set([])
        res = hash_params(params)
        self._assert_hashable(res)
        self._assert_set(res)

    def test_generator(self):
        def my_generator():
            yield

        params = my_generator()
        res = hash_params(params)
        self._assert_hashable(res)
        assert list(params)

    def test_container_but_not_iterable(self):
        # This is a Container that is not iterable, which is unlikely but...
        class MyContainer(Container):
            def __init__(self, _some_thing):
                pass

            def __contains__(self, item):
                """Implementation omitted, since it will never be called."""

        params = MyContainer('foo bar')

        with pytest.raises(TypeError) as ex:
            hash_params(params)

        assert ex.value.args == ("'MyContainer' object is not iterable",)

    def test_param_dict_dupe_values(self):
        params1 = {'foo': False}
        params2 = {'bar': False}

        res1 = hash_params(params1)
        res2 = hash_params(params2)

        hash1 = hash(res1)
        hash2 = hash(res2)
        self.assertNotEqual(res1, res2)
        self.assertNotEqual(hash1, hash2)

    def test_param_dupe(self):
        params1 = {
            # 'from_files': {},
            'tags': [],
            u'testvalue': False,
            u'testvalue2': True,
            # 'when': []
        }
        params2 = {
            # 'from_files': {},
            'tags': [],
            u'testvalue': True,
            u'testvalue2': False,
            # 'when': []
        }
        res1 = hash_params(params1)
        res2 = hash_params(params2)

        self.assertNotEqual(hash(res1), hash(res2))
        self.assertNotEqual(res1, res2)

        params_dict = {}
        params_dict[res1] = 'params1'
        params_dict[res2] = 'params2'

        self.assertEqual(len(params_dict), 2)

        del params_dict[res2]
        self.assertEqual(len(params_dict), 1)

        for key in params_dict:
            self.assertTrue(key in params_dict)
            self.assertIn(key, params_dict)


class TestRole(unittest.TestCase):

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_with_tasks(self):

        fake_loader = DictDataLoader({
            "/etc/ansible/roles/foo_tasks/tasks/main.yml": """
            - shell: echo 'hello world'
            """,
        })

        mock_play = MagicMock()
        mock_play.role_cache = {}

        i = RoleInclude.load('foo_tasks', play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play)

        self.assertEqual(str(r), 'foo_tasks')
        self.assertEqual(len(r._task_blocks), 1)
        assert isinstance(r._task_blocks[0], Block)

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_with_tasks_dir_vs_file(self):

        fake_loader = DictDataLoader({
            "/etc/ansible/roles/foo_tasks/tasks/custom_main/foo.yml": """
            - command: bar
            """,
            "/etc/ansible/roles/foo_tasks/tasks/custom_main.yml": """
            - command: baz
            """,
        })

        mock_play = MagicMock()
        mock_play.role_cache = {}

        i = RoleInclude.load('foo_tasks', play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play, from_files=dict(tasks='custom_main'))

        self.assertEqual(r._task_blocks[0]._ds[0]['command'], 'baz')

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_with_handlers(self):

        fake_loader = DictDataLoader({
            "/etc/ansible/roles/foo_handlers/handlers/main.yml": """
            - name: test handler
              shell: echo 'hello world'
            """,
        })

        mock_play = MagicMock()
        mock_play.role_cache = {}

        i = RoleInclude.load('foo_handlers', play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play)

        self.assertEqual(len(r._handler_blocks), 1)
        assert isinstance(r._handler_blocks[0], Block)

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_with_vars(self):

        fake_loader = DictDataLoader({
            "/etc/ansible/roles/foo_vars/defaults/main.yml": """
            foo: bar
            """,
            "/etc/ansible/roles/foo_vars/vars/main.yml": """
            foo: bam
            """,
        })

        mock_play = MagicMock()
        mock_play.role_cache = {}

        i = RoleInclude.load('foo_vars', play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play)

        self.assertEqual(r._default_vars, dict(foo='bar'))
        self.assertEqual(r._role_vars, dict(foo='bam'))

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_with_vars_dirs(self):

        fake_loader = DictDataLoader({
            "/etc/ansible/roles/foo_vars/defaults/main/foo.yml": """
            foo: bar
            """,
            "/etc/ansible/roles/foo_vars/vars/main/bar.yml": """
            foo: bam
            """,
        })

        mock_play = MagicMock()
        mock_play.role_cache = {}

        i = RoleInclude.load('foo_vars', play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play)

        self.assertEqual(r._default_vars, dict(foo='bar'))
        self.assertEqual(r._role_vars, dict(foo='bam'))

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_with_vars_nested_dirs(self):

        fake_loader = DictDataLoader({
            "/etc/ansible/roles/foo_vars/defaults/main/foo/bar.yml": """
            foo: bar
            """,
            "/etc/ansible/roles/foo_vars/vars/main/bar/foo.yml": """
            foo: bam
            """,
        })

        mock_play = MagicMock()
        mock_play.role_cache = {}

        i = RoleInclude.load('foo_vars', play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play)

        self.assertEqual(r._default_vars, dict(foo='bar'))
        self.assertEqual(r._role_vars, dict(foo='bam'))

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_with_vars_nested_dirs_combined(self):

        fake_loader = DictDataLoader({
            "/etc/ansible/roles/foo_vars/defaults/main/foo/bar.yml": """
            foo: bar
            a: 1
            """,
            "/etc/ansible/roles/foo_vars/defaults/main/bar/foo.yml": """
            foo: bam
            b: 2
            """,
        })

        mock_play = MagicMock()
        mock_play.role_cache = {}

        i = RoleInclude.load('foo_vars', play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play)

        self.assertEqual(r._default_vars, dict(foo='bar', a=1, b=2))

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_with_vars_dir_vs_file(self):

        fake_loader = DictDataLoader({
            "/etc/ansible/roles/foo_vars/vars/main/foo.yml": """
            foo: bar
            """,
            "/etc/ansible/roles/foo_vars/vars/main.yml": """
            foo: bam
            """,
        })

        mock_play = MagicMock()
        mock_play.role_cache = {}

        i = RoleInclude.load('foo_vars', play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play)

        self.assertEqual(r._role_vars, dict(foo='bam'))

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_with_metadata(self):

        fake_loader = DictDataLoader({
            '/etc/ansible/roles/foo_metadata/meta/main.yml': """
                allow_duplicates: true
                dependencies:
                  - bar_metadata
                galaxy_info:
                  a: 1
                  b: 2
                  c: 3
            """,
            '/etc/ansible/roles/bar_metadata/meta/main.yml': """
                dependencies:
                  - baz_metadata
            """,
            '/etc/ansible/roles/baz_metadata/meta/main.yml': """
                dependencies:
                  - bam_metadata
            """,
            '/etc/ansible/roles/bam_metadata/meta/main.yml': """
                dependencies: []
            """,
            '/etc/ansible/roles/bad1_metadata/meta/main.yml': """
                1
            """,
            '/etc/ansible/roles/bad2_metadata/meta/main.yml': """
                foo: bar
            """,
            '/etc/ansible/roles/recursive1_metadata/meta/main.yml': """
                dependencies: ['recursive2_metadata']
            """,
            '/etc/ansible/roles/recursive2_metadata/meta/main.yml': """
                dependencies: ['recursive1_metadata']
            """,
        })

        mock_play = MagicMock()
        mock_play.collections = None
        mock_play.role_cache = {}

        i = RoleInclude.load('foo_metadata', play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play)

        role_deps = r.get_direct_dependencies()

        self.assertEqual(len(role_deps), 1)
        self.assertEqual(type(role_deps[0]), Role)
        self.assertEqual(len(role_deps[0].get_parents()), 1)
        self.assertEqual(role_deps[0].get_parents()[0], r)
        self.assertEqual(r._metadata.allow_duplicates, True)
        self.assertEqual(r._metadata.galaxy_info, dict(a=1, b=2, c=3))

        all_deps = r.get_all_dependencies()
        self.assertEqual(len(all_deps), 3)
        self.assertEqual(all_deps[0].get_name(), 'bam_metadata')
        self.assertEqual(all_deps[1].get_name(), 'baz_metadata')
        self.assertEqual(all_deps[2].get_name(), 'bar_metadata')

        i = RoleInclude.load('bad1_metadata', play=mock_play, loader=fake_loader)
        self.assertRaises(AnsibleParserError, Role.load, i, play=mock_play)

        i = RoleInclude.load('bad2_metadata', play=mock_play, loader=fake_loader)
        self.assertRaises(AnsibleParserError, Role.load, i, play=mock_play)

        # TODO: re-enable this test once Ansible has proper role dep cycle detection
        # that doesn't rely on stack overflows being recoverable (as they aren't in Py3.7+)
        # see https://github.com/ansible/ansible/issues/61527
        # i = RoleInclude.load('recursive1_metadata', play=mock_play, loader=fake_loader)
        # self.assertRaises(AnsibleError, Role.load, i, play=mock_play)

    @patch('ansible.playbook.role.definition.unfrackpath', mock_unfrackpath_noop)
    def test_load_role_complex(self):

        # FIXME: add tests for the more complex uses of
        #        params and tags/when statements

        fake_loader = DictDataLoader({
            "/etc/ansible/roles/foo_complex/tasks/main.yml": """
            - shell: echo 'hello world'
            """,
        })

        mock_play = MagicMock()
        mock_play.role_cache = {}

        i = RoleInclude.load(dict(role='foo_complex'), play=mock_play, loader=fake_loader)
        r = Role.load(i, play=mock_play)

        self.assertEqual(r.get_name(), "foo_complex")