X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/4da9b8fa085b6089c35573c6638fa137c131c30d..516b8d6c03058552cfe7c3bfda4362640a3077e1:/tasklib/tests.py

diff --git a/tasklib/tests.py b/tasklib/tests.py
index 2aebdcb..db88134 100644
--- a/tasklib/tests.py
+++ b/tasklib/tests.py
@@ -1,15 +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, local_zone, DATE_FORMAT
+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 = (
@@ -35,11 +40,14 @@ TASK_STANDARD_ATTRS = (
     '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)
@@ -73,6 +81,39 @@ class TaskFilterTest(TasklibTest):
         self.tw.tasks.all()[0].done()
         self.assertEqual(len(self.tw.tasks.completed()), 1)
 
+    def test_deleted_empty(self):
+        Task(self.tw, description="test task").save()
+        self.assertEqual(len(self.tw.tasks.deleted()), 0)
+
+    def test_deleted_non_empty(self):
+        Task(self.tw, description="test task").save()
+        self.assertEqual(len(self.tw.tasks.deleted()), 0)
+        self.tw.tasks.all()[0].delete()
+        self.assertEqual(len(self.tw.tasks.deleted()), 1)
+
+    def test_waiting_empty(self):
+        Task(self.tw, description="test task").save()
+        self.assertEqual(len(self.tw.tasks.waiting()), 0)
+
+    def test_waiting_non_empty(self):
+        Task(self.tw, description="test task").save()
+        self.assertEqual(len(self.tw.tasks.waiting()), 0)
+
+        t = self.tw.tasks.all()[0]
+        t['wait'] = datetime.datetime.now() + datetime.timedelta(days=1)
+        t.save()
+
+        self.assertEqual(len(self.tw.tasks.waiting()), 1)
+
+    def test_recurring_empty(self):
+        Task(self.tw, description="test task").save()
+        self.assertEqual(len(self.tw.tasks.recurring()), 0)
+
+    def test_recurring_non_empty(self):
+        Task(self.tw, description="test task", recur="daily",
+             due=datetime.datetime.now()).save()
+        self.assertEqual(len(self.tw.tasks.recurring()), 1)
+
     def test_filtering_by_attribute(self):
         Task(self.tw, description="no priority task").save()
         Task(self.tw, priority="H", description="high priority task").save()
@@ -128,6 +169,110 @@ class TaskFilterTest(TasklibTest):
     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):
 
     def test_create_unsaved_task(self):
@@ -150,6 +295,10 @@ 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()
@@ -164,6 +313,26 @@ 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()
@@ -171,6 +340,96 @@ 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()
@@ -355,6 +614,23 @@ class TaskTest(TasklibTest):
         t2 = self.tw.tasks.get(uuid=t1['uuid'])
         self.assertEqual(t1.__hash__(), t2.__hash__())
 
+    def test_hash_unequal_unsaved_tasks(self):
+        # Compare the hash of the task using two different objects
+        t1 = Task(self.tw, description="test task 1")
+        t2 = Task(self.tw, description="test task 2")
+
+        self.assertNotEqual(t1.__hash__(), t2.__hash__())
+
+    def test_hash_unequal_saved_tasks(self):
+        # Compare the hash of the task using two different objects
+        t1 = Task(self.tw, description="test task 1")
+        t2 = Task(self.tw, description="test task 2")
+
+        t1.save()
+        t2.save()
+
+        self.assertNotEqual(t1.__hash__(), t2.__hash__())
+
     def test_adding_task_with_priority(self):
         t = Task(self.tw, description="test task", priority="M")
         t.save()
@@ -470,16 +746,24 @@ 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'], ['test1', 'test2'])
+        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'], 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
@@ -501,15 +785,8 @@ class TaskTest(TasklibTest):
         # Test that any normalizer can handle None as a valid value
         t = Task(self.tw)
 
-        # These normalizers are not supposed to handle None
-        exempt_normalizers = ('normalize_uuid', )
-
-        normalizers = [getattr(t, normalizer_name) for normalizer_name in
-                       filter(lambda x: x.startswith('normalize_'), dir(t))
-                       if normalizer_name not in exempt_normalizers]
-
-        for normalizer in normalizers:
-            normalizer(None)
+        for key in TASK_STANDARD_ATTRS:
+            t._normalize(key, None)
 
     def test_recurrent_task_generation(self):
         today = datetime.date.today()
@@ -518,14 +795,50 @@ class TaskTest(TasklibTest):
         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):
 
     input_add_data = six.StringIO(
         '{"description":"Buy some milk",'
         '"entry":"20141118T050231Z",'
         '"status":"pending",'
+        '"start":"20141119T152233Z",'
         '"uuid":"a360fc44-315c-4366-b70c-ea7e7520b749"}')
 
+    input_add_data_recurring = six.StringIO(
+        '{"description":"Mow the lawn",'
+        '"entry":"20160210T224304Z",'
+        '"parent":"62da6227-519c-42c2-915d-dccada926ad7",'
+        '"recur":"weekly",'
+        '"status":"pending",'
+        '"uuid":"81305335-0237-49ff-8e87-b3cdc2369cec"}')
+
     input_modify_data = six.StringIO(input_add_data.getvalue() + '\n' +
         '{"description":"Buy some milk finally",'
         '"entry":"20141118T050231Z",'
@@ -538,12 +851,19 @@ 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_add_hook_input_recurring(self):
+        t = Task.from_input(input_file=self.input_add_data_recurring,
+                            backend=self.tw)
+        self.assertEqual(t['description'], "Mow the lawn")
+        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)
@@ -551,7 +871,7 @@ 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",
@@ -596,7 +916,7 @@ class TimezoneAwareDatetimeTest(TasklibTest):
 
     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.assertEqual(json.loads(t.export_data())['due'],
                          self.utctime_aware.strftime(DATE_FORMAT))
 
     def test_timezone_naive_date_setitem(self):
@@ -616,7 +936,7 @@ class TimezoneAwareDatetimeTest(TasklibTest):
 
     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.assertEqual(json.loads(t.export_data())['due'],
                          self.utctime_aware.strftime(DATE_FORMAT))
 
     def test_timezone_aware_datetime_setitem(self):
@@ -636,9 +956,87 @@ class TimezoneAwareDatetimeTest(TasklibTest):
 
     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.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):
 
     def setUp(self):
@@ -701,9 +1099,281 @@ class AnnotationTest(TasklibTest):
 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 not 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 not lazy1 != lazy2
+        assert type(lazy1) is LazyUUIDTask
+        assert type(lazy2) is LazyUUIDTask
+
+    def test_normal_to_lazy_inequality(self):
+        # Create a different UUID by changing the last letter
+        wrong_uuid = self.stored['uuid']
+        wrong_uuid = wrong_uuid[:-1] + ('a' if wrong_uuid[-1] != 'a' else 'b')
+
+        wrong_lazy = LazyUUIDTask(self.tw, wrong_uuid)
+
+        assert not self.stored == wrong_lazy
+        assert self.stored != wrong_lazy
+        assert type(wrong_lazy) is LazyUUIDTask
+
+    def test_lazy_to_lazy_inequality(self):
+        # Create a different UUID by changing the last letter
+        wrong_uuid = self.stored['uuid']
+        wrong_uuid = wrong_uuid[:-1] + ('a' if wrong_uuid[-1] != 'a' else 'b')
+
+        lazy1 = LazyUUIDTask(self.tw, self.stored['uuid'])
+        lazy2 = LazyUUIDTask(self.tw, wrong_uuid)
+
+        assert not lazy1 == lazy2
+        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"