]> git.madduck.net Git - etc/taskwarrior.git/blobdiff - tasklib/tests.py

madduck's git repository

Every one of the projects in this repository is available at the canonical URL git://git.madduck.net/madduck/pub/<projectpath> — see each project's metadata for the exact URL.

All patches and comments are welcome. Please squash your changes to logical commits before using git-format-patch and git-send-email to patches@git.madduck.net. If you'd read over the Git project's submission guidelines and adhered to them, I'd be especially grateful.

SSH access, as well as push access can be individually arranged.

If you use my repositories frequently, consider adding the following snippet to ~/.gitconfig and using the third clone URL listed for each project:

[url "git://git.madduck.net/madduck/"]
  insteadOf = madduck:

travis: Taskwarrior 2.5.1 is not yet released
[etc/taskwarrior.git] / tasklib / tests.py
index d498f099c28a3678fec396bb4cdce16cdba93124..b0e342d8348ddd9e451d78d9ecf7f16887e9b5af 100644 (file)
@@ -1,13 +1,20 @@
 # coding=utf-8
 
+import copy
 import datetime
 import itertools
+import json
+import pytz
 import six
 import shutil
+import sys
 import tempfile
 import unittest
 
-from .task import TaskWarrior, Task
+from .backends import TaskWarrior
+from .task import Task, ReadOnlyDictView, TaskQuerySet
+from .lazy import LazyUUIDTask, LazyUUIDTaskSet
+from .serializing import DATE_FORMAT, local_zone
 
 # http://taskwarrior.org/docs/design/task.html , Section: The Attributes
 TASK_STANDARD_ATTRS = (
@@ -30,14 +37,17 @@ TASK_STANDARD_ATTRS = (
     'priority',
     'depends',
     'tags',
-    'annotation',
+    'annotations',
 )
 
+total_seconds_2_6 = lambda x: x.microseconds / 1e6 + x.seconds + x.days * 24 * 3600
+
+
 class TasklibTest(unittest.TestCase):
 
     def setUp(self):
         self.tmp = tempfile.mkdtemp(dir='.')
-        self.tw = TaskWarrior(data_location=self.tmp)
+        self.tw = TaskWarrior(data_location=self.tmp, taskrc_location='/')
 
     def tearDown(self):
         shutil.rmtree(self.tmp)
@@ -123,6 +133,112 @@ class TaskFilterTest(TasklibTest):
         filtered_task = self.tw.tasks.get(project="random")
         self.assertEqual(filtered_task['project'], "random")
 
+    def test_filter_with_empty_uuid(self):
+        self.assertRaises(ValueError, lambda: self.tw.tasks.get(uuid=''))
+
+    def test_filter_dummy_by_status(self):
+        t = Task(self.tw, description="test")
+        t.save()
+
+        tasks = self.tw.tasks.filter(status=t['status'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_uuid(self):
+        t = Task(self.tw, description="test")
+        t.save()
+
+        tasks = self.tw.tasks.filter(uuid=t['uuid'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_entry(self):
+        t = Task(self.tw, description="test")
+        t.save()
+
+        tasks = self.tw.tasks.filter(entry=t['entry'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_description(self):
+        t = Task(self.tw, description="test")
+        t.save()
+
+        tasks = self.tw.tasks.filter(description=t['description'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_start(self):
+        t = Task(self.tw, description="test")
+        t.save()
+        t.start()
+
+        tasks = self.tw.tasks.filter(start=t['start'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_end(self):
+        t = Task(self.tw, description="test")
+        t.save()
+        t.done()
+
+        tasks = self.tw.tasks.filter(end=t['end'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_due(self):
+        t = Task(self.tw, description="test", due=datetime.datetime.now())
+        t.save()
+
+        tasks = self.tw.tasks.filter(due=t['due'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_until(self):
+        t = Task(self.tw, description="test")
+        t.save()
+
+        tasks = self.tw.tasks.filter(until=t['until'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_modified(self):
+        # Older TW version does not support bumping modified
+        # on save
+        if self.tw.version < six.text_type('2.2.0'):
+            # Python2.6 does not support SkipTest. As a workaround
+            # mark the test as passed by exiting.
+            if getattr(unittest, 'SkipTest', None) is not None:
+                raise unittest.SkipTest()
+            else:
+                return
+
+        t = Task(self.tw, description="test")
+        t.save()
+
+        tasks = self.tw.tasks.filter(modified=t['modified'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_scheduled(self):
+        t = Task(self.tw, description="test")
+        t.save()
+
+        tasks = self.tw.tasks.filter(scheduled=t['scheduled'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_tags(self):
+        t = Task(self.tw, description="test", tags=["home"])
+        t.save()
+
+        tasks = self.tw.tasks.filter(tags=t['tags'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_dummy_by_projects(self):
+        t = Task(self.tw, description="test", project="random")
+        t.save()
+
+        tasks = self.tw.tasks.filter(project=t['project'])
+        self.assertEqual(list(tasks), [t])
+
+    def test_filter_by_priority(self):
+        t = Task(self.tw, description="test", priority="H")
+        t.save()
+
+        tasks = self.tw.tasks.filter(priority=t['priority'])
+        self.assertEqual(list(tasks), [t])
+
 
 class TaskTest(TasklibTest):
 
@@ -146,6 +262,10 @@ class TaskTest(TasklibTest):
         t = Task(self.tw, description="test task")
         self.assertRaises(Task.NotSaved, t.refresh)
 
+    def test_start_unsaved_task(self):
+        t = Task(self.tw, description="test task")
+        self.assertRaises(Task.NotSaved, t.start)
+
     def test_delete_deleted_task(self):
         t = Task(self.tw, description="test task")
         t.save()
@@ -160,6 +280,26 @@ class TaskTest(TasklibTest):
 
         self.assertRaises(Task.CompletedTask, t.done)
 
+    def test_start_completed_task(self):
+        t = Task(self.tw, description="test task")
+        t.save()
+        t.done()
+
+        self.assertRaises(Task.CompletedTask, t.start)
+
+    def test_add_completed_task(self):
+        t = Task(self.tw, description="test", status="completed",
+                 end=datetime.datetime.now())
+        t.save()
+
+    def test_add_multiple_completed_tasks(self):
+        t1 = Task(self.tw, description="test1", status="completed",
+                 end=datetime.datetime.now())
+        t2 = Task(self.tw, description="test2", status="completed",
+                 end=datetime.datetime.now())
+        t1.save()
+        t2.save()
+
     def test_complete_deleted_task(self):
         t = Task(self.tw, description="test task")
         t.save()
@@ -167,6 +307,96 @@ class TaskTest(TasklibTest):
 
         self.assertRaises(Task.DeletedTask, t.done)
 
+    def test_starting_task(self):
+        t = Task(self.tw, description="test task")
+        now = t.datetime_normalizer(datetime.datetime.now())
+        t.save()
+        t.start()
+
+        self.assertTrue(now.replace(microsecond=0) <= t['start'])
+        self.assertEqual(t['status'], 'pending')
+
+    def test_completing_task(self):
+        t = Task(self.tw, description="test task")
+        now = t.datetime_normalizer(datetime.datetime.now())
+        t.save()
+        t.done()
+
+        self.assertTrue(now.replace(microsecond=0) <= t['end'])
+        self.assertEqual(t['status'], 'completed')
+
+    def test_deleting_task(self):
+        t = Task(self.tw, description="test task")
+        now = t.datetime_normalizer(datetime.datetime.now())
+        t.save()
+        t.delete()
+
+        self.assertTrue(now.replace(microsecond=0) <= t['end'])
+        self.assertEqual(t['status'], 'deleted')
+
+    def test_started_task_active(self):
+        t = Task(self.tw, description="test task")
+        t.save()
+        t.start()
+        self.assertTrue(t.active)
+
+    def test_unstarted_task_inactive(self):
+        t = Task(self.tw, description="test task")
+        self.assertFalse(t.active)
+        t.save()
+        self.assertFalse(t.active)
+
+    def test_start_active_task(self):
+        t = Task(self.tw, description="test task")
+        t.save()
+        t.start()
+        self.assertRaises(Task.ActiveTask, t.start)
+
+    def test_stop_completed_task(self):
+        t = Task(self.tw, description="test task")
+        t.save()
+        t.start()
+        t.done()
+
+        self.assertRaises(Task.InactiveTask, t.stop)
+
+        t = Task(self.tw, description="test task")
+        t.save()
+        t.done()
+
+        self.assertRaises(Task.InactiveTask, t.stop)
+
+    def test_stop_deleted_task(self):
+        t = Task(self.tw, description="test task")
+        t.save()
+        t.start()
+        t.delete()
+        t.stop()
+
+    def test_stop_inactive_task(self):
+        t = Task(self.tw, description="test task")
+        t.save()
+
+        self.assertRaises(Task.InactiveTask, t.stop)
+
+        t = Task(self.tw, description="test task")
+        t.save()
+        t.start()
+        t.stop()
+
+        self.assertRaises(Task.InactiveTask, t.stop)
+
+    def test_stopping_task(self):
+        t = Task(self.tw, description="test task")
+        now = t.datetime_normalizer(datetime.datetime.now())
+        t.save()
+        t.start()
+        t.stop()
+
+        self.assertEqual(t['end'], None)
+        self.assertEqual(t['status'], 'pending')
+        self.assertFalse(t.active)
+
     def test_modify_simple_attribute_without_space(self):
         t = Task(self.tw, description="test")
         t.save()
@@ -466,16 +696,80 @@ class TaskTest(TasklibTest):
     def test_adding_tag_by_appending(self):
         t = Task(self.tw, description="test task", tags=['test1'])
         t.save()
-        t['tags'].append('test2')
+        t['tags'].add('test2')
+        t.save()
+        self.assertEqual(t['tags'], set(['test1', 'test2']))
+
+    def test_adding_tag_twice(self):
+        t = Task(self.tw, description="test task", tags=['test1'])
+        t.save()
+        t['tags'].add('test2')
+        t['tags'].add('test2')
         t.save()
-        self.assertEqual(t['tags'], ['test1', 'test2'])
+        self.assertEqual(t['tags'], set(['test1', 'test2']))
 
     def test_adding_tag_by_appending_empty(self):
         t = Task(self.tw, description="test task")
         t.save()
-        t['tags'].append('test')
+        t['tags'].add('test')
         t.save()
-        self.assertEqual(t['tags'], ['test'])
+        self.assertEqual(t['tags'], set(['test']))
+
+    def test_serializers_returning_empty_string_for_none(self):
+        # Test that any serializer returns '' when passed None
+        t = Task(self.tw)
+        serializers = [getattr(t, serializer_name) for serializer_name in
+                       filter(lambda x: x.startswith('serialize_'), dir(t))]
+        for serializer in serializers:
+            self.assertEqual(serializer(None), '')
+
+    def test_deserializer_returning_empty_value_for_empty_string(self):
+        # Test that any deserializer returns empty value when passed ''
+        t = Task(self.tw)
+        deserializers = [getattr(t, deserializer_name) for deserializer_name in
+                        filter(lambda x: x.startswith('deserialize_'), dir(t))]
+        for deserializer in deserializers:
+            self.assertTrue(deserializer('') in (None, [], set()))
+
+    def test_normalizers_handling_none(self):
+        # Test that any normalizer can handle None as a valid value
+        t = Task(self.tw)
+
+        for key in TASK_STANDARD_ATTRS:
+            t._normalize(key, None)
+
+    def test_recurrent_task_generation(self):
+        today = datetime.date.today()
+        t = Task(self.tw, description="brush teeth",
+                 due=today, recur="daily")
+        t.save()
+        self.assertEqual(len(self.tw.tasks.pending()), 2)
+
+    def test_spawned_task_parent(self):
+        today = datetime.date.today()
+        t = Task(self.tw, description="brush teeth",
+                 due=today, recur="daily")
+        t.save()
+
+        spawned = self.tw.tasks.pending().get(due=today)
+        assert spawned['parent'] == t
+
+    def test_modify_number_of_tasks_at_once(self):
+        for i in range(1, 100):
+            Task(self.tw, description="test task %d" % i, tags=['test']).save()
+
+        self.tw.execute_command(['+test', 'mod', 'unified', 'description'])
+
+    def test_return_all_from_executed_command(self):
+        Task(self.tw, description="test task", tags=['test']).save()
+        out, err, rc = self.tw.execute_command(['count'], return_all=True)
+        self.assertEqual(rc, 0)
+
+    def test_return_all_from_failed_executed_command(self):
+        Task(self.tw, description="test task", tags=['test']).save()
+        out, err, rc = self.tw.execute_command(['countinvalid'],
+            return_all=True, allow_failure=False)
+        self.assertNotEqual(rc, 0)
 
 
 class TaskFromHookTest(TasklibTest):
@@ -484,6 +778,7 @@ class TaskFromHookTest(TasklibTest):
         '{"description":"Buy some milk",'
         '"entry":"20141118T050231Z",'
         '"status":"pending",'
+        '"start":"20141119T152233Z",'
         '"uuid":"a360fc44-315c-4366-b70c-ea7e7520b749"}')
 
     input_modify_data = six.StringIO(input_add_data.getvalue() + '\n' +
@@ -498,12 +793,13 @@ class TaskFromHookTest(TasklibTest):
          '"description":"test task"}')
 
     def test_setting_up_from_add_hook_input(self):
-        t = Task.from_input(input_file=self.input_add_data)
+        t = Task.from_input(input_file=self.input_add_data, backend=self.tw)
         self.assertEqual(t['description'], "Buy some milk")
         self.assertEqual(t.pending, True)
 
     def test_setting_up_from_modified_hook_input(self):
-        t = Task.from_input(input_file=self.input_modify_data, modify=True)
+        t = Task.from_input(input_file=self.input_modify_data, modify=True,
+                            backend=self.tw)
         self.assertEqual(t['description'], "Buy some milk finally")
         self.assertEqual(t.pending, False)
         self.assertEqual(t.completed, True)
@@ -511,11 +807,12 @@ class TaskFromHookTest(TasklibTest):
         self.assertEqual(t._original_data['status'], "pending")
         self.assertEqual(t._original_data['description'], "Buy some milk")
         self.assertEqual(set(t._modified_fields),
-                         set(['status', 'description']))
+                         set(['status', 'description', 'start']))
 
     def test_export_data(self):
         t = Task(self.tw, description="test task",
-            project="Home", due=datetime.datetime(2015,1,1,23,23,23))
+            project="Home",
+            due=pytz.utc.localize(datetime.datetime(2015,1,1,23,23,23)))
 
         # Check that the output is a permutation of:
         # {"project":"Home","description":"test task","due":"20150101232323Z"}
@@ -528,6 +825,153 @@ class TaskFromHookTest(TasklibTest):
         self.assertTrue(any(t.export_data() == expected
                             for expected in allowed_output))
 
+class TimezoneAwareDatetimeTest(TasklibTest):
+
+    def setUp(self):
+        super(TimezoneAwareDatetimeTest, self).setUp()
+        self.zone = local_zone
+        self.localdate_naive = datetime.datetime(2015,2,2)
+        self.localtime_naive = datetime.datetime(2015,2,2,0,0,0)
+        self.localtime_aware = self.zone.localize(self.localtime_naive)
+        self.utctime_aware = self.localtime_aware.astimezone(pytz.utc)
+
+    def test_timezone_naive_datetime_setitem(self):
+        t = Task(self.tw, description="test task")
+        t['due'] = self.localtime_naive
+        self.assertEqual(t['due'], self.localtime_aware)
+
+    def test_timezone_naive_datetime_using_init(self):
+        t = Task(self.tw, description="test task", due=self.localtime_naive)
+        self.assertEqual(t['due'], self.localtime_aware)
+
+    def test_filter_by_naive_datetime(self):
+        t = Task(self.tw, description="task1", due=self.localtime_naive)
+        t.save()
+        matching_tasks = self.tw.tasks.filter(due=self.localtime_naive)
+        self.assertEqual(len(matching_tasks), 1)
+
+    def test_serialize_naive_datetime(self):
+        t = Task(self.tw, description="task1", due=self.localtime_naive)
+        self.assertEqual(json.loads(t.export_data())['due'],
+                         self.utctime_aware.strftime(DATE_FORMAT))
+
+    def test_timezone_naive_date_setitem(self):
+        t = Task(self.tw, description="test task")
+        t['due'] = self.localdate_naive
+        self.assertEqual(t['due'], self.localtime_aware)
+
+    def test_timezone_naive_date_using_init(self):
+        t = Task(self.tw, description="test task", due=self.localdate_naive)
+        self.assertEqual(t['due'], self.localtime_aware)
+
+    def test_filter_by_naive_date(self):
+        t = Task(self.tw, description="task1", due=self.localdate_naive)
+        t.save()
+        matching_tasks = self.tw.tasks.filter(due=self.localdate_naive)
+        self.assertEqual(len(matching_tasks), 1)
+
+    def test_serialize_naive_date(self):
+        t = Task(self.tw, description="task1", due=self.localdate_naive)
+        self.assertEqual(json.loads(t.export_data())['due'],
+                         self.utctime_aware.strftime(DATE_FORMAT))
+
+    def test_timezone_aware_datetime_setitem(self):
+        t = Task(self.tw, description="test task")
+        t['due'] = self.localtime_aware
+        self.assertEqual(t['due'], self.localtime_aware)
+
+    def test_timezone_aware_datetime_using_init(self):
+        t = Task(self.tw, description="test task", due=self.localtime_aware)
+        self.assertEqual(t['due'], self.localtime_aware)
+
+    def test_filter_by_aware_datetime(self):
+        t = Task(self.tw, description="task1", due=self.localtime_aware)
+        t.save()
+        matching_tasks = self.tw.tasks.filter(due=self.localtime_aware)
+        self.assertEqual(len(matching_tasks), 1)
+
+    def test_serialize_aware_datetime(self):
+        t = Task(self.tw, description="task1", due=self.localtime_aware)
+        self.assertEqual(json.loads(t.export_data())['due'],
+                         self.utctime_aware.strftime(DATE_FORMAT))
+
+class DatetimeStringTest(TasklibTest):
+
+    def test_simple_now_conversion(self):
+        if self.tw.version < six.text_type('2.4.0'):
+            # Python2.6 does not support SkipTest. As a workaround
+            # mark the test as passed by exiting.
+            if getattr(unittest, 'SkipTest', None) is not None:
+                raise unittest.SkipTest()
+            else:
+                return
+
+        t = Task(self.tw, description="test task", due="now")
+        now = local_zone.localize(datetime.datetime.now())
+
+        # Assert that both times are not more than 5 seconds apart
+        if sys.version_info < (2,7):
+            self.assertTrue(total_seconds_2_6(now - t['due']) < 5)
+            self.assertTrue(total_seconds_2_6(t['due'] - now) < 5)
+        else:
+            self.assertTrue((now - t['due']).total_seconds() < 5)
+            self.assertTrue((t['due'] - now).total_seconds() < 5)
+
+    def test_simple_eoy_conversion(self):
+        if self.tw.version < six.text_type('2.4.0'):
+            # Python2.6 does not support SkipTest. As a workaround
+            # mark the test as passed by exiting.
+            if getattr(unittest, 'SkipTest', None) is not None:
+                raise unittest.SkipTest()
+            else:
+                return
+
+        t = Task(self.tw, description="test task", due="eoy")
+        now = local_zone.localize(datetime.datetime.now())
+        eoy = local_zone.localize(datetime.datetime(
+            year=now.year,
+            month=12,
+            day=31,
+            hour=23,
+            minute=59,
+            second=59
+            ))
+        self.assertEqual(eoy, t['due'])
+
+    def test_complex_eoy_conversion(self):
+        if self.tw.version < six.text_type('2.4.0'):
+            # Python2.6 does not support SkipTest. As a workaround
+            # mark the test as passed by exiting.
+            if getattr(unittest, 'SkipTest', None) is not None:
+                raise unittest.SkipTest()
+            else:
+                return
+
+        t = Task(self.tw, description="test task", due="eoy - 4 months")
+        now = local_zone.localize(datetime.datetime.now())
+        due_date = local_zone.localize(datetime.datetime(
+            year=now.year,
+            month=12,
+            day=31,
+            hour=23,
+            minute=59,
+            second=59
+            )) - datetime.timedelta(0,4 * 30 * 86400)
+        self.assertEqual(due_date, t['due'])
+
+    def test_filtering_with_string_datetime(self):
+        if self.tw.version < six.text_type('2.4.0'):
+            # Python2.6 does not support SkipTest. As a workaround
+            # mark the test as passed by exiting.
+            if getattr(unittest, 'SkipTest', None) is not None:
+                raise unittest.SkipTest()
+            else:
+                return
+
+        t = Task(self.tw, description="test task",
+                 due=datetime.datetime.now() - datetime.timedelta(0,2))
+        t.save()
+        self.assertEqual(len(self.tw.tasks.filter(due__before="now")), 1)
 
 class AnnotationTest(TasklibTest):
 
@@ -570,13 +1014,276 @@ class AnnotationTest(TasklibTest):
          task.save()
          self.assertEqual(task['project'], 'test')
 
+    def test_serialize_annotations(self):
+        # Test that serializing annotations is possible
+        t = Task(self.tw, description="test")
+        t.save()
+
+        t.add_annotation("annotation1")
+        t.add_annotation("annotation2")
+
+        data = t._serialize('annotations', t._data['annotations'])
+
+        self.assertEqual(len(data), 2)
+        self.assertEqual(type(data[0]), dict)
+        self.assertEqual(type(data[1]), dict)
+
+        self.assertEqual(data[0]['description'], "annotation1")
+        self.assertEqual(data[1]['description'], "annotation2")
+
 
 class UnicodeTest(TasklibTest):
 
     def test_unicode_task(self):
-        Task(self.tw, description="†åßk").save()
+        Task(self.tw, description=six.u("†åßk")).save()
         self.tw.tasks.get()
 
+    def test_filter_by_unicode_task(self):
+        Task(self.tw, description=six.u("†åßk")).save()
+        tasks = self.tw.tasks.filter(description=six.u("†åßk"))
+        self.assertEqual(len(tasks), 1)
+
     def test_non_unicode_task(self):
         Task(self.tw, description="test task").save()
         self.tw.tasks.get()
+
+class ReadOnlyDictViewTest(unittest.TestCase):
+
+    def setUp(self):
+        self.sample = dict(l=[1,2,3], d={'k':'v'})
+        self.original_sample = copy.deepcopy(self.sample)
+        self.view = ReadOnlyDictView(self.sample)
+
+    def test_readonlydictview_getitem(self):
+        l = self.view['l']
+        self.assertEqual(l, self.sample['l'])
+
+        # Assert that modification changed only copied value
+        l.append(4)
+        self.assertNotEqual(l, self.sample['l'])
+
+        # Assert that viewed dict is not changed
+        self.assertEqual(self.sample, self.original_sample)
+
+    def test_readonlydictview_contains(self):
+        self.assertEqual('l' in self.view, 'l' in self.sample)
+        self.assertEqual('d' in self.view, 'd' in self.sample)
+        self.assertEqual('k' in self.view, 'k' in self.sample)
+
+        # Assert that viewed dict is not changed
+        self.assertEqual(self.sample, self.original_sample)
+
+    def test_readonlydictview_iter(self):
+        self.assertEqual(list(k for k in self.view),
+                         list(k for k in self.sample))
+
+        # Assert the view is correct after modification
+        self.sample['new'] = 'value'
+        self.assertEqual(list(k for k in self.view),
+                         list(k for k in self.sample))
+
+    def test_readonlydictview_len(self):
+        self.assertEqual(len(self.view), len(self.sample))
+
+        # Assert the view is correct after modification
+        self.sample['new'] = 'value'
+        self.assertEqual(len(self.view), len(self.sample))
+
+    def test_readonlydictview_get(self):
+        l = self.view.get('l')
+        self.assertEqual(l, self.sample.get('l'))
+
+        # Assert that modification changed only copied value
+        l.append(4)
+        self.assertNotEqual(l, self.sample.get('l'))
+
+        # Assert that viewed dict is not changed
+        self.assertEqual(self.sample, self.original_sample)
+
+    def test_readonlydict_items(self):
+        view_items = self.view.items()
+        sample_items = list(self.sample.items())
+        self.assertEqual(view_items, sample_items)
+
+        view_items.append('newkey')
+        self.assertNotEqual(view_items, sample_items)
+        self.assertEqual(self.sample, self.original_sample)
+
+    def test_readonlydict_values(self):
+        view_values = self.view.values()
+        sample_values = list(self.sample.values())
+        self.assertEqual(view_values, sample_values)
+
+        view_list_item = list(filter(lambda x: type(x) is list,
+                                     view_values))[0]
+        view_list_item.append(4)
+        self.assertNotEqual(view_values, sample_values)
+        self.assertEqual(self.sample, self.original_sample)
+
+
+class LazyUUIDTaskTest(TasklibTest):
+
+    def setUp(self):
+        super(LazyUUIDTaskTest, self).setUp()
+
+        self.stored = Task(self.tw, description="this is test task")
+        self.stored.save()
+
+        self.lazy = LazyUUIDTask(self.tw, self.stored['uuid'])
+
+    def test_uuid_non_conversion(self):
+        assert self.stored['uuid'] == self.lazy['uuid']
+        assert type(self.lazy) is LazyUUIDTask
+
+    def test_lazy_explicit_conversion(self):
+        assert type(self.lazy) is LazyUUIDTask
+        self.lazy.replace()
+        assert type(self.lazy) is Task
+
+    def test_conversion_key(self):
+        assert self.stored['description'] == self.lazy['description']
+        assert type(self.lazy) is Task
+
+    def test_conversion_attribute(self):
+        assert type(self.lazy) is LazyUUIDTask
+        assert self.lazy.completed is False
+        assert type(self.lazy) is Task
+
+    def test_normal_to_lazy_equality(self):
+        assert self.stored == self.lazy
+        assert type(self.lazy) is LazyUUIDTask
+
+    def test_lazy_to_lazy_equality(self):
+        lazy1 = LazyUUIDTask(self.tw, self.stored['uuid'])
+        lazy2 = LazyUUIDTask(self.tw, self.stored['uuid'])
+
+        assert lazy1 == lazy2
+        assert type(lazy1) is LazyUUIDTask
+        assert type(lazy2) is LazyUUIDTask
+
+    def test_lazy_in_queryset(self):
+        tasks = self.tw.tasks.filter(uuid=self.stored['uuid'])
+
+        assert self.lazy in tasks
+        assert type(self.lazy) is LazyUUIDTask
+
+    def test_lazy_saved(self):
+        assert self.lazy.saved is True
+
+    def test_lazy_modified(self):
+        assert self.lazy.modified is False
+
+    def test_lazy_modified_fields(self):
+        assert self.lazy._modified_fields == set()
+
+
+class LazyUUIDTaskSetTest(TasklibTest):
+
+    def setUp(self):
+        super(LazyUUIDTaskSetTest, self).setUp()
+
+        self.task1 = Task(self.tw, description="task 1")
+        self.task2 = Task(self.tw, description="task 2")
+        self.task3 = Task(self.tw, description="task 3")
+
+        self.task1.save()
+        self.task2.save()
+        self.task3.save()
+
+        self.uuids = (
+            self.task1['uuid'],
+            self.task2['uuid'],
+            self.task3['uuid']
+        )
+
+        self.lazy = LazyUUIDTaskSet(self.tw, self.uuids)
+
+    def test_length(self):
+        assert len(self.lazy) == 3
+        assert type(self.lazy) is LazyUUIDTaskSet
+
+    def test_contains(self):
+        assert self.task1 in self.lazy
+        assert self.task2 in self.lazy
+        assert self.task3 in self.lazy
+        assert type(self.lazy) is LazyUUIDTaskSet
+
+    def test_eq_lazy(self):
+        new_lazy = LazyUUIDTaskSet(self.tw, self.uuids)
+        assert self.lazy == new_lazy
+        assert not self.lazy != new_lazy
+        assert type(self.lazy) is LazyUUIDTaskSet
+
+    def test_eq_real(self):
+        assert self.lazy == self.tw.tasks.all()
+        assert self.tw.tasks.all() == self.lazy
+        assert not self.lazy != self.tw.tasks.all()
+
+        assert type(self.lazy) is LazyUUIDTaskSet
+
+    def test_union(self):
+        taskset = set([self.task1])
+        lazyset = LazyUUIDTaskSet(
+            self.tw,
+            (self.task2['uuid'], self.task3['uuid'])
+        )
+
+        assert taskset | lazyset == self.lazy
+        assert lazyset | taskset == self.lazy
+        assert taskset.union(lazyset) == self.lazy
+        assert lazyset.union(taskset) == self.lazy
+
+        lazyset |= taskset
+        assert lazyset == self.lazy
+
+    def test_difference(self):
+        taskset = set([self.task1, self.task2])
+        lazyset = LazyUUIDTaskSet(
+            self.tw,
+            (self.task2['uuid'], self.task3['uuid'])
+        )
+
+        assert taskset - lazyset == set([self.task1])
+        assert lazyset - taskset == set([self.task3])
+        assert taskset.difference(lazyset) == set([self.task1])
+        assert lazyset.difference(taskset) == set([self.task3])
+
+        lazyset -= taskset
+        assert lazyset == set([self.task3])
+
+    def test_symmetric_difference(self):
+        taskset = set([self.task1, self.task2])
+        lazyset = LazyUUIDTaskSet(
+            self.tw,
+            (self.task2['uuid'], self.task3['uuid'])
+        )
+
+        assert taskset ^ lazyset == set([self.task1, self.task3])
+        assert lazyset ^ taskset == set([self.task1, self.task3])
+        assert taskset.symmetric_difference(lazyset) == set([self.task1, self.task3])
+        assert lazyset.symmetric_difference(taskset) == set([self.task1, self.task3])
+
+        lazyset ^= taskset
+        assert lazyset == set([self.task1, self.task3])
+
+    def test_intersection(self):
+        taskset = set([self.task1, self.task2])
+        lazyset = LazyUUIDTaskSet(
+            self.tw,
+            (self.task2['uuid'], self.task3['uuid'])
+        )
+
+        assert taskset & lazyset == set([self.task2])
+        assert lazyset & taskset == set([self.task2])
+        assert taskset.intersection(lazyset) == set([self.task2])
+        assert lazyset.intersection(taskset) == set([self.task2])
+
+        lazyset &= taskset
+        assert lazyset == set([self.task2])
+
+
+class TaskWarriorBackendTest(TasklibTest):
+
+    def test_config(self):
+        assert self.tw.config['nag'] == "You have more urgent tasks."
+        assert self.tw.config['debug'] == "no"